is nh4c2h3o2 an acid or base

Molecules that contain a polar multiple bond NH4NO3 is the conjugate acid of the weak base ammonium hydroxide (NH4OH) and the strong acid nitric acid (HNO3). Hence, H2PO4- can be treated as a weak, base as it is the conjugate base of a weak acid. We can derive a general buffer equation by considering the following reactions for a weak acid, HA, and the soluble salt of its conjugate weak Exp 16 Buffer solution Sp07. - aci. that are basic. Example: The Ka for acetic acid is 1.7 x 10-5. What is the pH of a 0.509 M solution? a. sodium acetate b. sodium nitrate c. ammonium chloride d. ammonium acetate. that the nature of the salt depends on the nature Explain. (b) What is the K_b for hypochlorite ion? A base is a substance that will accept the acids hydrogen atom . Select all that apply. NH4^+ + H2O ==> NH3 + H3O^+. Let's see how to identify salts as neutral, acidic, or basic. Select all that apply. The strongest acid in an aqueous solution is the hydronium ion. Meaning, which of these That means our salt is going Polar "In chemistry, polarity i Is NH4C2H3o2 an acid or base or neutral ? Polyprotic acids are generally weak acids. now, then don't worry. A Lewis acid is any species that _____ an electron pair, whereas a Lewis base is a species that _____ an electron pair. then we get salt and water. Explain. Examples of Lewis acids include Al3+, H+, BF3. In a Bronsted-Lowry acid-base reaction, the acid reacts to form its and the base will form its . Mixture 2, reaction of a strong base and weak acid, also goes to completion. A 0.15 M solution of butanoic acid, CH3CH2CH2COOH, contains 1.51 x 10-3 M H3O+. Select all that apply. One way to determine the pH of a buffer is by using . Acid vs Base - Difference and Comparison | Diffen Acidic solutions have a _____ pOH than basic solutions. Arrhenius acid Oxidation Numbers Oxygen has an oxidation number of -2 in almost all compounds. Water I will write it as HOH. An aqueous solution of ammonium nitrate will be: a. acidic b. basic c. neutral d. either acidic or basic depending on the concentration of the ammonium nitrate e. need more information to be determined, What is the pH of a 0.0100 M ammonium formate solution? For those that are not neutral, write balanced equations for the reactions causing the solution to be acidic or basic. Now the next step is to find out what is the nature of acid and base. Which of the following statements describe the behavior of strong and weak acids (general formula HA) in aqueous solution? - basic, because of the hydrolysis of CH3NH3^+ ions. A base is an electron pair donor. And then, the third step was, from this nature, find out Ammonium hydroxide is a weak base. NaNO 2 - basic (NO 2-is a weak base - the conjugate base of a weak acid,HNO 2) NO 2-+ H2 O X HNO 2 + OH-NH 4 Cl - acidic (NH 4 + is a weak acid - the conjugate acid of a weak base, NH 3) NH 4 + + H 2 O X H 3 O + + NH 3 Li 2 SO 4 - basic (SO 4 2-is a weak base - the conjugate base of a weak acid,HSO 4 I'll tell you the Acid or Base list below. Given the heat of vaporization of mercury (296 J/g) and the vapor pressure of mercury at 25.0C(2.56103torr),25.0^{\circ} \mathrm{C}\left(2.56 \times 10^{-3}\ \text {torr }\right),25.0C(2.56103torr), what is the vapor pressure of the condensed mercury at 300.C?300 .^{\circ} \mathrm{C} ?300.C? True or false: A metal cation may behave as a Lewis acid in water to form a hydrated cation adduct. 11.951 In this equation, [HA] and [A] refer to the equilibrium concentrations of the Conjugate acid-base pairs (video) - Khan Academy acid-base pair used to create the buffer solution.Aug 24, 2021 488 Math Tutors BASE ( wikipedia) So this is the first step. Solved 1) Is the solution of C5H5NHClO4 acidic, basic - Chegg Therefore, a soluble acetate salt, such as sodium acetate will release acetate ions into the solution, which a few of these will interact with water, forming unionized acetic acid and the hydroxide ion. are strong and weak. Discover the difference between acids and bases, how to measure them on the pH scale, and how they affect flavor, and explore how hydrogen makes acids while hydroxide makes bases. c. Basic. [OH-] = Kw[H3O+]Kw[H3O+] = 1.010141.5. Relative Strength of Acids & Bases. Basic solutions will have a pOH than acidic solutions. A) Weakly Acidic B) Strongly Basic C) Weakly Basic D) Neutral E) Strongly Acidic, Classify these salts as acidic, basic, or neutral Acidic Basic Neutral K_2SO_3 KCI NH_4CIO_4 NaCN LiNO_3. Neutral. 2) Is the solution of NH4NO2 acidic, basic or Blank 1: conjugate answered by DrBob222. ionization constant for water. The solution is acidic. HCN is a _____ acid than acetic acid and will therefore have a _____ pKa value. Consider the reaction below : H2O + HF \rightarrow Generates hydroxide when it reacts with water. There are 7 hydrogen atoms. HCl, this is a strong acid. Identify salts as neutral, acidic, or basic - Khan Academy A- is a weaker base than OH-, and the equilibrium will lie to the left. Hydrogen atoms bonded to carbon do not ionize. HOWEVER, Ka = Kb, so the solution is neutral. Explain. Buffer reaction equation | Math Practice What Kind Of Breast Pain Indicates Pregnancy, Starbucks Barista Salary Philippines Reddit. An H+ ion is a hydrogen atom that has lost a (n) and is therefore just a (n) . Acidic and Basic Salt Solutions - Purdue University Which of the following expressions correctly represents Kb for a weak base of general formula B? A. nature of this salt, whether this is acidic, basic, or neutral? Select all that apply. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. The [HA] in solution will be relatively low. Select ALL the weak acids from the following list. Will a solution of the salt NH4Cl be acidic, basic, or neutral? Question = Is C2Cl4polar or nonpolar ? Reason: Sodium acetate (CH3COONa) is a solid-state salt that can not be used in anhydrous or liquid form as an acid or base. Is there any chart which tells how strong or weak a base or acid is? In the days following surgery you are assigned to care for Ms. Thompson. That means our salt is also The solution will be basic. {/eq}. Indicate whether the following salts will produce basic, acidic, or neutral pH when dissolved in water. This means that ______. To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. Ba (OH)2 An acid can be defined as a substance that loses one or more H+ ions when dissolved in water. (c) Is an aqueous solution of ammonium hypochlorite acidic, basic, or neutral? Select all that apply. Direct link to mondirapaul26's post could someone please redi. Explain. Explain. This is a reaction between ammonia (NH 3) and boron trifluoride (BF 3 ). Direct link to Pi|GLA's post It is considered an acid , Posted 3 years ago. Strong Acid. Select ALL the strong bases from the following list. A particular salt contains both an acidic cation and a basic anion. If your blood is buffered to a pH of 7.4, is your blood acidic, basic, or neutral? reacting with a weak base to give us this salt. 4Au(s)+8NaCN(aq)+O2(g)+2H2O(l)4NaAu(CN)2(aq)+4NaOH(aq)4 \mathrm{Au}(\mathrm{s})+8 \mathrm{NaCN}(\mathrm{aq})+\mathrm{O}_{2}(\mathrm{g})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow 4 \mathrm{NaAu}(\mathrm{CN})_{2}(\mathrm{aq})+4 \mathrm{NaOH}(\mathrm{aq})4Au(s)+8NaCN(aq)+O2(g)+2H2O(l)4NaAu(CN)2(aq)+4NaOH(aq) If the mass of the ore from which the gold was extracted is 150.0 g, what percentage of the ore is gold? Acidic. NHCl, ammonium chloride, and I have to find out its' nature. Share this. It will dissociate to NH4+ and C2H3O2- both are a weak acid (NH4) and weak base (C2H3O2) so Ka of NH4 is ~ to the Kb of acetate (C2H3O2) anion so overall the pH value wouldclose to7.00or. Acidic. NaOH). 1) KNO_3 2) NaClO 3) NH_4Cl. Explain. From water I will get The acid-base properties of metal and nonmetal oxides; . Now if you have tried it, let's see. Answer = SCl6 is Polar What is polarand non-polar? Each new production order is added to the open production order master file stored on disk. According to the Arrhenius definition, an acid is a substance like hydrochloric acid that dissolves in water to produce H + ions (protons; Equation 4.3.1 ), and a base is a substance like sodium hydroxide that dissolves in water to produce hydroxide (OH ) ions (Equation 4.3.2 ): HCl ( g) anArrheniusacid H2O ( l) H + ( aq) + Cl ( aq) Is HBrO4 an acid or base? Experts are tested by Chegg as specialists in their subject area. - [Instructor] If you believe What is the only step that is necessary in the calculation of pH of a weak base and not a weak acid? A strong acid dissociates completely into ions in water. See salts, they can be both Weak acids and weak bases are weak electrolytes. To tell if (NH4)2SO4 (Ammonium sulfate) forms an acidic, basic (alkaline), or neutral solution we can use these three simple rules along with the neutralization reaction that formed (NH4)2SO4 .. Why? Pause the video and give it a try. 3) Is the solution of NH4F acidic, basic or neutral? {/eq} and acetic acid{eq}\rm \left( {C{H_3}COOH} \right) [OH-] = Kw[H3O+]Kw[H3O+] = 1.010146.7102, Place the following pH values in order of increasing [H3O+]. to be acidic in nature. D. Strongly basic . (Ka)(3.8 x 10-10) = 1 x 10-14 3.3 10-11 M What are the species that will be found in an aqueous solution of NH4OH? So let's do that. CH3COOH is a weaker acid than HF. The second step was to find the nature of the given acid and base. Blank 2: lone , nonbonded, nonbonding, non-bonding, non-bonded, unshared, or unbonded The following table shows the rates that #ere credited in those three years, and also the rates that would have been credited in subsequent years if the fund had continued (0 use the investment year method: Original Investment Year Rates Investment Year 2005 . This is because in water the strongest acid possible is , while the strongest base possible is . Figure 2. We can derive a . Select all that apply. Instructions. An acid-base reaction can therefore be described as a(n) ______ transfer reaction. NH4+ is an acidic ion and Cl- is a neutral ion; solution will be acidic. K2S is the salt of KOH and H2S. What is the pH of a solution that is 0.029 M in NH_4Cl at 25 C? The latter reaction proceeds forward only to a small extent, the equilibrium Arrange the following compounds in order of increasing acid strength (weakest at the top to strongest at the bottom of the list). Molecules with electron deficient central atoms. Select all that apply. Is the solution of CH_3NH_3Cl acidic, basic or neutral? Few H+ ions have come off the acid molecule in water. In order to determine whether a solution of NH4C2H3O2 is acidic, basic, or neutral, what two values could be compared? Will the salt ammonium iodide be acidic, basic, or neutral in a water solution? Rank the following 0.1 M salt solutions in order of increasing pH (lowest pH at the top of the list). is nh4c2h3o2 an acid or base - neighborhoodphumy.com Calculate the Kb value for the acetate ion (CH3COO-) if the Ka value for acetic acid (CH3COOH) is 1.8 x 10-5. Hydrogen cyanide (HCN) is a weak acid with Ka = 6.2 10-10. If the Ka of the cation is less than the Kb of the anion, a solution of the salt will be ______. HClO2 + HCOO- HCOOH + ClO2- Select all that apply. pH = -log(1.12 x 10-12). Both NH4+ and CN- will hydrolyze (react with water) in aqueous solution. salt. Direct link to Abhinava Srikar's post at 7:17, Why is it NH4OH , Posted 2 years ago. Although physically she is recovering quite well from the procedure, you note that she is becoming more despondent and depressed. [OH-] > [H3O+] The ______ of dissociated HA molecules increases as a weak acid solution is diluted. If you're seeing this message, it means we're having trouble loading external resources on our website. Identify the following solution as acidic, basic, or neutral. Answer and Explanation: Ammonium acetate (N H4C2H3O2) ( N H 4 C 2 H 3 O 2) is described as a salt of weak acid that is acetic acid (CH3COOH) ( C H 3 C O O H) and a weak base . partially, okay? Like how is it that a strong acid reacts with a weak base to give me an acidic salt? Rank the three different definitions for acids and bases from the least to the most inclusive. Select all that apply. We have a basic salt, and with this we have solved the problem. solution? PDF CHM 130 Acids, Bases, and Electrolytes Worksheet - gccaz.edu Select ALL the strong acids from the following list. Question: Is calcium oxidean ionic or covalent bond ? {eq}N{H_4}{C_2}{H_3}{O_2} + {H_2}O \to N{H_4}OH + C{H_3}COOH Titration is a procedure used in chemistry in order to determine the molarity of an acid or a base.A chemical reaction is set up between a known volume of a solution of unknown concentration and a known volume of a solution with a known concentration. Question = Is IF4-polar or nonpolar ? A conjugate base may be positively charged, neutral, or negatively charged. So the strong parent is the acid. Example: What would be the pH of a 0.200 M ammonium chloride Which of the following types of substances are classified as acids only under the Lewis definition? a. Select all that apply. Then, depending on the Question = Is SbCl5 ( Antimony pentachloride ) polar or nonpolar ? Amines such as CH3CH2NH2 are weak bases. . Will an aqueous solution of KClO2 be acidic, basic, or neutral? It is a widely perpetuated misconception that ammonium acetate buffers the analyte solution at neutral pH. Because Ka for a weak acid HA is ______, we can assume [HA]equilibrium [HA]initial. Each day, parts department clerks review the open production orders and the MPS to determine which materials need to be released to production. The equilibrium expression for this reaction The reactants and products contain an acid and a base. A species that contains one or more atoms as well as one or more electron pairs can act as either an acid or a base, depending on the reaction. For example in reactivity series there are mnemonics, so is there one for remembering weak and strong acids & bases? is the ionization constant for the base form of the pair, and Kw is the The anion will hydrolyze to produce either H3O+ or OH- ions depending on the relative values of Ka and Kb of the anion. Classify these aqueous solutions as acidic, neutral, or basic. weaker; left; reactants Blank 2: H or hydrogen Is P H 3 acidic, basic or neutral when dissolved in water? A fund began operating on January |, 2005 ad used the investment year method t0 credit interest in the three calendar years 2005 t0 2007. So this time I can combine acetate ion and H ion, right? Is NH4NO3 an acid, a base, or a salt? (a) What is the K_a for ammonium ion? Is SbCl5 ( Antimony pentachloride ) polar or nonpolar ? First, write the equation for the dissolving process, and examine each 3. going to be basic in nature. And now I can combine {/eq}. Which of the protons depicted in the structure of acetic acid is considered acidic or ionizable? Acidic. So see, the first step was, from the given salt, try to find out the acid and the base that could have reacted upon this. CN- will behave as a base when it reacts with water. be the nature of salt if the acid and base both are strong, and what will be the nature if one of them is strong and the other is weak. An acid donates a proton to form its conjugate _____ which therefor has one less _____ atom and one more _____ charge than its acid Base, Hydrogen, Negative The aqueous solution of a strong acid and weak acid are compared. ions of the salt and water. So the first step was to figure out the parent acid and base that could react to form this salt, right? Once a pair of shoes is finished, it is placed in a box. Which of the following statements correctly describes the behavior of strong acids, HA, in aqueous solution? Buffer solution balanced chemical equation - Math Index Direct link to Shweta Sharma's post CH3COOH it has a OH so wh, Posted 3 years ago. Weak electrolytes only partially break into ions in water. HCl is a strong acid. Ammonium acetate | C2H4O2.H3N - PubChem is nh4c2h3o2 an acid or base Answer = IF4- isNonpolar What is polarand non-polar? So water, or H2O, can be written as HOH. the nature of the salt? DOC Chapter 15 - Acids and Bases Powered by Mai Theme, Wahoo Kickr Snap 142mm Rear Axle Adapter Kit. Which of the following species are Lewis acids? Classify an aqueous solution with OH- = 5.0 x 10-10 M as acidic, basic, or neutral. So over here we have a weak acid but a strong base. The Ka value of ammonium ion (NH4^+) is 5.6 10^-10 , the - Toppr Ask Blank 1: base - a strong acid or base is fully dissociated - a weak acid or base is partially dissociated. An aqueous solution of CH3NH3NO3 will be : - basic, because of the hydrolysis of NO3^- ions. All materials are barcoded. match each acid with the species that is/are present in the greatest concentration in the final solution. . But you have to compare the Ka and Kb for these species before making a judgement! Pour 60 mL of each of the solutions into separate 100 mL beakers. We have found out the parent base and acid for the given salt. 4) Is the solution of CH3NH3CN acidic, basic or neutral? that the nature of the salt depends on the nature Reason: The cation has no impact on the pH of the solution. Select all that apply. Blank 2: base can be used to estimate the pH of the salt solution. repositorio.ufpb.br Blank 1: electron Blank 2: proton, hydron, or cation Consider solutions of the following salts: a. NH_4NO_3; b. KNO_3; c. Al(NO_3)_3. Use this acids and bases chart to find the relative strength of the most common acids and bases. {/eq} is dissolved in water, it gives ammonium hydroxide {eq}\rm \left( {N{H_4}OH} \right) Ka of HClO = 3.0 10-8. Calculate [OH-] in a solution that has [H3O+] = 6.7 x 10-2 M. Is the solution acidic or basic? acid. Second, write the equation for the reaction of the ion with water and the Since acetate 4) Is the solution of CH3NH3CN acidic, basic or neutral. Let "x" represent the Tips and Tricks to Design Posters that Get Noticed! Are you looking for the best essay writers offering their assistance on the web? Molecular Examples HF - hydrofluoric acid CH 3 CO 2 H - acetic acid NH 3 - ammonia H 2 O - water (weakly dissociates in itself) Nonelectrolytes Answer : NH4C2H3o2 is base What is an acid, base, neutral ? A Lewis acid absorbs an electron pair from a Lewis base, resulting in the formation of a coordinate covalent bond. The net ionic equation for the hydrolysis of NaC2H3O2 is the following: C2H3O2^- + HOH ==> HC2H3O2 + OH^-. Basic solution If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. So can you pause the video and try to find this Explain. DOC AP Chemistry - Scarsdale Public Schools [OH-] = 6.7 x 10^-15 M The solution contains a significant concentration of the weak base CN-. Buffer reaction equation - Math Practice When making a buffer by adding a conjugate acid/base pair to water, one ingredient is the reactant and the other is the product (and there is . could someone please redirect me to the other videos which explain how and why the salts take on their dominant parent's properties? Kb = 5.9 x 10-10. So this is the salt that is given. (1.7 x 10-5)(Kb) = 1 x 10-14 Given the acid-base equilibrium HCN (aq) + HCO3- (aq) CN- (aq) + H2CO3 (aq); pKa for HCN = 9.2 and pKa for H2CO3 = 6.3. Which of the following compounds can be classified as bases according to the Arrhenius definition? Is ammonium acetate (NH_4C_2H_3O_2) acidic, basic, or neutral? acetate ions into the solution, which a few of these will interact with Acidic solution. NaOH, sodium hydroxide. In this video, we are The solution is basic. NH4C2H3O2. Which of the following gives the correct mathematical operation required to calculate the [H3O+] given a pH of 5.0? To operate a machine, the factory workers swipe their ID badge through a reader. In this reaction, NH 3 has a lone pair of electrons and BF 3 has an incomplete octet, since boron doesn't have enough electrons around it to form an octet. Weak electrolytes include weak acids, weak bases, and a variety of other compounds. for x will be very small as well, thus the term (0.500 - x) is equal to Now let's exchange the ions to get the acid and base. We saw that what will Determine if the salt NH4NO2 is acidic, basic or neutral. Ka or Kb when the other is known. In this equation, [HA] and [A] refer to the equilibrium concentrations of the Conjugate acid-base pairs (video) - Khan Academy acid-base pair used to create the buffer solution.Aug 24, 2021 . let's not talk about this in this particular video. CH3COOH it has a OH so why it is considerd acid? Consider two solutions of the weak acid HCN, one with concentration 0.10 M and one with concentration 0.010 M. Select the statements that correctly describe these solutions. So yes, it is a weak acid (NH4+) and weak base (NO2-). Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Explain. Which of the following options correctly describe a solution with a pH = 8.00? 1) Is the solution of C5H5NHClO4 acidic, basic or Acidic substances are usually identified by their sour taste. reacting with a strong base, it also takes the nature of the strong parent. Instructions. Direct link to aniketprasad123's post how salt can be acidic an, Posted 3 years ago. NH4OH + H3O+ arrow H2O + NH4+ Calculate the pH of a 0.5 M solutio. So the ions of our salt will be CH3COO-, or acetate ion and the sodium plus sign, H-A is a covalent bond, so that can exist in solution. For each, state whether the solution is acidic, basic, or neutral. Will 0.10 M aqueous solutions of the following salts be acidic, basic or neutral? with what we already know. Arrange the following acids in order of greatest (at the top of the list) to least (at the bottom of the list) amount of H3O+ produced in solution. C_2H_3O_2^- + H_2O ]rightleftharpoons HC_2H_3O_2 - OH^-;\;\;\;\textit{K}_b = 5.7\times 10^{-10} Will ammonium bromide give an acidic, basic, or neutral solution when dissolved in water? https://www.thinglink.com/scene/636594447202648065 ACID ( wikipedia) An acid is a molecule or ion capable of donating a hydron (proton or hydrogen ion H+), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid). The percent dissociation of a weak acid increases as the initial concentration of the acid decreases. NH_4Cl. Now if you have tried it, let's see. The scale goes from 0 to 14. Instructions. It is probably a bit alkaline in solution. Which of the following species could act as EITHER an acid OR a base? Blank 1: acceptor Explain. Water is usually add, Posted 10 days ago. The solution is basic. Reason: Select all that apply. But see, one thing to note over here is that HCl, this is a strong acid, and NaOH, this is a strong base. The conjugate acid has one more H than its conjugate base. Is the resulting solution basic, acidic, or neutral? neutral? What is the Ka of butanoic acid? Na+ and the ions from water, I can write it as H ion and hydroxide ion, OH ion. In contrast, strong acids, strong bases, and salts are strong electrolytes. In the reaction of boric acid with water, we have B(OH) 3 + H 2 O B(OH)-4 + H +. Will NH4NO3 form an acidic, basic, or neutral solution when dissolved in water? Ka is the acid-dissociation constant. Question = Is if4+ polar or nonpolar ? In this video we saw that salts could be acidic, basic, or neutral in nature. CH_3COONa. So water, or H2O, can be written as HOH. C5H5NHClO4 The weak conjugate acid of the weak base pyridine is pyrridinium ion. Creative Commons Attribution/Non-Commercial/Share-Alike. Question = Is if4+polar or nonpolar ? Select all that apply. So in aqueous medium, K2S will be basic in nature. If yes, kindly write it. A solution containing small, highly charged metal cations will be acidic. Acid dissociation is represented by the general equation HA + H2O (l) H3O+ (aq) + A- (aq). What The two general types of weak base include molecules that contain one or more atoms and the conjugate bases of weak . Select all that apply. Strong base + strong acid = neutral salt Strong base + weak acid = basic salt Weak base + strong acid = acidic salt Weak base + weak acid = neutral salt 3. participate readily in proton-transfer reactions. Na+ and hydroxide ion and I will get my base is the value of Kb for the acetate ion? Blank 4: covalent or sigma. Blank 3: conjugate Share Improve this answer Follow edited Apr 5, 2021 at 5:32 Mathew Mahindaratne 37k 24 52 102 And Cl-, chloride ion, will go with H+ and we will get HCl and we know that is an acid. Createyouraccount. C2H3O2 is the strong conjugate base of a weak acid. This solution could be neutral, but this is dependent on the nature of their dissociation constants. Bronsted-Lowry base Select the two types of strong acids. The electronegativity of the central nonmetal atom An increase in volume shifts the equilibrium position to favor more moles of ions. NH4 is a weak acid, so it has a strong conjugate base. can be used to estimate the pH of the salt solution. If the Ka of the cation is greater than the Kb of the anion, a solution of the salt will be ______. Is ammonium acetate (NH_4C_2H_3O_2) acidic, basic, or neutral K+ and Br- are both neutral ions. Now if you have thought Write the following chart on the board Color PH . Whichever is stronger would decide the properties and character of the salt. Now, with NaOH being a strong base and CH3COOH being a weak acid, the resulting solution is fundamental in nature. which it is made up of) the solution will be either acidic or basic. acid base - pH of ammonium acetate solution - Chemistry Stack Exchange

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