Concept explainers
(a)
Interpretation:
The equilibrium constant of various acid-base reactions has to be calculated.
Concept introduction:
An integer that shows the correlation between quantity of starting material and product of a reversible reaction present at equilibrium is called equilibrium constant.
To give: Equilibrium constant of strong acid reacts with strong base.
(b)
Interpretation:
The equilibrium constant of various acid-base reactions has to be calculated.
Concept introduction:
An integer that shows the correlation between quantity of starting material and product of a reversible reaction present at equilibrium is called equilibrium constant.
To give: equilibrium constant of strong acid reacts with weak base(
(c)
Interpretation:
The equilibrium constant of various acid-base reactions has to be calculated.
Concept introduction:
An integer that shows the correlation between quantity of starting material and product of a reversible reaction present at equilibrium is called equilibrium constant.
To give: equilibrium constant of weak acid (acetic acid) reacts with strong base.
(d)
Interpretation:
The equilibrium constant of various acid-base reactions has to be calculated.
Concept introduction:
An integer that shows the correlation between quantity of starting material and product of a reversible reaction present at equilibrium is called equilibrium constant.
To give: Equilibrium constant of weak acid (acetic acid) reacts with weak base (
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Chemistry: Atoms First
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- The major component of vinegar is acetic acid, CH3COOH. Its Ka is 1.8 × 10-5 . One student used 1.000 M NaOH to titrate 25.00 mL vinegar. At the end point, 21.82 mL NaOH was used. (a) What is the concentration of CH3COOH in vinegar? (b) What is the pH of the solution at the end point? (c) What indicator(s) the student should use in this titration? Explainarrow_forwardGiven that Ka's for hydrofluoric acid (HF) and boric acid (H3BO3) are 6.3 x 10-4 and 5.4 x 10-10, respectively, calculate the pH of the following solutions: (a) The mixture from adding 50 mL 0.2 M HF to 50 mL 0.5 M sodium borate (NaH2BO3). (b) The mixture from adding an additional 150 mL 0.2 M HF to the solution in (a), i.e., a total of 200 mL 0.2 M HF was added to 50 mL 0.5 M NaH2BO3.arrow_forwardChlorobenzene, C6H5Cl, is a key intermediate in the manufacture of dyes and pesticides. It is made by the chlorination of benzene, catalyzed by FeCl3, in this series of steps:(a) Which of the step(s) is (are) Lewis acid-base reactions?(b) Identify the Lewis acids and bases in each of those steps.arrow_forward
- A 0.018 M solution of salicylic acid, HOC6H4CO2H, has the same pH as 0.0038 M HNO3solution. (a) Write an equation for the ionization of salicylic acid in aqueous solution. (Assume only the –CO2H portion of the molecule ionizes.) (b) What is the pH of solution containing 0.018 M salicylic acid? (c) Calculate the Ka of salicylic acid.arrow_forwardCOHSOH(ag) + H2On + CeHsO (aq) + H3O*(a9) Ka= 1.12 x 10-10 (a) Phenol is a weak acid that partially dissociates in water according to the equation above. Write the equilibrium-constant expression for the dissociation of the acid in water. (b) What is the pH of a 0.75 M CaHsOH(ag) solution? (C) For a certain reaction involving CaHsOH(ag) to proceed at a significant rate, the phenol must be primarily in its deprotonated form, C3H5O (eg). In order to ensure that the CsHsOH(aq) is deprotonated, the reaction must be conducted in a buffered solution. On the number scale below, circle each pH for which more than 50 percent of the phenol molecules are in the deprotonated form (CoHsO (aq). Justify your answer. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Justification: (d) CeHsOH(ag) reacts with NaOH(ag). Write a net ionic equation representing this reaction (aka: invasion equation). (e) What is the pH of the resulting solution when 30 mL of 0.40 M CSH5OH(aq) is added to 25 mL of 0.60 M NAOH. Show all work…arrow_forwardMethanoic acid is also called formic acid. It has the chemical formula HCOOH(l). It is a colourless fuming liquid that is mainly used as a preservative. It exhibits the following equilibrium in water:HCOOH(aq) + H2O(l) → HCOO–(aq) + H3O+(aq) 3) A 35.0 mL sample of (monoprotic) lactic acid, C3H6O3, is titrated with 20.0 mL of a 4.0 x 10-4 mol/L sodium hydroxide solution. What is the pH of the resulting solution at the equivalence point, if Ka for lactic acid is 1.4 x 10-4? PLEASE HELP THIS IS VERY URGENTarrow_forward
- (a) Using the expression Ka=[H+][A−]/[HA], explain how to determine which solution has the lower pH, 0.10MHF(aq) or 0.10MHC2H3O2(aq). Do not perform any numerical calculations. (b) Which solution has a higher percent ionization of the acid, a 0.10M solution of HC2H3O2(aq) or a 0.010M solution of HC2H3O2(aq) ? Justify your answer including the calculation of percent ionization for each solution.arrow_forward(a) Calculate the OH¯ concentration in an aqueous solution at 25°C with an H3O™ concentration of 1.03 x 10 M. х 10 M (b) The value of K, at 50°C is 5.48 × 10¬14. Calculate the OH¯ concentration from the above solution at 50°C. x 10arrow_forwardWrite the expression for K, and K, for the reaction PH;BCl,(s) = PH;(e) + BCl(g) 1.arrow_forward
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