2. The weak acid HCN establishes an equilibrium with its ions when dissolved in water.HCN (aq) -→ H(aq) to CN (aq)a) Complete the table below for the addition of KCN and NaOH to the solution.Concentration(s)Initially changedWill Q increaseor decrease?Response ofHCNResponse of H+ Response of CN-(increase ordecrease inStress(increase ordecrease in(increase ordecrease inconcentration)concentration)concentration)Solid KCN isaddedNaOH isaddedb) If a 100 ml solution of HCN is diluted to a volume of 200 mL by what factor will Q change?Show this change using the Q expression.c) What direction will the reaction shift when the solution is diluted?

The reaction for dissociation of HCN is given by, HCN(aq) ⇔ H+(aq) + CN-(aq) When KCN is added, it…

2. The weak acid HCN establishes an equilibrium with its ions when dissolved in water. HCN (aq) -→ H'(aq) to CN (aq) a) Complete the table below for the addition of KCN and NaOH to the solution. Stress Concentration(s) Will Q increase Initially changed Response of HCN Response of H+ Response of CN- (increase or decrease in or decrease? (increase or decrease in (increase or decrease in concentration) concentration) concentration) Solid KCN is added NaOH is added b) If a 100 mL solution of HCN is diluted to a volume of 200 ml by what factor will Q change? Show this change using the Q expression. c) What direction will the reaction shift when the solution is diluted?

2. The weak acid HCN establishes an equilibrium with its ions when dissolved in water. HCN (aq) -→ H'(aq) to CN (aq) a) Complete the table below for the addition of KCN and NaOH to the solution. Stress Concentration(s) Will Q increase Initially changed Response of HCN Response of H+ Response of CN- (increase or decrease in or decrease? (increase or decrease in (increase or decrease in concentration) concentration) concentration) Solid KCN is added NaOH is added b) If a 100 mL solution of HCN is diluted to a volume of 200 ml by what factor will Q change? Show this change using the Q expression. c) What direction will the reaction shift when the solution is diluted?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

2. The weak acid HCN establishes an equilibrium with its ions when dissolved in water.
HCN (aq) -→ H(aq) to CN (aq)
a) Complete the table below for the addition of KCN and NaOH to the solution.
Concentration(s)
Initially changed
Will Q increase
or decrease?
Response of
HCN
Response of H+ Response of CN-
(increase or
decrease in
Stress
(increase or
decrease in
(increase or
decrease in
concentration)
concentration)
concentration)
Solid KCN is
added
NaOH is
added
b) If a 100 ml solution of HCN is diluted to a volume of 200 mL by what factor will Q change?
Show this change using the Q expression.
c) What direction will the reaction shift when the solution is diluted?

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