### Acid Dissociation Constant (Ka) Calculation and Comparison**Problem Statement:****2. Answer the questions for the acid below:**\[ \text{HA(aq)} + \text{H}_2\text{O(l)} \rightleftharpoons \text{H}_3\text{O}^+ \text{(aq)} + \text{A}^- \text{(aq)} \]**a) Write the acid dissociation constant, \( K_a \), expression for the reaction:**\[ K_a = \frac{[\text{H}_3\text{O}^+][\text{A}^-]}{[\text{HA}]} \]**b) If \([\text{A}^-] = 0.030 \, \text{M}\), \([\text{H}_3\text{O}^+] = 0.010 \, \text{M}\), and \([\text{HA}] = 0.5 \, \text{M}\), what is the value of \( K_a \)?**Using the expression for \( K_a \), substitute the given concentrations:\[ K_a = \frac{(0.010 \, \text{M})(0.030 \, \text{M})}{0.5 \, \text{M}} = \frac{0.0003 \, \text{M}^2}{0.5 \, \text{M}} = 0.0006 \]So, the value of \( K_a \) is 0.0006.**c) If another acid, HB, has a \( K_a \) value of \( 1.0 \times 10^{-10} \), which acid is stronger? HA or HB? Why?**Since the strength of an acid is directly proportional to the value of its \( K_a \), the acid HA is stronger than HB. The \( K_a \) value of HA (0.0006) is greater than the \( K_a \) value of HB (\(1.0 \times 10^{-10}\)), indicating that HA dissociates to a greater extent in solution than HB.

Given reaction: HA(aq) + H2O(l) ⇔H3O+(aq) + A-(aq) Acidic strength is…

2. Answer the questions for the acid below: a) Write the acid dissociation constant, Ka, expression for the reaction: b) If [A] = 0.030 M, [H3O+] = 0.010 M, and [HA] = 0.5 M, what is the value of Ka? c) If another acid, HB, has a Ka value of 1.0 x 10-10, which acid is stronger? HA or HB? Why? HA(aq) + H₂O(1)→ H30+ (aq) + A¯ (aq)

2. Answer the questions for the acid below: a) Write the acid dissociation constant, Ka, expression for the reaction: b) If [A] = 0.030 M, [H3O+] = 0.010 M, and [HA] = 0.5 M, what is the value of Ka? c) If another acid, HB, has a Ka value of 1.0 x 10-10, which acid is stronger? HA or HB? Why? HA(aq) + H₂O(1)→ H30+ (aq) + A¯ (aq)

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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