The Ka of some acid, HA, at 25.0 °C is 4.9 × 10-10. What is the pH of a 0.050 M aqueous solution of A-? 3.00 1.0 × 10-3 11.00 9.9 × 10-12 2.5 × 10-11
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The Ka of some acid, HA, at 25.0°C is 4.9 10-10. What is the pH of a 0.050 M aqueous solution of A? 1.0 x 10-3 O 9.9 x 10-12 11.00 3.00 O 2.5 x 10-11
HA(aq) is a weak acid with a dissociation constant, Ka, of 1.0 x 10-11. What is the pH of a solution 0.055 M in A-(aq)? The temperature is 25oC.
QUESTION 23 The Ka of hydrazoic acid (HN3) is 1.9 x 10-5 at 25.0 °C. What is the pH of a 0.15 M aqueous solution of HN3? OOO 0.82 1.95 5.23 2.77 -3.46
What is the pH of a 6.85 × 10−3 M weak acid solution, HA, if Ka = 4.5 × 10−6? Group of answer choices 1.2 4.8 9.1 3.8 6.5 What is the pOH of 4.50 × 10−4M HBr? Group of answer choices 10.7 6.7 1.7 12.3 3.3 What is the pH of a 9.67 × 10−3M solution of NaOH? Group of answer choices 13.0 4.6 12.0 9.4 2.0 A 6.5 × 10-2 M solution of a weak acid, HA, has...
Given that at 25.0 ∘C
Ka for HCN is 4.9×10^-10
Kb for NH3 is 1.8×10^−5
- Part C Calculate the pH of a 0.20 M solution of KCN at 25.0 °C. Express the pH numerically using two decimal places. View Available Hint(s) Templates Symbols uido redo reset keyboard shortcuts help pH = Submit Request Answer - Part D Calculate the pH of a 0.20 M solution of NH Brat 25.0°C. Express the pH numerically using two decimal places. View Available...
At a temperature of 25.0◦C, we dissolve 3.33 g of an acid, HA, in enough water to produce 25.0 mL of solution. We titrate this solution with a 0.444 M NaOH solution and we require 18.8 mL to reach the equivalence point. The ionization constant of HA, Ka, is 5.5 × 10−6 . The temperature is 25.0◦C throughout. (a) (2 points) What is the molar mass of HA? (b) (2 points) What was the original pH of the HA(aq) solution?...
8) The Ka of hydrofluoric acid (HF) at 25.0 C is 6.8 x10-4. What is the pH of a 0.15 M aqueous 8) solution of HF? A) 4.60 B) 0.82 C)3.64 D) 1.17 E) 2.00
Please answer all the questions #1. HA is a weak acid. an aqueous solution of HA was prepared by dissolving 0.185 mol of HA and diluted to 525mL. The pH of solution was 3.93 at 25.0°C. The Ka of HA is _____. #2. What is the pH of a solution at 25°C with[H^+] = 2.50 • 10^-5?
Question 1 : HA is a weak acid. Its ionization constant, Ka, is 1.2 x 10-13. Calculate the pH of an aqueous solution with an initial NaA concentration of 0.075 M. Question 2 : We place 0.143 mol of a weak acid, HA, in enough water to produce 1.00 L of solution. The final pH of the solution is 1.28 . Calculate the ionization contant, Ka, of HA. Question 3 : We place 0.661 mol of a weak acid, HA,...
(a) HA(aq) is a weak acid with a dissociation constant, Ka, of 1.0 x 10-11. What is the pH of a solution 0.066 M in A-(aq)? The temperature is 25oC. (b) For the reaction A(g) ⇋ B(g) + C(g), the equilibrium constant is 1.80 at 25.0oC and 4.36 at 75.0oC. Assuming ΔH and ΔS do not change with the temperature, calculate the value of the equilibrium constant at 50.0oC and the value of ΔSuniverse at 50.0oC.