Question

A) Calculate the pH of a 0.1 mol/L solution of hydrosulfuric acid [4 marks]

b) Calculate the concentration of H3O+ present in this solution (2 marks)

Answer 1

a) The pH of a 0.1 mol/L solution of hydrosulfuric acid is 1.00.

b) The concentration of H3O+ present in this solution is 0.1 mol/L.

Answer 2

A) To calculate the pH of a 0.1 mol/L solution of hydrosulfuric acid (H2S), we can first calculate the concentration of hydronium ions (H3O+) produced in solution.

Hydrosulfuric acid dissociates in water according to the following equation:

H2S + H2O → H3O+ + HS-

Since the concentration of hydrosulfuric acid is 0.1 mol/L, the concentration of hydronium ions produced will also be 0.1 mol/L.

Next, we can use the concentration of hydronium ions to calculate the pH of the solution:

pH = -log[H3O+] = -log(0.1) = 1

So, the pH of a 0.1 mol/L solution of hydrosulfuric acid is 1.

B) The concentration of H3O+ present in the solution is 0.1 mol/L.

Step-by-step explanation:

ALLEN