Question

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

a. 4.0M c. 10^-4M
b. 10^-10M d. 10^4M

Answer 1

Answer:10 -10M

Step-by-step explanation:

Answer 2

c. 10^-4M

Step-by-step explanation:

pH measures the concentration of H+ ions in a solution. It's a scale and the value ranges from 1 to 14. 7 is a neutral pH, below 7 is acidic and more than 7 is basic.

pH = -log[H+] where [H+]= hydrogen ion concentration in Molarity (M)

Given pH =4 so,

4 = -log[H+]

[H+] = antilog(-4)= 10^-4 M

Hence, hydrogen ion concentration of lake = 10^-4 M