Question

The pH of Windex was measured to be 12.50. The hydroxide concentration is:

A. 0.18 mol/L
B. 3.2 x 10^-2 mol/L
C. 3.2 x 10^-13 mol/L
D. 1.1 mol/L

Answer 1

The hydroxide concentration in Windex is approximately 0.032 mol/L.

Step-by-step explanation:

The pH of Windex is 12.50, which indicates that it is a basic solution. To find the hydroxide concentration, we can use the relationship between pH and pOH. Since pH + pOH = 14, we can calculate the pOH value by subtracting the pH from 14. In this case, the pOH is 14 - 12.50 = 1.50.

Next, we can use the relationship between pOH and hydroxide ion concentration. On the pH scale, a pOH of 1.50 corresponds to a hydroxide concentration of 10^(-1.50) mol/L. Therefore, the hydroxide concentration in Windex is approximately 0.032 mol/L.