Question

The pOH of a solution is 9.21. Calculate the hydrogen ion concentration of the solution. Be sure to report your answer to the correct number of significant figures

Answer 1

The hydrogen ion concentration of the solution is approximately 7.38 x 10⁻¹⁰ M. The solution is slightly basic.

Step-by-step explanation:

The pOH of a solution is 9.21. To calculate the hydrogen ion concentration of the solution, we can use the relationship between pOH and hydroxide ion concentration. The pOH is the negative logarithm (base 10) of the hydroxide ion concentration (OH-). So, to find [OH-], we can take the antilog of the negative pOH value. In this case, the pOH is 9.21, so the hydroxide ion concentration is 10^(-9.21).

Using a calculator, the hydroxide ion concentration is approximately 7.38 x 10⁻¹⁰ M. As pure water has a hydroxide ion concentration of 1 x 10⁻⁷ M, this calculated concentration indicates that the solution is slightly basic.

Answer 2

[OH-] = 6.17 *10^-10

Step-by-step explanation:

Step 1: Data given

pOH = 9.21

Step 2: Calculate [OH-]

pOH = -log [OH-] = 9.21

[OH-] = 10^-9.21

[OH-] = 6.17 *10^-10

Step 3: Check if it's correct

pOH + pH = 14

[H+]*[OH-] = 10^-14

pH = 14 - 9.21 = 4.79

[H+] = 10^-4.79

[H+] = 1.62 *10^-5

6.17 * 10^-10 * 1.62 * 10^-5 = 1* 10^-14