The pH of a Ba(OH) 2 solution is 10.00. What is the H+ ion concentration of this solution? A) 4.0 x 10–11 M
B) 1.6 x 10–10 M
C) 1.3 x 10–5 M
D) 1.0 x 10–10 M

Option D. 1×10¯¹⁰ M

Explanation:

From the question given above, the following data were obtained:

pH = 10

Hydrogen ion concentration, [H+] =?

The hydrogen ion concentration, [H+] of the Ba(OH)2 solution can be obtained as follow:

pH = – Log [H+]

pH = 10

10 = – Log [H+]

Divide both side by – 1

– 10 = Log [H+]

Take the antilog of – 10

[H+] = antilog (– 10)

[H+] = 1×10¯¹⁰ M

Therefore, the hydrogen ion concentration, [H+] of the Ba(OH)2 solution is 1×10¯¹⁰ M

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