The pH of a solution of a strong base is 10.20 at 25°C. What is its hydronium-io

Question

The pH of a solution of a strong base is 10.20 at 25°C. What is its hydronium-ion concentration? A.1.1 × 10–4M B.2.6 × 10–3 M C.6.3 × 10–11 M D.1.6 × 10–4 M E.1.4 × 10–2M The pH of a solution of a strong base is 10.20 at 25°C. What is its hydronium-ion concentration? The pH of a solution of a strong base is 10.20 at 25°C. What is its hydronium-ion concentration? A.1.1 × 10–4M B.2.6 × 10–3 M C.6.3 × 10–11 M D.1.6 × 10–4 M E.1.4 × 10–2M A.1.1 × 10–4M B.2.6 × 10–3 M C.6.3 × 10–11 M D.1.6 × 10–4 M E.1.4 × 10–2M

Explanation / Answer

Given that pH = 10.20

We know that pH + pOH = 14

pOH = 14- 10.20 = 3.80

[OH] = 10^-pOH

= 10^-3.80

= 1.58*10^-4 M

OR we can write ; 1.6*10^-4 M

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