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Oliga [24]
3 years ago
6

Calculate the ph of a solution in which [oh−]=7.1×10−3m.express the ph of the solution to two decimal places.

Chemistry
1 answer:
Phoenix [80]3 years ago
6 0

Answer is: pH value of solution is 11.85.<span>
[</span>OH⁻] = 7.1·10⁻³ M;  equilibrium concentration of hydroxide anions.

[OH⁻]·[H⁺] = Kw.

0.0071 mol/L · [H⁺] = 10⁻¹⁴ mol²/L².

[H⁺] = 10⁻¹⁴ mol²/L² ÷ 7.1·10⁻³ mol/L.

[H⁺] = 1.4·10⁻¹² mol/L.

pH = -log[H⁺].

pH = -log(1.4·10⁻¹² mol/L).

pH = 11.85.

If pH is less than seven, solution is acidic; greater than seven, solution is basic; equal seven, solution is neutral.

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