Part a what is the concentration of hydroxide ions in pure water at 30.0°c, if kw at this temperature is 1.47 * 10-14? what is the concentration of hydroxide ions in pure water at 30.0°c, if kw at this temperature is 1.47 * 10-14? 1.21 * 10-7 m 1.30 * 10-7 m 1.47 * 10-7 m 8.93 * 10-8 m 1.00 * 10-7 m

Question

Leroy Bolton

Chemistry

22 June, 04:31

Part a what is the concentration of hydroxide ions in pure water at 30.0°c, if kw at this temperature is 1.47 * 10-14? what is the concentration of hydroxide ions in pure water at 30.0°c, if kw at this temperature is 1.47 * 10-14? 1.21 * 10-7 m 1.30 * 10-7 m 1.47 * 10-7 m 8.93 * 10-8 m 1.00 * 10-7 m

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Answers (1)

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Moses Sellers · Answer 1

When the solution is pure water so,

Kw = [OH-][H3O+]

when [OH-] = [H3O+] we can assume both = X

and Kw = 1.47 x 10^-14

by substitution:

1.47 x 10^-14 = X^2

∴ X = √ (1.47 x 10^-14)

= 1.2 x 10^-7 M