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Calculate the hydroxide ion concentration, [OH-], in mol/L for each of the following materials: (a) citric acid, pH 2.20: ___ M (b) Household vinegar, pH 2.40:__M.

Respuesta :

Answer:

A. 1.585 x 10^-12 M.

B. 2.512 x 10^-12 M.

Explanation:

A.

citric acid: pH 2.20

pH + pOH = 14

pOH = 14 - 2.20

= 11.80

Remember, pOH = - log [OH]

[OH] = 10^-pOH

= 10^-11.8

= 1.585 x 10^-12 M

B.

Household vinegar: pH 2.40

pH + pOH = 14

pOH = 14 - 2.40

= 11.60

Remember, pOH = - log [OH]

[OH] = 10^-pOH

= 10^-11.6

= 2.512 x 10^-12 M

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