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The pH of a solution is 3. Its [OH^-] concentration is .........

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The pH of a solution is 3. Its [OH-] concentration is ......... 

(a) 1 × 10-3 M 

(b) 3 M

(c) 1 × 10-11 M 

(d) 11 M

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(c) 1 × 10-11 M 

It means [H+] = 10-3

[H+] [OH-] = 10-14 

[10-3] [OH-] = 10-14 

[OH-] = 10-11

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