A sample of orange juice is found to have a PH of 3.80. What is...

Chemistry

JAMB 2017

A sample of orange juice is found to have a PH of 3.80. What is the concentration of the hydroxide ion in the juice?

A. 1.6 \(\times\) 10^-4
B. 6.3 \(\times\) 10^-11
C. 6.3 \(\times\) 10^-4
D. 1.6 \(\times\) 10^-11

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Correct Answer: Option B

Explanation

P^H = - Log[ H⁺ ]

P^H + P^OH =14

P^OH = 14 - 3.8

P^OH = 10.2

P^OH = - Log[ OH^- ]

10.2 = - Log[ OH^- ]

10^-10.2 = [ OH^- ]

[ OH^- ] = 6.3 x 10^-11

There is an explanation video available below.

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A sample of orange juice is found to have a PH of 3.80. What is...

Correct Answer: Option B

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