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charle [14.2K]
3 years ago
15

What is the hydroxide ion concentration of a solution whose pOH is 6.42?

Chemistry
1 answer:
Sergeeva-Olga [200]3 years ago
7 0

Answer : The hydroxide ion concentration of a solution is, 3.8\times 10^{-7}M

Explanation :

As we know that:

pH : It is defined as the negative logarithm of hydrogen ion concentration.

Mathematically,

pH=-\log [H^+]

Similarly,

pOH : It is defined as the negative logarithm of hydroxide ion concentration.

Mathematically,

pOH=-\log [OH^-]

Given:

pOH = 6.42

6.42=-\log [OH^-]

[OH^-]=3.8\times 10^{-7}M

Therefore, the hydroxide ion concentration of a solution is, 3.8\times 10^{-7}M

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Hi, the question has some missing part. The complete question should be " If the pK_{a} of HCHO_{2} is 3.74 and the pH of an HCHO_{2}/NaCHO_{2} solution is 3.89, it means that -

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