Question

Question Determine the concentration of hydroxide ions for a 25 °C solution with a pH of 8.22. . Your answer should contain 2 significant figures.​

Answer 1

Answer:

$[OH^-]=1.7x10^{-6}M$

Explanation:

Hello!

In this case, since the pOH of a solution can be computed when knowing the pH as shown below:

$pH+pOH=14\\\\pOH=14-8.22=5.78$

And therefore, the concentration of hydroxide ions based on the definition of pH:

$[OH^-]=10^{-pOH}$

In such a way, we obtain:

$[OH^-]=10^{-5.78}=1.7x10^{-6}M$

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