Chemistry: 16. The concentration of a solution of potassium hydroxide is determined by titration with nitric acid. A 30.0 mL sample of KOH is neutralized by 42.7 mL of 0.498 M HNO3. What is the concentration of the potassium hydroxide solution?

16. The concentration of a solution of potassium

Ответ:

krystalScott17

30.01.2022

Chemistry

$M_{base}=0.709M$

Explanation:

Hello,

In this case, since the reaction between potassium hydroxide and nitric acid is:

$KOH+HNO_3\rightarrow KNO_3+H_2O$

We can see a 1:1 mole ratio between the acid and base, therefore, for the titration analysis, we find the following equality at the equivalence point:

$n_{acid}=n_{base}$

That in terms of molarities and volumes is:

$M_{acid}V_{acid}=M_{base}V_{base}$

Thus, solving the molarity of the base (KOH), we obtain:

$M_{base}=\frac{M_{acid}V_{acid}}{V_{base}} =\frac{0.498M*42.7mL}{30.0mL}\\ \\M_{base}=0.709M$

Regards.

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Ответ:

abelxoconda

07.12.2021

Chemistry

-6 is the rate of change per year

Step-by-step explanation:

The amount in dollars decrease by 6 every year.

It went from $27 to $21 to $15 and finally to $9.

Hope I helped you!!

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16. The concentration of a solution of potassium hydroxide is determined by titration with nitric acid. A 30.0 mL sample of KOH is neutralized by 42.7 mL of 0.498 M HNO3. What is the
concentration of the potassium hydroxide solution?

Ответ:

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