3 years ago

A smaller gear driving a larger gear gives a blank advantage (called blank gears)

Chemistry

1 answer:

charle [14.2K]3 years ago

6 0

Jduddhhdid sewer feeder dad

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Katyanochek1 [597]

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A solution is prepared at that is initially in benzoic acid , a weak acid with , and in sodium benzoate . Calculate the pH of th

Kisachek [45]

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$pH=4.1$

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In this case, for a concentration of 0.42 M of benzoic acid whose Ka is 6.3x10⁻⁵ in 0.33 M sodium benzoate, we use the Henderson-Hasselbach equation to compute the required pH:

$pH=pKa+log(\frac{[base]}{[acid]} )$

Whereas the concentration of the base is 0.33 M and the concentration of the acid is 0.42 M, thereby, we obtain:

$pH=-log(Ka)+log(\frac{[base]}{[acid]} )\\\\pH=-log(6.3x10^{-5})+log(\frac{0.33M}{0.42M} )\\\\pH=4.1$

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A smaller gear driving a larger gear gives a blank advantage (called blank gears) ￼

A smaller gear driving a larger gear gives a blank advantage (called blank gears)