3 years ago

Help me please.... and Thankyou

Chemistry

1 answer:

stealth61 [152]3 years ago

6 0

The answer is B. because it starts at Conifer Seeds and ends at Northern goshawks.

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JulsSmile [24]

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Be sure to answer all parts. Calculate the pH of the following two buffer solutions: (a) 1.4 M CH3COONa/1.6 M CH3COOH. (b) 0.1 M

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Answer:

a) pH = 4.68 (more effective)

b) pH =4.44.

Explanation:

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$pH =pKa +log\frac{[salt]}{[acid]}$

a) pKa of acetic acid = 4.74

[salt] = [CH₃COONa] = 1.4 M

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$pH = 4.74 + log \frac{1.4}{1.6}= 4.68$

This is more effective as there is very less difference in the concentration of salt and acid.

b) pKa of acetic acid = 4.74

[salt] = [CH₃COONa] = 0.1 M

[acid] = [CH₃COOH] = 0.2 M

$pH = 4.74 + log \frac{0.1}{0.2}= 4.44$

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sergiy2304 [10]

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