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Salt of Weak Acid and Strong Base

ph of solutio...

Question

ph of solution containing acetic acid -pka=4.76and NH4OH pkb=4.75

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Solution

Acetic acid is a weak acid and ammonium hydroxide is a weak base and on mixing these solutions the pH of the mixture is given by
pH = ½[pK_w+pK_a-pK_b]

pK_a= 4.76 pK_b=4.75

pH=½ [14+4.76-4.75]=3.505= 7.005

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p K_{a}

of acetic acid and

p K_{b}

N H_{4} O H

4.76

4.75

. Calculate the

p H

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p k_{a}

of acetic acid and

p K_{b}

of ammonium hydroxide are 4.76 and 4.75 respectively. Calculate the pH of ammonium acetate solution.

Q. A buffer solution contains 0.1

M

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p K_{a}

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?

p K_{a}

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solution of ammonium acetate is diluted by adding

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Salt of Weak Acid and Strong Base

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