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13 Dec 2019

A buffer solution contains 0.43 mol of hydrocyanic acid (HCN) and 0.75 mol of sodium cyanide (NaCN) in 4.80 L.
The Ka of hydrocyanic acid (HCN) is Ka = 4.9e-10.

(a) What is the pH of this buffer?

(b) What is the pH of the buffer after the addition of 0.25 mol of NaOH? (assume no volume change)

(c) What is the pH of the original buffer after the addition of 0.41 mol of HI? (assume no volume change)

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Reid Wolff
Reid WolffLv2
17 Dec 2019

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