Calculate the pH of a solution containing 0.10 mole of acetic acid, to which is added...

Question

Question

Calculate the pH of a solution containing 0.10 mole of acetic acid, to which is added 0.03 mole of sodium hydroxide (K_a = 1.8 x 10^-5).

science chemistry

Answer 1

Answer #1

Moles of sodium acetate formed= 0.03 mol

Excess mole of acetic acid = 0.10-0.03=0.07 mol

It is acidic buffer,

pH = pKa + log(salt/acid)

= 4.74+log(0.03/0.07)

= 4.38

Answer 2

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