Calculate the pH of a buffer that is 0.158 mol ["HClO and 0.099 mol L"Nacio. The...

Question

Question

Answer 1

Answer #1

According to Henderson Hassselbatch Equation

pH= pKa + log [dissociated]/[undissociated]

Ka = 2.9 X 10 ^-8

for pKa = - log (Ka)

= -log 2.9 X 10 ^-8

= 7.53

conc of dissociated =0.099 mol L-1

conc of undissociated =0.158 mol L-1

log [dissociated]/[undissociated] = -0.203

Putting in , pH= pKa + log [dissociated]/[undissociated]

=7.53 -0.203

= 7.327

Answer 2

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