Calculate the pH of a buffer that is 0.225 M HC2H3O2 and 0.162 M KC2H3O2. The...

Calculate the pH of a buffer that is 0.225 M HC₂H₃O₂ and 0.162 M KC₂H₃O₂. The K_a for HC₂H₃O₂ is 1.8

Expert Solution

Given [ KC₂H₃O₂] = 0.162 M

[HC₂H₃O₂] = 0.225 M

K_a = 1.8x10 ^-5

pK_a = - log K_a

= - log (1.8x10 ^-5 )

= 4.74

According to Henderson-Hasselbalch equation $pH = pK_{a}+log\frac{\left [ salt]}{\left [ acid ]}$

queen_honey_blossom answered 6 months ago

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