the ph of a buffer solution containing 0.2 mole per litre CH3COONa and 1.5 mole per litre CH3COOH is(Ka for acetic acid is 1.8 x 10^-5)
Asked by laks78
31st October 2018,
12:29 AM
Answered by Expert
Answer:
from Henderson equation of acidic buffer solution we know,
pH = pKa +log [A-]/[salt]
degree of ionization (∞) = √Kc/C = 3.4e-3
So, [CH3COO-] = C∞ = 3.4e-3 × 1.5 = 5.2e-3
So, pH = 4.7 + log [5.2e-3]/0.2 = 4.7 + log 0.026 = 4.7 - 1.58 = 3.115
Answered by Expert
31st October 2018,
1:24 AM
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