Question

5g of weak acid is dissolved in 600cc of water.I f 25% of acid is dissociated.What will be the depression in fp

Answer 1

Answer:

Answer -

∆Tf = 0.0129 ℃

● Explanation -

W2 = 10^-3 kg = 1 g

M2 = 60 g/mol

W1 = 600 cc = 600 g

α = 25% = 0.25

# Solution -

Depression in freezing point is calculated by -

∆Tf = 1000.i.Kf.W2 / M2.W1

∆Tf = (1000 × 0.25 × 1.86 × 1) / (60 × 600)

∆Tf = 0.0129 ℃

Therefore, depression in freezing point will be 0.0129 ℃.