Given 20g of benzoic acid contaminated with 0.4g of salicytic acid.

Question

1)Determine the volume of hot water required to dissolve the mass of acid.
2)Calculate the mass of benzoic acid which participates when the solution is cooled to 20°C. Deduce.
3)Calculate the mass of salicylic acid which co-precipitated with the mass of benzoic acid.
Solubility(g/100ml)
At 20°C : Benzoic acid: 0.29
Salicylic acid: 0.22
At 100°C: Benzoic acid: 6.8
Salicytic acid: 6.67

Answer 1

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