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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: greentalk2012 on January 24, 2013, 05:31:12 PM

Title: Synthesis of Aspirin
Post by: greentalk2012 on January 24, 2013, 05:31:12 PM

In the first part of synthesis of Aspirin there was a base catalysed(NaOh) hydrolysis of 2 hydroxybenzoic acid and disodium salt formed,after addition of H2So4 crude product of salicylic acid precipitated,so, it precipitated because salicylic acid has lower solubility in water than disodium salt but how and why H+ outcompeted Na+?
Thanks

Title: Re: Synthesis of Aspirin
Post by: Hunter2 on January 25, 2013, 08:20:16 AM

It is because sulfuric acid is a strong acid and salicylic acid is a weak one. The strong one cast out the weak one from there salt.