What is product of addign NaOH, Ca(OH)2 to these molecules?

A) para-hydroxybenzoic acid + a) NaOH
b) Ca(OH)2
B) para-aminobenzoic acid + Ca(OH)2

Need it ASAP

1 Answer
Aug 5, 2017

Here's what I expect to happen.

Explanation:

A) 4-hydroxybenzoic acod

1. #"NaOH"#

The #"NaOH"# will first neutralize the stronger carboxylic acid and then the weaker phenol group.

#"HOC"_6"H"_4"COOH(aq)" + "2NaOH(aq)" → "NaOC"_6"H"_4"COONa(aq)" + "2H"_2"O(l)"#

2. #"Ca(OH)"_2#

I would expect the calcium salt to be insoluble, so only the carboxyl group would be neutralized.

#"2HOC"_6"H"_4"COOH(aq)" + "Ca(OH)"_2"(aq)" → ("HOC"_6"H"_4"COO")_2"Ca(s)" +"2H"_2"O(l)"#

B) 4-Aminobenzoic acid

Again, I would expect the calcium salt to be insoluble.

#"2H"_2"NC"_6"H"_4"COOH(aq)" + "Ca(OH)"_2"(aq)" → ("H"_2"NC"_6"H"_4"COO")_2"Ca(s)" +"2H"_2"O(l)"#