J.R. S. answered 04/08/22
Ph.D. University Professor with 10+ years Tutoring Experience
Sodium hydroxide = NaOH
Oxalic acid = HOOC-COOH (a dicarboxylic aicd; has 2 acidic hydrogens)
The balanced equation for complete reaction of these two is as follows:
HOOC-COOH + 2 NaOH ==> NaOOC-COONa + 2 H2O ... balanced equation