chem question moles

hi, please could i have help on this question? i have no clue where to start!
here is the question: https://app.gemoo.com/share/image-annotation/617960668460691456?codeId=MlQxWlZGbbkqX&origin=imageurlgenerator
thanks!

Reply 1

Scanjo63

5

tartaric acid has 2 carboxyl groups and two alcohol (hydroxyl) groups, 2 x sodium will react with the carboxylic acid carboxyl groups and sodium will also react with alcohols to form alkoxide ions, since tartaric acid has two hydroxyl (alcohol) groups another x2 sodium will react with these

Reply 2

anonymous294

OP

11

Original post by Scanjo63

tartaric acid has 2 carboxyl groups and two alcohol (hydroxyl) groups, 2 x sodium will react with the carboxylic acid carboxyl groups and sodium will also react with alcohols to form alkoxide ions, since tartaric acid has two hydroxyl (alcohol) groups another x2 sodium will react with these

Thank you! Just to confirm on the internet it says alkoxide ions are formed from the reaction between alcohols and bases so is this why it has to be 2NaOH so the OH makes it a base?