Prelab 2- Na Benzoate acidification (10 m) Diagram the reaction you are carrying
ID: 987010 • Letter: P
Question
Prelab 2- Na Benzoate acidification (10 m)
Diagram the reaction you are carrying out and name the reactants and products? 2m
Are the reactants both soluble in water? 1m
In the above equation what is the number of molecules of each reactant and what is the number of each of the molecular products? 1m
What do you think is the identity of the solid precipitate seen in this reaction? 1m
Which of the two products of the reaction will remain in solution ( ie will not precipitate)? 1m
How will you obtain the dry precipitate? 2m
How does this experiment mimic the action of the stomach on a food preservative? 2m
Explanation / Answer
1.Considering the acid used to be HCl
C6H5COONa + HCl==> NaCl + C6H5COOH
2. When sodium benzoate dissolved in water it dissociates as sodium ions and benzoic acid.
3. The no. of molecules of reactants and products are 1 each.
4.The solid precipitate formed in the reaction is the Benzioc acid.