Help!!
Prepare a solution of approximately 0.1 M concentration by dissolving 0.8g of solid sodium hydroxide in 200mL of H2O. Now I have to calculate the expected mass of benzoic acid (MW=122.12) required to react with 20mL of a 0.1M NaOH solution. but I can't figure out how to do it.

Question

Help!! 
Prepare a solution of approximately 0.1 M concentration by dissolving 0.8g of solid sodium hydroxide in 200mL of H2O. Now I have to calculate the expected mass of benzoic acid (MW=122.12) required to react with 20mL of a 0.1M NaOH solution. but I can't figure out how to do it.

cuanchi · Answer

do you know the reaction between benzoic acid and NaOH?

cuanchi · Answer

C6H5COOH + NaOH ---> H2O + C6H5COO-Na+

the stoichiometry is 1mol of acid one mole of NaOH