Calculate the mass of acetic acid required to neutralize 120 g of sodium hydroxide.

Sodium hydroxide neutralization equation: CH3COOH + NaOH = CH3COONa + H2O.
Algorithm for solving the problem:
1) Calculation of the molar mass of sodium hydroxide.
2) Calculation of the amount of sodium hydroxide substance.
3) Determination of the amount of acetic acid substance according to the reaction equation.
4) Finding the molar mass of acetic acid.
5) Calculation of the mass of acetic acid by multiplying the molar mass of the acid by its amount of substance.
Solution:
1) 23 + 1 + 16 = 40.
2) 120/40 = 3 mol.
3) 3 mol.
4) 12 + 3 + 12 + 16 + 16 + 1 = 60.
5) 60 * 3 = 180g – the answer.