Answer to Question #89367 in General Chemistry for Keraine

Question

Calculate the concentration of the vinegar used if 75cm3 vinegar reacts completely with 60cm3 of NaHCO3 solution of concentration 0.1mol.dm3 .the equation for the reaction
CH3COOH+NaHCO3-CH3COONa+H20+CO2

Answer 1

As 1 dm³ = 1 l, the molarity of NaHCO₃ is c = 0.1 mol/l.

Let`s convert cm³ into l.

75 cm³ = 0.075 l; 60 cm³ = 0.06 l;

Now, we will count the amount of NaHCO_3.

n(NaHCO₃) = c * V = 0.1 mol/l * 0.06 l = 0.006 mol.

n(CH₃COOH) = n(NaHCO3) = 0.006 mol.

c(CH3COOH) = n/V = 0.006 mol / 0.075 l = 0.08 mol/l = 0.08 mol/dm³.