Question

Determine the amount of acid you need to weight, assuming that the molar mass is 150g/mol, its a monoprotic acid and 15 ml (0.100M) of the titration agent are needed to reach the end point. Remember significant figures and units.

Answer 1

Solution

First we need to calculate the mol of acid

Mol of acid = Molarity × Volume

Where, Molarity = 0.100 M = 0.100 mol / L, Volume = 15 mL = 0.015 L

Putting these values in the above equation then we get

Mol of acid = 0.100 mol/L × 0.015 L = 0.0015 mol

So,

Weight of acid = mol of acid × molar mass of acid

Weight of acid = 0.0015 mol × 150 g/ mol = 0.225 g