Benzoic acid is a monobasic acid. When 1.22 g of its pure sample are dissolved in water and titrated against base, 50 ml of 0.2 M NaOH are used up. Calculate the molar mass of benzoic acid.

Benzoic acid is a monobasic acid. When 1.22 g of its pure sample are d

1.	Benzoic acid is a monobasic acid. When 1.22 g of its pure sample are dissolved in water and titrated against base, 50 ml of 0.2 M NaOH are used up. Calculate the molar mass of benzoic acid.
Answer» Solution :1000 ml of 1 MNaOHwill NEUTRALIZE acid `=(1.22)/(50xx0.2)xx1000=122 G` But 1000 ml of 1 M NaOH contain 1 mole of NaOH and will neutralize 1 mole of monobasic acid. Hence, MOLAR mass of BENZOIC acid `= 122 g"mol"^(-1)`.