Question

1.7 ml of N/10 NaOH is required for titration of a 10 ml sample of milk. Compute the titratable acidity.

(a) .17 °Th

(b) 170 °Th

(c) 17 °Th

(d) 10 °Th

This question was addressed to me during an interview.

Question is from Physical Properties of Milk in section Chemistry of Milk of Dairy Engineering

Answer 1

The correct option is (c) 17 °Th

To explain: 10 x 1.7 = 17 ml would therefore be needed for 100 ml, and the acidity of the milk is consequently 17 °Th.