Question

The weight of an empty 1 ml syringe is 2.1 g, and that filled with 37% phosphoric acid in water is 3.35 g. Calculate the specific gravity of phosphoric acid.

a) 1.60
b) 1.52
c) 1.27
d) 1.42

Answer 1

The specific gravity of phosphoric acid can be calculated using the weight of the filled syringe and the weight of the empty syringe. The specific gravity is found to be 1.52.

Step-by-step explanation:

The specific gravity of a substance is defined as the ratio of its density to the density of a reference substance. In this case, we can use the weight of the syringe filled with phosphoric acid and the weight of the empty syringe to calculate the specific gravity of phosphoric acid.

The weight of the filled syringe is 3.35 g, and the weight of the empty syringe is 2.1 g. The specific gravity can be calculated as:

Specific gravity = (Weight of filled syringe - Weight of empty syringe) / (Weight of empty syringe)

Specific gravity = (3.35 g - 2.1 g) / 2.1 g

Specific gravity = 1.52

Therefore, the specific gravity of phosphoric acid is 1.52, which corresponds to option b).