Question

A glass plummet weighs 14.35 g in air 5 points 11.40 g when immersed in water, and 8.95 g when immersed in sulfuric acid. Calculate the specific gravity of the acid.

Answer 1

Answer:

0.865

Step-by-step explanation:

Specific gravity is a ratio of the weight of a substance to the weight of an equal volume of a substance chosen as a standard. The standard for liquid and solids is water while for gas is hydrogen.

Amount of displaced oil = 12.64 g — 9.12 g = 3.52 g

Amount of displaced water = 12.64 g — 8.57 g = 4.07 g

Specific gravity of oil = 3.52 g / 4.07 g = 0.865

Answer 2

Specific gravity is a measure of the amount a substance is more or less

heavier than a standard substance.

• The specific gravity of the sulfuric acid is approximately 1.83

Reason:

The mass of the glass plummet in the air, m = 14.35 g

Mass of the glass in water = 11.40 g

Mass of the glass in sulfuric acid = 8.95 g

Required:

The specific gravity of the acid.

Solution:

Mass of water displaced = 14.35 g - 11.40 g = 2.95 g

Mass of the acid displaced = 14.35 g - 8.95 g = 5.4 g

The volume of the sulfuric acid and the water displaced by the glass are

the same, therefore;

Mass of water = 2.95 g

Mass of equal volume of acid = 5.4 g

$Specific \ gravity = \dfrac{Mass \ of \ acid}{Mass \ of \ equal \ volume \ of water }$

$Specific \ gravity \ of \ acid = \dfrac{5.4 \ g}{2.95\ g} \approx 1.83$

• The specific gravity of the sulfuric acid ≈ 1.83

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