What is the specific gravity of a liquid if a specific gravity bottle weighs 150 g empty, 250 g when filled with water, and 385 g when filled with that liquid?

To determine the specific gravity of the liquid, you first need to understand how specific gravity is calculated. Specific gravity is the ratio of the density of a substance to the density of a reference substance, typically water at 4°C, which has a specific gravity of 1.

In this scenario, the specific gravity is calculated using the formula:

[ \text{Specific Gravity} = \frac{\text{Weight of the Liquid}}{\text{Weight of the Same Volume of Water}} ]

The weight of the empty specific gravity bottle is 150 g. When it's filled with water, the total weight is 250 g. This indicates that the weight of the water alone is:

[ \text{Weight of Water} = 250 , \text{g} - 150 , \text{g} = 100 , \text{g} ]

When the bottle is filled with the unknown liquid, the total weight is 385 g. Therefore, the weight of the liquid itself is:

[ \text{Weight of Liquid} = 385 , \text{g} - 150 , \text{g} = 235 , \text{g} ]

Now, we can substitute