Specific Gravity Question - Please check my answer

I think you need to divide instead of substracting. In summary, the specific gravity of the unknown liquid is 0.943 g/ml. This was calculated by finding the density of water (1 g/ml) and the density of the unknown liquid (7.362 g/ml), and then using the equation s.g. = density of unknown / density of water to find the specific gravity. The calculated answer should be smaller than 1.000 g/ml, indicating that the unknown liquid is less dense than water.
  • #1
benworld
7
0

Homework Statement



A stoppered bottle, weights 38.215 g when empty , weights 45.362 g when filled with water. When filled with unknown liquid the bottole and unknown weighs 44.221 g. Calculate the liquid's specific gravity :


Homework Equations



D = m / v

s.g.. = density of unknown / density of water

The Attempt at a Solution



Density of water = 1 g/ml

m = 44.221 g - unknown

v = 44.21 - 38.215 = 6.00 ml

d = m /v

d = 44.221 / 6.00 = 7.362 g/ml unknown

---------------
Fiding density of water

v = 45.362 g - 38.215 g
v = 7.147
d = 45.362 / 7.147 = 6.347 g

------------

Specific Gravity

= 7.362 g/ml 6.347 g/ml = 1.160 g/ml


is the answer 1.160 g/ml ? Correct or wrong ?
 
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  • #2
Wrong. Answer has to be smaller than 1.000 g/ml.

For some reason you got mililiters when you substracted to weights.
 

Related to Specific Gravity Question - Please check my answer

1. What is specific gravity and how is it calculated?

Specific gravity is a measure of the density of a substance compared to the density of water. It is calculated by dividing the density of the substance by the density of water. The resulting number is unitless and is often represented as a decimal or a ratio.

2. Why is specific gravity important in science?

Specific gravity is important in science because it can provide information about the purity and composition of a substance. It is also used to determine the concentration of a solution and can be used to identify unknown substances.

3. How is specific gravity used in different industries?

Specific gravity is used in a variety of industries such as food and beverage, pharmaceuticals, and oil and gas. In the food and beverage industry, it is used to measure sugar content in juices and wines. In pharmaceuticals, it is used to determine the purity and strength of medications. In the oil and gas industry, it is used to measure the density and viscosity of crude oil.

4. Can specific gravity be negative or greater than 1?

No, specific gravity cannot be negative as it is a comparison of densities and cannot be less than 0. It also cannot be greater than 1 as this would mean that the substance is denser than water, which is not possible.

5. How does temperature affect specific gravity?

Temperature can affect specific gravity as it can change the density of a substance. As temperature increases, the density of a substance decreases, and vice versa. Therefore, specific gravity measurements should be taken at a consistent temperature to ensure accuracy.

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