Density Lab

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Northern Virginia Community College *

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Apr 3, 2024

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DENSITY 1 Density Mustafa Al- Timimi Dr. Fatma Mohy El-Din 09/12/2023 NOVA
DENSITY 2 Introduction The purpose of this experiment is to learn how to calculate the density of unknown liquids and objects. In order to determine the density of certain materials, the mass and volume are needed. Mass is calculated based on the weight of the objects used in an experiment. A solid’s mass can simply be known by weighing it on a scale or an electronic balance. If the solid is several pieces, pouring it into a container, weighing the container, and then subtracting the weight of the container also gives you the mass of the solid. A liquid’s mass can also be known by using the same steps, weighing the container without the liquid, then with the liquid, and subtracting the container’s weight. Determining the volume of a liquid is simple as a liquid’s volume is the same as the volume of the container it is poured in. For solids you would need to have both the solid, and a liquid in a container, then subtract the volume of the container and liquid to get the solid’s volume. The formula for Density is, D= M/V. Materials Erlenmeyer flask + stopper Deionized water Unknown Liquid Unknown Solid
DENSITY 3 Procedure 1. A flask with its stopper was weighed, the weight measured was 29.719g. Deionized water was poured into the flask and weighed, the weight was 58.270g. The mass of water was obtained by subtracting the weight of the flask with water with the flask empty with its stopper. The mass of water was determined to be 28.551g. 2. The density of water was determined by using a chart which uses the temperature to know the density of the water. As liquids have the same exact volume as their container, the flask’s volume can be known by diving the mass of water with its density, 28.551/0.997296= 28.62841122g. 3. The unknown liquid’s mass was known by using the same procedure that the water had been measured with. Filling up the flask with the known liquid and then subtracting the weight of the flask with the liquid, with the weight of the flask as it is, 53.416-29.719= 23.697. The volume remains the same as water since it is a liquid. The density is simply taken from the mass of the unknown liquid divided by the volume of the flask, 23.697/28.6284122= 0.8277441531. 4. Determining the solids mass is like the steps used to getting the mass of liquids, weighing the flask with the solid inside and subtracting the weight of the flask with the solid, with the weight of the flask empty, flask with solid= 49.123- 29.719 (empty flask) = 19.404g. 5. Filling up the flask with both water and the solid will help determine the density and volume of the solid as its volume is fixed. The weight of the flask+ solid+ water is 74.921g. The mass of the water with the solid is known by subtracting its weight with the flask and solid with no water, 74.921- 49.123= 25.798g. The volume of the water inside
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