# Constant Density: Displacement of Zinc and Tin (Chemistry Lab)

Introduction:

Density is the concentration of molecules within an object on relation to its size. The formula for measuring density is mass/volume. In the experiment preformed for this lab report, calculating the density of a regular object (a wooden block) and two other irregular objects (zinc and tin) were found by a process known as water displacement. The purpose of this experiment was to prove that the density of an object remains the same no matter how much of it you have.

Materials:

1.

2. A wooden block

3. A graduated cylinder

4. Sink with running water

5. Ruler

6. A sample of zinc

7. A sample of tin

8. Electronic balance

9. Pencil/ pen and tables to record the data

Methods:

A. Finding the density of a regular solid

1. Measure the length, width and height of the wooden block, record the data in your table 2. Multiply the length, width, and height to find the volume of the block, record in your table. 3. Use the electronic balance to find the mass of the block. 4. Find the density of the block by dividing the mass by the volume. 5. In this experiment, the density was measured by g/cm3. B. Finding the density of a liquid

1. Measure the mass of the graduated cylinder on the electronic balance and write the number down. Remove the cylinder from the balance. 2. Fill the cylinder with 20mL of water and record this number in your data table. 3. Place the cylinder with the water in the electronic balance, this number will be the mass of the cylinder and the water, however, only the mass of the water is needed so you must subtract the mass of the cylinder from the first step. 4. Divide the mass by the volume of the water so you are left with the density of the water. Record this number in your data table rounded to the nearest whole number. 5. Repeat steps 2-4 with 40mL and then 60mL of water.

6. Use the data...

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