Lab: #1
Date:
Title: Density
Aim: To Determine the density of an irregular shaped object(stone)
Apparatus and Materials: Eureka can, measuring cylinder, water, string, triple beam balance,
irregular shaped object(stone)
Diagram of Apparatus:
Method:
1. The mass of the atoms were taken using the triple beam balance. The mass was then
recorded
2. The eureka can was filled with water and allowed to drain on a levelled surface
3. The spout of the eureka can was placed into the measuring cylinder and the stone, which
was tied to a string and lowered into the cylinder until it was fully immersed in the water
4. The volume of the displaced water was measured and recorded
Variables:
Manipulated:Volume of water in eureka can
Responding:Volume of water displaced
Controlling:Mass of stone
Results:
Table Showing Results Obtained From The Experiment
Stone Mass/g
Displaced liquid/cm3
Density of stone/gcm-3
212.7
9.3
4.4
42.7
9.8
4.4
Data Analysis: Density is a measure of how close particles of a substance are packed together, it
is calculated using the equation:
Density= mass ÷ volume = 42.7g ÷ 9.8cm3 = 4.357 g cm-3
4.4 g cm-3
Therefore the density of the stone is 4.4cm-3
To find the relative density = Density of object ÷ Density of water
Density of stone= 4.4 g cm-3
Density of water= 1 g cm-3
Relative density= 4.4 g cm-3 ÷ 1 g cm-3
Relative density of stone= 4.4
Source of Error:
1. Air pressure may have affected the stone’s mass while weighing it on the balance
2. The eureka can was placed on a unlevel surface
Precautions:
1. Ensure the balance is at zero for accurate measurement
2. Ensure the string is tied tightly to the stone
Conclusion: The density of the stone was found to be 4.4 g cm-3