How Might You Demonstrate the Law of Conservation of Mass for Melting Ice?

Ice cubes have the same mass as water once they melt.
••• Comstock/Comstock/Getty Images

The Law of Conservation of Mass states that substances involved in chemical reactions do not lose or gain any detectable mass. The state of the substance, however, can change. For instance, the Law of Conservation of Mass should prove that an ice cube will have the same mass as the water that forms as the cube melts. Perform this experiment to prove the law to your fellow students, and to prove to your teacher, that you understand the theory behind the law.

    Zero out your balance scale to ensure its accuracy. The scale is zeroed when the end of the triple beams is hovering directly in the middle of the scale. Use the weights to help you do this.

    Weigh the plastic dish. The weight of the dish will be your constant.

    Place the ice cube in the dish and weigh the dish and cube together. Subtract the weight of the dish from the final number to find the mass of the ice cube. Remove the dish from the scale.

    Let the ice cube melt completely. Place the dish back on the scale to find the mass of the dish and the water that's now taken the ice cube's place. According to the Law of Conservation of Mass, the weight of the cube and of the water should be the same.

    Things You'll Need

    • Balance scale
    • Ice cube
    • Small plastic dish
    • Pencil
    • Paper

Related Articles

How to Measure Heat of Fusion of Ice
How to Calculate the Volume for Ice
How to Determine Density
How to Calculate the Mass of a Solid
How to Convert Mass to Density
How to Measure Solubility for a Science Project
How to Calculate Molarity (M) in Chemistry
Why Rubber Floats in Water
How to Calculate Joules of Heat
How to Create a Justice Scale
The Five-Step Process for Finding Density
How to Find Mass Percentage
How to Calculate the Weight of an Object
How to Find the Mass on a Triple Beam Balance
How to Calculate E = MC2
What is a Double-Pan Balance Scale?
How to Use an Electronic Balance
The Differences Between Mass & Weight for Kids
How to Measure Mass & Density
How to Calculate Density of Sugar Water

Dont Go!

We Have More Great Sciencing Articles!