the goal:

To explain how to make soap at home.

Materials and tools:

Water sample 1 - Water sample 2 - Distilled water - Dropper - 3 test tubes with stoppers - Coloring pencil - Dishwashing liquid - Test tube rack.

Steps:

1- Take a quantity of distilled water and place it in test tube D, repeat the step with water sample 1 and 2.

2- Add a drop of dishwashing liquid to the three tubes.

3- Using the coloring pencil, mark the height of the water in each tube.

4- Use the stoppers to seal the three tubes.

5- Shake each tube for a period of time, then measure the height of the foam in each tube.

Note:

We observe a difference in the amount of foam formed in the three tubes.

Conclusion:

We conclude that it is possible to distinguish between hard water and soft water by mixing it with a cleaning solution.

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