Chalk Science Experiment

Need: one piece of white chalk, glass of lemon juice OR glass of vinegar.

Set one piece of chalk aside on the table.

Using either lemon juice or vinegar, fill a glass half full with the liquid. Use a 16 oz glass if you have one.

Place the chalk in the glass. The chalk does not have to be completely covered in the liquid.

Set the glass aside for a couple of days.

The chalk should begin dissolving and then be completely dissolved in a few days.

Chalk is calcium carbonate while both vinegar and lemon juice are acidy.

The vinegar or lemon juice acidity dissolves the chalk.

You can try this experiment in school or at home using both vinegar and lemon juice.

Put a piece of chalk (or half of a piece) into a glass of vinegar.

Put the other half of the chalk (or a full piece) in a glass of lemon juice.

Which one seems to be dissolving the fastest? Or, are they both dissolving at the same pace?

Kids can also try using colored chalk in place of white chalk. Or use one white chalk and one colored chalk placed into separate glasses using either vinegar or lemon juice.

Does the colored chalk dissolve at the same rate as the white chalk?

Then try the same experiment in whatever liquid you did not use for the first experiment.

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