2013 S202 Group D An investigation on the pH solution and its effect on tooth decay.
Tuesday, 23 July 2013
Day 1 of preparation for experiment
Date: 23 July 2013
1. Crack and empty out the contents of 10 eggs. Use 2 eggs for the control
2. Rinse the eggs thoroughly.
3. Dry the eggshell with a paper towel.
4. Leave them in an empty beaker to dry
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