In this project, students will dissolve eggshells in an acid to measure the mass loss. This will help to estimate the calcium carbonate content in the eggshells.
If eggshells are dissolved in acid, then the mass loss will indicate the calcium carbonate content.
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Clean and dry the eggshells, then measure their initial mass.
Crush the eggshells into small pieces and place them in a beaker.
Add 100 ml of vinegar to the beaker containing eggshells.
Stir the mixture gently and allow it to sit for 24 hours.
After 24 hours, filter the solution to separate undissolved particles.
Dry the remaining solid matter and measure the final mass.
Calculate the mass loss to estimate calcium carbonate content.
Repeat the experiment for accuracy and record all observations.
The eggshells will lose mass after reacting with the acid, indicating the presence of calcium carbonate. The mass loss can be used to estimate the calcium carbonate content.
Amount of vinegar
Mass loss of eggshells
Temperature, Time of reaction, Initial mass of eggshells
Wear safety goggles and gloves when handling acids. Ensure good ventilation during the experiment.
Include diagrams showing the chemical reaction.
Display before and after images of the eggshells.
Use graphs to illustrate mass loss data.
Vinegar contains acetic acid, which reacts with calcium carbonate in eggshells.
Repeat the experiment multiple times and take the average of the results.
Eggshells are primarily composed of calcium carbonate.
