Order Stoichiometry Lab Assignment
Stoichiometry Lab – The Chemistry Behind Carbonates reacting with Vinegar
Objectives: To visually observe what a limiting reactant is. To measure the change in mass during a chemical reaction due to loss of a gas. To calculate CO2 loss and compare actual loss to expected CO2 loss predicted by the balanced chemical equation.
Materials needed: Note: Plan ahead as you’ll need to let Part 1 sit for at least 24 hours.
plastic beaker graduated cylinder
electronic balance 2 eggs
1 plastic cup baking soda (5 g)
dropper vinegar (500mL)
2 identical cups or glasses (at least 500 mL)
Safety considerations: Safety goggles are highly recommended for this lab as baking soda and vinegar chemicals can be irritating to the eyes. If your skin becomes irritated from contact with these chemicals, rinse with cool water for 15 minutes.
The reaction between baking soda and vinegar is a fun activity for young people. Most children (and adults!) enjoy watching the foamy eruption that occurs upon mixing these two household substances. The reaction has often been used for erupting volcanoes in elementary science classes. The addition of food coloring makes it even more fun. The reaction involves an acid-base reaction that produces a gas (CO2). Acid-base reactions typically involve the transfer of a hydrogen ion (H ) from the acid (HA) to the base (B−):
HA B− –> A− BH (eq
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