Chemical Reactions Lab Report

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The Examination of Chemical Reactions in Multiple Chemical Compounds to Identify Types of Energy Changes and Types of Reactions The purpose of this lab is to investigate chemical reactions that takes place between different chemical compounds. The products formed through these reactions will be observed for physical properties and chemical changes. Pour 100 mL of citric acid into an Erlenmeyer flask. Fill a clay crucible with baking soda. Measure and record the temperature of the citric acid solution. Add baking soda into Erlenmeyer flask until the reaction stops. Measure and record the temperature of the citric acid and baking soda solution, transferring no liquid. Fill half a test tube with limewater. Pour off the gas at the surface of the Erlenmeyer flask into the test tube half filled with limewater. Stopper and shake the test tube. Experiment B: Pour hydrogen peroxide until the test tube is 1/3 full. Measure the temperature of the solution. Add a small amount of manganese IV oxide to the solution, and stopper the test tube. Perform a gas test with a splint. Measure the temperature of the solution. There are several safety procedures that were taken throughout the performance of this lab. Firstly, …show more content…

The sodium bicarbonate separates and reacts with the citric acid. The result product of this is carbonic acid (H2CO3 (aq)). However, carbonic acid by itself is not stable, so it decomposes into water, carbon dioxide, and sodium citrate. This results in bubbles of CO2 being formed. The reaction is endothermic because it absorbs heat and energy (does not occur spontaneously). The bond energies of the products are less than the bond energies of the reactants, thus, more energy is required to break the bonds in the reactants, rather than energy that is released when the product is formed. As a result, the temperature

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