Exothermic Reaction Lab Report

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Type of reaction that is occurring
There are two reactions in the hydrogen pop test. The first is a single replacement reaction which is exothermic as it releases heat. It happens when the Calcium swaps with the hydrogen. The reaction is also a metal/acid reaction.
The reaction is a single replacement reaction because one caption replaces another. Y + AX ---> YX + A. A and Y are both positively charged and therefore they cannot balance each other out. The charge of Calcium is +2 and the charge of Nitric Acid is -1. Therefore when the reaction occurs to you need to Nitrate atoms to balance out Calcium Nitrate. When the hydrogen is separated to form the single replacement reaction it becomes H₂ because in nature it is only found as a diatomic …show more content…
A combustion reaction results in the release of heat energy which is an exothermic reaction. (Why the exothermic reaction occurs above).
The reaction is a combination reaction because the two reactants combine to form one product which water vapour. X+Y -> XY. This is because the Hydrogen gas and oxygen combine and form water vapour along with heat.
Balanced Chemical Equation
Metal/Acid: Ca (s) + 2HNO₃ (aq) -> Ca(NO₃)₂ (aq) + H₂ (g)
Molar Mass: 40.078 g/mol + (2+28+96) 126g/mol -> 164.088 g/mol + 2 g/mol therefore the reaction is balanced out because there is the same amount of products and reactants in mass.
Combustion: 2H₂ (g) + O₂ (g) -> 2H₂O (g) (+Heat)
Molar Mass: 4 g/mol + 32 g/mol -> 4 g/mol + 32 g/mol therefore the reaction is balanced out because there is the same amount of products and reactants in mass.
Balanced Word Equation
Metal/Acid: Calcium (s) + Nitric Acid (aq) -> Calcium Nitrate (aq) + Hydrogen gas (g) (+ …show more content…
Although there were some issues. In the first lesson our methods and experiments weren’t working and we were unable to get the pop. This could be due to the lack of research we had done at the start and that we tried to rush the experiment towards the end of the lesson. Also the next time we attempted the Hydrogen Pop test after some research it worked successfully resulting in a pop. This is because in the second lesson we knew what we were doing and how the previous tests could be improved.
At first we held the test tube over the conical flask to get the gas from the reaction and then putting a finger over the test tube to keep the gas in which didn’t work. We changed from this method as it could be quite dangerous for the person’s hands. We also tried the water method and it didn’t work as it was slightly rushed in the first lesson. We improved by using a retort stand to hold the test tube and applying a stopper and tube. We also improved our experiment by adding a bit more nitric acid and
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