Zinc And Hydrochloric Acid Reaction Lab Report

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1. The goal of number Lab #1 was to observe how different amounts of Zinc (Zn) will react with 15 mL of Hydrochloric Acid Solution (6 M HCl). 15 mL of 6 M HCl solution (21.5° C) was poured inside the Erlenmeyer flask. Weight of the container with this solution was 103 g. The flask was closed with a stopper (cork?) and the total weight increased to 103.161 g. 0.25 g of Zinc was added to the solution. The maximum temperature was observed at 26.5° C with the final weight of the container at 103.411 g. The same steps were repeated while adding 25 g of Zink to the solution and resulted in explosion while performed in a closed flask. Meanwhile, when the flask was not closed, 25 g of Zinc caused the solution to reach the temperature of 100°C and produce gas while reducing total mass of the container to 94.93 g.
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Temperature of the HCl in the flask was 21.5° C (same as the room temperature.)
3. Adding 25 g of Zink to HCl in a closed flask resulted in explosion.
4. Adding 25 g of Zink to HCl in an open flask did not cause an explosion. The maximum temperature of the reaction reached 100°C. Total weight of the container decreased from 103 g to 94.93 g.
5. Vial number 2 did not change colors.
6. Vial number 1 turned yellow, which is a sign of bacterial growth.
7. In vial number 1, the bacterial growth was observed because the vial was crushed, which allowed the indicator to react with the solution. Vial number 2 was not crushed, which did not allow the indicator to function properly and show any bacterial activity.
8. Experiment I: Get to know the Lab
Erlenmeyer flask (150 mL) weight (88.00 g)
Thermometer
Scale (Digital Balance)
Stopper

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