Lap Report

In: Science

Lab Report
By: Steven Setya 11B

Hess’s Law: Determine Heat Formation of Magnesium Oxide

To find Temperature difference/forming between MgO metal and Mg metal
My hypothesis is if Magnesium oxide has a heat formation due to the reaction with HCl, then Magnesium Metal will have a greater temperature difference.
Independent: Amount of HCl
Dependent: Temperature increase
Controlled: Amount of Mg metal and MgO metal
Manipulation Variable:
The independent variable is the amount of HCl being reacted with Magnesium Metal and Magnesium Oxide. The more the amount of HCl the faster is the reaction and we can see the amount of heat change produced from the reaction. While the Dependent is the temperature increase during the reaction from the original room temperature of the solution. When Mg or MgO is reacted with HCl, reaction occurs and temperature increase will be there. What I control is the amount of Mg and MgO that will be reacted with HCl. If there is too much the reaction won’t be a fine reaction nor vice versa.
1 Bottle with hole in lid
Beaker with 100 ml of 1 mol of HCl
0.10-0.15 grams of Magnesium
0.3-0.5 grams of Magnesium Oxide
1 Stopwatch
1 Thermometer (in Celcius)
1 Big Beeker with A lot of Cotton
2 10 ml Beeker
Experiment 1:
1. Take 0.15 grams of Magnesium Metal
2. Weigh the bottle and lid
3. Add 50ml of HCl to bottle and record new mass
4. Measure the temperature of HCl inside the bottle with cotton outside preventing heat loss for 3 Minutes and 20 Seconds in 20 second interval
5. Add Magnesium Metal to the bottle that contains 50ml of HCl and stir it, record temperature change for 6 minutes and 40 seconds and record in 20 second interval
6. Do 3 Trials
Experiment 2:
1. Take 0.5 grams of Magnesium Oxide Metal (powder)
2. Weigh the bottle and lid

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