The major findings of this experiment were that there was a chemical reaction teens hydrochloric acid and magnesium, and the reaction produced the hydrogen gas. The results also indicated how many moles of hydrogen gas were equal to the amount of moles of magnesium consumed. Procedure Step 1: Obtain a 600 ml beaker and add 300 ml of water. Step 2: Add 30 ml of hydrochloric acid (MM) to the beaker and stir. Step 3: Add 10 MGM of magnesium metal to the beaker. Step 4: Allow hydrogen gas to evolve. All of the magnesium should be consumed.
Step 5: Record the amount of hydrogen gas evolved using the chemical property logo. Observations and Results Moles of hydrogen evolved: 0. 000411 moles / 0. 000829 g Calculated atomic weight of magnesium: 0. 000411 g During my observation I noticed that when 10 MGM of magnesium metal was added to the beaker, a shaded area appeared on the bottom of the beaker. When the bubbles stopped and the shaded area disappeared, it indicated that the magnesium had been consumed. Discussion In order to measure the atomic weight of magnesium after it is consumed, it has to be mixed with hydrochloric acid.
Once it has consumed it will produce hydrogen gas, which will be trapped and measured. This means that the atomic weight of magnesium will result from separating the hydrogen gas from the acid in the magnesium. The chemical equation mentioned in the introduction indicates that one mole of hydrogen gas is produced for every mole of magnesium that reacts. In this lab, there sis 1:1 ratio between the number of moles of hydrogen gas evolved and the number of moles of magnesium consumed in the reaction.
Therefore, the number of moles of hydrogen gas evolved is equal to the number of moles of magnesium consumed. The atomic weight of magnesium is equal to the weight of magnesium consumed per moles of hydrogen gas evolved. Conclusion In conclusion, a chemical reaction occurred when the hydrochloric acid and magnesium were combined. The result, hydrogen gas, indicated how many moles of hydrogen gas were equal to the amount of moles of magnesium consumed.