Magnesium: Chlorine and Hydrogen Moles

ATOMIC WEIGHT OF MAGNESIUM LAB Introduction The main purpose for this experimental lab is to determine the atomic weight of magnesium, as well as an underlying purpose in determining the relationship between moles evolved and consumed. This can be demonstrated by measurement the hydrogen gas evolved by performing a chemical experiment when hydrochloric acid reacts with the magnesium. The formulated reaction includes Mg + 2HCl H2 + Mg2+(aq) + 2Cl- (aq)The major findings contributing to the experiment is be able to determine and distinguish what moles have evolved thus being the hydrogen moles evolved allowing the magnesium to be consumed within the reaction. Procedure Step 1 Obtain a 600 mL beaker, and add 300 mL of water. Step 2 Add 30 mL of HCl (2M) to the beaker, and stir. Step 3. Add 10 mg of magnesium surface to the beaker. Step 4. Allow the hydrogen gas to evolve. All of the magnesium should be consumed. Step 5. Record the amount of hydrogen gas that has evolved using the c hemical home dialog.Observations and Results Moles of hydrogen evolved 0. 000411 (4. 11 x 10-4th) moles of H2 evolved Calculated atomic weight of magnesium Weight of Mg /moles of H2 evolved 24. 305g/mol / 0. 000411 = 59,136. 25 g/mol of Mg As I continued with my experiment I came across a few observations that are important to bring to attention. As I added 10 mg of magnesium to the beaker of HCl, a shaded area appeared at the bottom of the beaker. Directly after, bubbles formed in the same beaker thus indicating the Mg was being consumed. DiscussionThe moles of hydrogen gas that have evolved during the experiment resulted in 0. 000411. The taked atomic weight of magnesium is determined by the formula of atomic weight of Mg (in grams)=weight of Mg consumed (in grams) / moles of H2 evolved, therefore the equation should be similar to this 24. 305g/mol / 0. 000411 = 59,136. 25 g/mol of Mg. This experiment is clearly a branch of stoichiometry because a reaction takes place and it is the duty of the student to calculate or determine the relative atomic mass of Magnesium. The relationship between reactants and products