# Ideal Gas Laws Lab Write Up

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Ideal gas law exam lab 1. purpose: to find the amount of H2 gas that is produced between a reaction of HCl acid And magnesium 2. Background: the balanced equation for magnesium reacting with an excess amount of Hydrochloric acid (HCl) is: Mg + 2HCl  MgCl2 + H2 in this lab/experiment HCl acid will be an excess so for each mole of magnesium there should be a yield of one mole of H2 gas and the magnesium will be the limited reactant. Due to the conservation of mass laws (matter cannot be lost or destroyed) as the HCl acid dissolves the magnesium there is a gas produced, theoretically it should weigh as much as the magnesium that was dissolved. Hydrogen gas (H2) is colorless, odorless and the most abundant element in the universe. Hydrogen combines with oxygen to make water which is essential to life Hydrogen gas (H2) is colorless, odorless and the most abundant element in the universe, it is less dense than air or water. The method that is going to be used to collect the H2 gas is water displacement measured in Ml. moles of H2 will be found by converting Ml to moles by dividing the number of Ml of H2O displaced by the atomic mas of magnesium (24.3 g). units that will be used for PV=nRT: p- Kpa, V- Liters, n- Moles, R- 8.31, T- kelvins. The final step will be to find the theoretical experimental yield and percent yield. The Theoretical yield should be what is the outcome that was supposed to happen in the experiment, the experimental yield is the outcome that did happen, and percent yield is found by: experimental yield/ theoretical yield X100. 3. Materials: 1.) tub with connecter tube 2.) Flask with connecter port and cap 3.) 20ml of HCl 4.) Small strips of magnesium 5.) Graduated cylinders (one long and skinny, one shorter and fat)