Gas Law Determination of Molecular WeightPaula MoltzanBryan Novas L-4211.30.2017The purpose of this lab is to determine the molecular weight of a metal using the ideal gas law by exposing one of three metals to hydrochloric acid, then measuring the amount of hydrogen gas produced. Aluminum, magnesium, and Zinc are electropositive metal that react with strong acids to produce hydrogen gas, we are able to determine the number of moles of hydrogen gas in a controlled condition using the Ideal Gas Law. The first step in this experiment is to obtain a specific metal from the TA, and then weigh it to make sure it’s below the max weight. Then, wrap the sample in copper wire, bending the wire at the end of the handle to make a hook and a handle. Next, fill a 600-mL beaker with about 400-mL with water. Set up a ring stand and burette clamp to hold the eudiometer in place with the open end up. All of the metals require ~10 mL of 6 M HCl to react, pour the acid into the eudiometer using the markings on it to determine the volume of HCl added. Then proceed to fill the eudiometer with water to the top,make sure it is slowly decanted. Next, insert the metal sample into the eudiometer and pin the copper wire to the side of the eudiometer by inserting a 1-holed rubber stopper with a piece of glass tubing in it into the eudiometer. Cover the hole in the glass tubing with your finger, turn theeudiometer over and place it in the 600-mL beaker so that the opening is submerged in the water. When the acid reaches the metal, it will start to react with the metal generating the hydrogen gas. Allow the reaction to proceed until no metal is left and no further gas is being formed. After the reaction is complete record the temperature, gas volume, barometric pressure and the difference in the height of the two water levels. Now, disassemble the apparatus and add the acid solution inthe eudiometer to the 600-mL beaker filled with water and neutralize it and put it in the drain. Repeat this entire procedure for a total of three trials of your assigned metal sample. Safety glasses and gloves are required at all times during this experiment. Sodium hydroxide is corrosive, handle with care and if you spill any let your TA know. Any remaining metal samples must be disposed of in the solid waste container and make sure you neutralize the HCl solution with NaOH before pouring down the sink, follow with a thorough water rinse. Solutions of pH≤5or pH≥9 should never be disposed of down the drain and neutralized solutions have a pH between 6 to 8, 6≥pH≤8. You can check the pH by using the litmus