Molar Volume of a Gas Using a Eudiometer
Purpose
The purpose of this lab was to see how much volume 6.02 x 1023 gaseous particles would occupy at standard temperature and pressure by using a known amount of Mg in reaction with HCL.
Materials
* 1 gas measuring tube (Eudiometer) * 1 Ring Stand * 1 Utility Clamp * 1 Large Beaker * 1 Graduated Cylinder (10 mL) * 1 thermometer * 1 Barometer * 1 1-Hole Rubber Stopper * 10 ml of 6.0 M HCL * 1 ruler * 2.5 cm of Magnesium Ribbon * ~25 cm Fine Copper Wire
Procedure
1. Put on goggles. Measure 2.5 cm of magnesium ribbon. 2. Roll the Mg into a ball and wrap 25 cm of copper wire around the ball leaving 2.5 cm of Cu wire extended from the “case” as a “tail.” Bend the excess wire into a hook. 3. Place the utility clamp on the ring stand. Fill the large beaker 2/3 full of room temperature water. 4. Record room temperature and barometric pressure. 5. Secure the eudiometer in the utility clamp with the open end on top and with the bottom 15 cm above the base of the ring stand. 6. Measure 1- mL of HCL in a graduated cylinder and pour into the eudiometer. Then fill the eudiometer with water carefully to the top. Place the beaker full of water under the eudiometer on the base of the ring stand. 7. Hook the Cu wire over the top of the gas measuring tube so that the encased Mg is in the water in the tube. Insert the rubber stopper into the top of the eudiometer, a little water should spill over. 8. Cover the hole in the stopper with your finger and quickly invert the tube and place the stopped end of the eudiometer into the water. Secure the tube with the utility clamp with the stopper 1/2” above the bottom of the beaker. 9. Wait 5 minutes after the reaction has stopped and then tap the tube to dislodge any bubbles that may have formed. 10. Cover the hole in the stopper with you finger and pour the liquid into a large