Molar volume of hydrogen

Chemistry

Aim: To determine the volume of Hydrogen gas is produced when Magnesium reacts with Hydrochloric acid.

Materials: Coil of Copper Wire, Hydrochloric Acid (3mol), 1.0 cm & 1.5 cm pieces of Magnesium strip. Stand and Clamp, Barometer, Thermometer, Beaker (200ml), Gas measuring tube

Method: As on the experiment sheet

Data Collection:

Table 1.1 – The Length of the Magnesium strips with corresponding volumes of Hydrogen gas produced.

Table 1.2 – Moles of hydrogen and the volume of hydrogen produced

Qualitative Observations: When attempting to wrap the copper wire around both strips of magnesium the shattered into several pieces which contribute to the uncertainties, the broke into pieces due to the size of the strips of Mg. When the Magnesium(s) was added to the Hydrochloric Acid (3mol) (l) it floated in the acid and slowly dissolve producing gas and lowering the water level of the replacing it with hydrogen gas which was being produced. While the magnesium was in the HCl it bubbled, which floated vertically to the top of the gas collecting tube. When the magnesium was first added it reacted rapidly producing bubbles at a quick rate, but as the experiment went on, the speed and bubbles became more gradual and slower until all the bubbling ceased, as the magnesium has dissolved fully. The bubbles moved in a circular motion towards to the top after popping, the gas is released into the tube.