Reaction of Magnesium and Calcium
Autor: Ж. Сайханаа • April 25, 2016 • Lab Report • 1,103 Words (5 Pages) • 756 Views
3. Reaction of magnesium and calcium
with water – hydroxide formation
Name …………………. Date ……… APP ..………….
INTRODUCTION
Principle
Keywords
Calcination, calcium, hydroxide formation, lime water, oxyhydrogen hydrogen evolution
Tasks
1. Evidence of hydrogen evolution and hydroxide formation
2. Quantitative decomposition of calcium hydroxide by calcination
Safety information
[pic 1][pic 2][pic 3]
Wear gloves and protective goggles!
If the amount of water that is added to the freshly calcined calcium oxide in experiment 2 is insufficient, the temperature may rise to such an extent that the pulp (caustic lime!) may splash out of the beaker due to the sudden formation of vapour. This may lead to accidents, e.g. eye injury. This is why you must always wear protective goggles when performing an experiment.
Disposal: Collect any solutions that contain heavy-metal ions in a collecting vessel for heavy-metal salt solutions. Solid residues that contain heavy metals or their ions must also be collected in this vessel.
Equipment | Substance
|
Retort stand,210 x 130 mm , h=750 mm – 1 | Magnesium powder |
Right angle clamp - 1 | Calcium granular |
Universal clamp – 1 | Calcium hydroxide |
Ring with boss head , d= 100mm – 1 | Phenolphthalein solution 0.5% in ethanol |
Wire gauze with ceramic centre, 160x160 mm – 1 | |
Glass beaker, 150 ml – 4 | |
Glass beaker, 600ml – 4 | |
Funnel – 1 | |
Test tube | |
Wash bottle | |
Spoon, steel | |
Glass rod | |
Bunsen burner |
Set-up and procedure
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