Lab Investigation : Identifying Mystery Gases
Purpose : To use chemical tests (burning and/or glowing splint tests) in the identification of gases
produced in each of three different chemical reactions.
Hypothesis : The identity of a gas produced in each chemical reaction will be possible by matching the
observations of the splint test to the known chemical properties of each gas:
i)
ii)
iii)
Carbon dioxide gas : extinguishes flame from a burning splint;
Hydrogen gas : explosive, often generating sound energy or light energy when combusted
with a burning splint;
Oxygen gas : highly combustible, able to re-light a glowing splint.
Materials : See the list of Materials on Pg. 56 of the textbook
Procedure : Follow the instructions for Part 1, Part 2, and Part 3 (skip steps 10 and 11) as written on
Pgs. 56-57 in the textbook.
Observation Table - Part 1 : Hydrogen Peroxide and Manganese Dioxide
Observations of Reactants
Observation of Reaction
Burning Splint
Test Result
Glowing Splint
Test Result
Observation Table – Part 2 : Hydrochloric Acid and Magnesium
Observations of Reactants
Observation of Reaction
Burning Splint
Test Result
Glowing Splint
Test Result
Observation Table – Part 3 : Hydrochloric Acid and Sodium Bicarbonate
Observations of Reactants
Observation of Reaction
Burning Splint
Test Result
Glowing Splint
Test Result
Analysis and Communication : Answer #13 (a), (b), (e), (f) and #14 from Pg. 57
13a)
13b)
13e)
13f)
14.
Gas
CO2
H2
O2
Conclusion :
Physical Properties
Chemical Properties