Core prac 1 - measuring molar volume of a gas Flashcards
1
Q
Method
A
place 30 cm3 of 1moldm-3 ethanoic acid in a boiling tube
place approx 0.05g calcium carbonate in test tube and weigh out
put calcium carbonate in boiling tube with acid and bung it
do the ting with water bath and measuring cylinder
reweight test tube after calcium was added for a known amount added
repeat 6 times until 0.40g
2
Q
safety
A
wear eye protection
dont let the acid touch you
3
Q
what are you measuring
A
the CO2 produced in the reaction that is measured by the displacement of water in the measuring cylinder
4
Q
what is the main source of error and how can it be fixed
A
gas loss before replacing bung
use tube containing both reactants that can tip to mix them
