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- 1. Multiple Choice
What is the molar mass of lithium carbonate?
73.89 g/mol
105.99 g/mol
138.21 g/mol
100.09 g/mol
- 2. Multiple Choice
What type of chemical reaction was responsible for the production of the calcium carbonate?
synthesis
decomposition
single replacement
double replacement
- 3. Multiple Choice
Consider the chemical reaction between calcium chloride and the unknown metal carbonate, which of the following are the spectator ions in the solution?
Unknown metal cations
chlorides
calcium cations
both the unknown metal cations and chlorides
- 4. Multiple Choice
What would happen to the calculated molar mass if some precipitate seeped through the filter paper?
molar mass would be too high
molar mass would be too low
There would be no effect on the molar mass
The mass of the precipitate collected would decrease
- 5. Multiple Choice
If a student forgot to cover their experiment with parafilm over the weekend before they filtered their product, how would that affect the calculated molar mass?
molar mass would be too low
molar mass would be too high
molar mass would be unaffected
molar mass would certainly double
- 6. Multiple Choice
If your clumsy lab partner spilled some of your precipitate during the filtering process, how would that affect your calculated molar mass?
molar mass would be too low
molar mass would be too high
molar mass would be unaffected
there would be less filtrate collected
- 7. Multiple Choice
Which of the following is the net ionic equation for the production of calcium carbonate?
Ca+ + 3CO ----> CaCO3
Ca+2 + CO3-2 ----> CaCO3
M+2 + Ca + CO3-2 ----> MCaCO
M+2 + Cl- ----> MCl2
- 8. Multiple Choice
If you failed to heat the crucible enough times for the masses to be consistent, why would that cause your calculated molar mass to be too high?
the presence of water causes the mass of the unknown carbonate to be too high
the moles of calcium carbonate increases
the mass of the unknown carbonate will be too low
the moles of the unknown carbonate will be too high
- 9. Multiple Choice
Which equipment was not needed to conduct this lab?
hot plate
ring stand
Bunsen burner
analytical balance
- 10. Multiple Choice
What is the molar mass of calcium carbonate?
73.89 g/mol
100.09 g/mol
105.99 g/mol
138.21 g/mol
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