Permanent hard water contains calcium sulfate and can be softened by the addition of sodium carbonate. What amount of sodium carbonate would have to be added to react with 150. grams of calcium sulfate? Show all work and units.
CaSO4 + Na2CO3 --> CaCO3 + Na2SO4
Question 2
2.
An airbag is a safety feature inside a vehicle that would reduce the impact of the collision on drivers and passengers in an accident. During the collision, the electric circuit passes an electrical current through a carefully measured amount of sodium azide (NaN3) to initiate its decomposition: 2 NaN3 (s) → 3 N2 (g) + 2 Na (s). N2 gas then fills the bag providing a cushion for impact.
If 45.0 grams of NaN3 were to decompose, how many liters of N2 gas would be produced? Show all work and units. (22.4 L/mol)
Question 3
3.
In nature, carbon dioxide in the atmosphere reacts with calcium hydroxide to produce calcium carbonate. If 25.0 grams of calcium hydroxide is reacted with excess carbon dioxide, how much calcium carbonate should be produced? Show all work and units.
CO2 + Ca(OH)2 --> CaCO3 + H2O
Question 4
4.
How much silver bromide can be precipitated by the reaction of 15.0 g of silver nitrate with an excess of sodium bromide? Show all work and units.