Gas Laws 1
Gas Laws 2
Concentration
Solution Extras
Solubility
100
What is the relationship between pressure and volume?
inversely proportional
100
A balloon is left outside on a hot summer day. What will happen to the volume
It will increase
100
What is the mathematical process for determining Molarity?
M = mole/Liters
100
How are pressure and solubility proportional for gases? (direct or inverse)
Directly proportional: increasing pressure increases solubility
100
2.0 g of sodium chloride can dissolve in 10.0 g of water at 30 degrees celsius. What is the solubility expressed per 100 g of water?
20.g
200
If volume and moles of gas are held constant, how will the pressure change when temp is increased?
Pressure will increase
200
As temperature decreases, and kinetic energy decreases, how does pressure change?
Pressure decreases
200
How many moles are in 2.5 L of a 10 M solution?
25 moles
200
Do the type or number of solute particles affect a colligative property more?
Number of solute particles has a bigger impact on colligative properties
200
How many gram so sodium nitrate need to be added to 100g of water at 10 degrees to saturate a solution?
80g
300
A sample of oxygen gas occupies 2.75 L at a pressure of 0.985 atm and a temperature of 22.0°C. The gas is compressed and heated until it occupies 1.80 L at a temperature of 145°C. What is the final pressure of the gas (in atm)?
2.13 atm
300
Two identical containers of gas are used to fill balloons of equal volume. Which balloon will deflate most rapidly; one filled with Helium gas, or Carbon dioxide gas?
Helium - graham's law states that lighter gases effuse and diffuse more rapidly
300
You need to prepare 500.0 mL of 0.200 M sodium carbonate (Na₂CO₃) solution for a precipitation reaction. How many grams of Na₂CO₃ must be weighed to prepare this solution?
10.6 g Na₂CO₃
300
Water is a polar solvent; which substance from this list is most likely to dissolve in water?
CH2O, C2H2, CH4
CH2O
Like dissolves like
300
At what temperature would 40 g of KCl be supersaturated if it all dissolved? 30 degrees, 45 degrees, 60 degrees
30 degress
400
A rigid 4.50 L container holds nitrogen gas at a temperature of 35.0°C. If the pressure inside the container is 2.25 atm, how many grams of nitrogen gas (N₂) are present?
11.2 g N₂
400
If I know the moles, volume and temperature of a gas, what additional variable is needed to solve using the ideal gas law?
Pressure
400
A stock solution of 3.50 M HCl is available in the laboratory. You need to prepare 250.0 mL of 0.250 M HCl for a reaction. What volume of the 3.50 M stock solution is required?
17.9 mL
400
Which of the following substances is a nonelectrolyte?
potassium nitride, carbon dioxide, calcium bromide,
carbon dioxide (covalently bonded - only nonmetals - nonelctrolyte)
400
A solution of lead nitrate is saturated at 55 degrees. How much solute precipitates out when the solution is cooled to 35 degrees?
20 grams
500
A mixture of gas has 2 moles of hydrogen, 2 moles of oxygen, and 2 moles of argon. The total pressure is 2.0 atm. What is the partial pressure of the hydrogen gas?
.67 atm
500
A gas is transferred to a container whose pressure is doubled and temperature is tripled. How does the volume change?
by a factor of 1.5
500
How many liters of 2.5M HCl are required to react with 37.0 g of NaOH (use the equation below)
HCl + NaOH --> H2O + NaCl
37.0gNaOH/39.99gNaOH = .925 mole NaOH
1 mole NaOH = 1 mole HCl
L HCl = .925 mole HCl/2.5 M HCl
.37 L HCl
500
Draw one negatively charged ion surrounded by 3 molecules of water, and one positively charged ion surrounded by 3 molecules of water
See board
500
A solution has no solid precipitate resting at the bottom. What test could you do to determine if the solution is saturated, unsaturated, or supersaturated?
Add an extra crystal of solute to solution to see if it dissolves or not. If it does not dissolve, the solution was saturated, if it does dissolve, the solution is unsaturated.