Laws
Oxygen and chlorine gas are mixed in a container with partial pressures of 401 mmHg and 0.639 atm, respectively. What is the total pressure inside the container?
1.17 atm or 886.64 mmHg
must convert to one or the other
What is the molarity of the solution given that 1 gram of potassium fluoride is dissolved to make 0.10 L of solution?
0.17 M
(convert KF to moles = 0.0172)
Which compound becomes a strong electrolyte when dissolved in water?
A) Br2
B) Li(OH)2
C) CH3CH2CH2OH
D) C6H12O6 (glucose)
Li(OH)2
Kc is larger than one when...
The products are favored
How many liters are in 1 mole of gas at STP?
22.4
A balloon is filled with 35.0 L of helium in the morning when the temperature is 20ºC. By noon the temperature has risen to 45ºC. What is the new volume of the balloon?
38.0 L
How many grams of lead (IV) nitrate were dissolved to make a 0.0465 M of a 465 mL solution?
9.82 grams
Calculate for moles using M = mol/L
0.0216 mol, multiply by 455.2
What chemical species (with relative amounts) will be produced when K2SO4 dissolves in water?
2 moles of K+ ions
1 mole of SO42- ions
Given the following chemical reaction, H2 (g) + I2 (g) <-> 2 HI (g)
The numerical value of Kc at 433ºC is 0.085. What is the equilibrium concentration of HI in molarity, if the equilibrium concentrations of [H2] is 1.2 M, and [I2] is 1.2 M
0.349 M
According to Le Chat.'s principle, what will happen to the equilibrium when I add a catalyst?
Nothing
A 35 L tank of oxygen is at 315 K with an internal pressure of 190 atmospheres. How many moles of gas does the tank contain?
260 moles of gas
You need to make 10.0 L of 1.2 M KNO3. What molarity would the potassium nitrate solution need to be if you were to use only 2.5 L of it?
4.8 M
Write the net ionic equation for the following reaction:
Pb(NO3)2 + 2KCl = PbCl2 + 2 KNO3
Pb2+ + 2Cl- = PbCl2 (s)
According to Le Chat.'s principle, what will happen to the equilibrium when I add a reactant? Or when I remove a product?
It will shift towards the product
What is the spectator cation for the following reaction?
CdSO4 (aq) + K2S (aq) -> CdS (?) + K2SO4 (?)
CaCO3 decomposes at 1200ºC to form CO2 gas and CaO. If 25 L of CO2 are collected at 1200ºC, what will be the volume of this gas after it cools to 25ºC?
5.1 L
What volume of 0.415 M AgNO3 will be required to react with 35.0 mL of 0.128 CaBr2?
0.0216 L
Set up equation and balance first!
Aqueous solutions of aluminum chloride and sodium hydroxide are mixed. Write the complete ionic equation for the reaction.
AlCl3 + NaOH -> Al(OH)3 + NaCl
Al3+ + 3Cl- + 3Na+ + 3OH- -> Al(OH)3 + 3Na+ + 3Cl-
must include the coefficients for each ion based on the balanced equation:
AlCl3 + 3NaOH -> Al(OH)3 + 3 NaCl
Indicate whether the following equilibrium mixtures contain mostly reactants or products:
A) Kc = 1.1 * 1095
B) Kc = 1.8 * 10-7
C) Kc = 4.9 * 104
A) products
B) rxt
C) products
What volume would 0.735 moles of O2 gas occupy at 1 atm of pressure and 0ºC?
16.5 L
An airtight container with a volume of 4.25 x 104 L, an internal pressure of 1.00 atm, and an internal temperature of 15.0º C is washed off the deck of a ship and sinks to a depth where the pressure is 175 atm and the temperature is 3.00º C. What will the volume of the gas inside be when the container breaks under the pressure at this depth?
Combined gas law
233 L
How many liters of .235 M magnesium nitrate are combined with 30.0 mL of 0.260 M potassium hydroxide?
Mg(NO3)2 + 2 KOH -> 2 KNO3 + Mg(OH)2
0.0166 L
What molecule is going to be the most soluble in water?
A) CH3CH2CH2OH
B) Hexane
C) CH3CH2OCH3
D) NaCl
NaCl
strongest IMF
In an exothermic reaction, what effect will removing heat have on the reaction's equilibrium?
Shift towards the product
A 5 L container is filled with 100 g of an unknown substance at 4 atm at 0ºC. What is the molar mass/identity of this substance?
Cadmium