Unit 5 (stoichiometry and reactions)
The number of grams are in 3.5 moles of K
What is 136.85 g?
The one stress that changes the numeric value for K
Temperature
The pH of a solution of 0.05 M HCl
The partial pressure of oxygen gas if the total pressure of a mixture of oxygen and nitrogen is 14.7 atm and the partial pressure of nitrogen gas is 2.3 atm
What is 12.4 atm
Given the reaction:
2A → 3B + C ΔH = -112 kJ
What is the enthalpy of the reaction:
6B + 2C → 4A
+ 224 kJ
The type of reaction represented below:
CuCl2 + F2 = CuF2 + Cl2
What is single replacement?
The equilibrium constant expression (Kc) for the reaction:
2A(s) + B(g) = 3C(g)
Kc = [C]3/[B]
The conjugate acid of H2PO4-
What is H3PO4
The volume of 3.6 moles of gas at STP
What is 80.6 L
Given the reaction:
4A + 2B = C + D H = 216 kJ/mol
If the reaction had 50% efficiency, how much energy would be produced by combusting 16 moles of A
432 kJ
Given the balanced chemical reaction below:
3CuCl2 + 4Cr = 2Cr2Cl3 + 3Cu
If 6 moles of CuCl2 reacted with 10 moles of Cr, the number of moles of Cr2Cl3that would be formed
What is 4 mol?
Given the reaction: A(g) + 3B(g) = 2C(g)
If the rate of formation of chemical C is 3.8 atm/min, calculate the rate of chemical B being consumed
What is 5.7 atm/min
The amount of 0.5 M HCl required to neutralize 30 mL of 0.75 M NaOH
What is 45 mL
The pressure of 1.7 moles of a gas given the temperature is 280 K and the volume is 1.6 L
What is 24.4 atm
Classify each of the following as endo or exothermic:
Bond forming
A process that requires the input of heat
A reaction that results in a temperature increase in the surrounding water
Bond forming EXO
A process that requires the input of heat ENDO
A reaction that results in a temperature increase in the surrounding water EXO
The sum of the coefficients in the balanced chemical reaction:
____ AlCl3 + ______O2 = ______Al2O3 + _______Cl2
What is 15
The two impacts of increasing temperature on the rate of a reaction according to collision theory
Increases frequency of collisions
Increases proportions of collisions with sufficient activation energy (more important impact)
the pH of a solution of 0.0007 M Ca(OH)2
What is 11.1
Given a mixture of gasses A, B, and C. If additional gas A is added, list the impact of each of the following:
The partial pressure of gas A
The partial pressure of gas B
The total pressure
The mole fraction of gas A
The mole fraction of gas B
The partial pressure of gas A = increases
The partial pressure of gas B = no impact
The total pressure = increases
The mole fraction of gas A = increases
The mole fraction of gas B = decreases
What happens on the molecular level as heat is added to each portion of the phase diagram:
Solid only:
Solid + Liquid:
Liquid only:
Liquid + Gas:
Gas Only:
Solid only: T increases, particles move faster
Solid + Liquid: IMF weakened
Liquid only: T increases, particles move faster
Liquid + Gas: IMF broken
Gas Only: T increases, particles move faster
Given the unbalanced reaction below:
CuCl2 + Na2O = NaCl + CuO
If 38.70 grams of Na2O reacts with excess CuCl2, the mass of NaCl that are formed
What is 72.98 g?
Given a reaction: A(g) + 2B(g) = C(g)
If the reaction starts at equilibrium, but then has some of gas B removed, the impact on each of the following:
Rate of forward reaction =
Rate of reverse reaction =
Position at equilibrium =
Numeric value of K =
Rate of forward reaction = decreases
Rate of reverse reaction = decreases
Position at equilibrium = shifts left
Numeric value of K = unchanged
The balanced chemical reaction between H2S and NaHCO3
What is:
H2S + 2NaHCO3 = Na2S + 2H2O + 2CO2(g)
The increase in temperature when 3.5L of gas at 30C and 1.5 atm is compressed to a new volume of 1.0L at a pressure of 6.1 atm.
What is 49 degrees (celcius or kelvin)
Calculate the total heat used by heating 36 grams (2 moles) of water from ice at -20C to gas at +130C
What is 112 kJ