Terminology
The speed at which a reaction moves is also known as the ___.
Rate (of reaction)
Name one of the units that time can be in.
Seconds, minutes, hours, days, etc.
What will be the shift when extra NH3 is added to the following system at equilibrium?
3 H2(g) + N2(g) ⇌ 2 NH3(g)
Left
When writing an equilibrium equation the ____ becomes the exponent.
Coefficient
Given the reaction:P4(s) + 5 O2(g) → 2 P2O5(s)
If the initial rate of the reaction consumes 1 mole of phosphorus per second, what is the rate at which diphosphorus pentoxide is formed initially?
2 moles per second
What is the term for when the forward and reverse reactions are happening at the same rate?
Chemical Equilibrium
When asked for concentration of a substance, your unit should be...
M (Molarity)
What will be the shift when H2 is added to the following system at equilibrium?
3 H2(g) + N2(g) ⇌ 2 NH3(g)
Right
The difference between Kc and Kp is that in a Kc equation you are plugging in the ___ of the compounds, while in Kp you are plugging in the ____ of the compounds.
concentrations, partial pressures
Given the reaction: C3H8(g) + 5 O2(g) → 3 CO2 + 4 H2O(g)
If the initial rate of the reaction produces 2 moles of water vapor per second, what is the rate at which oxygen is consumed initially?
2.5 moles per second
How do you calculate for the unit M (Molarity)?
Molarity = moles/liter
If your answer is in M/s what have you calculated for?
Rate of Reaction
When the temperature is decreased on the following system at equilibrium, you will shift...
2 HCl(aq) + Mg(s) ⇌ MgCl2(aq) + H2(g) + heat
Right
2NO2 → N2O4
What is the Kc value for the reaction at equilibrium if the concentrations are [N2O4] = 1.5 M and [NO2] = 2.0 M?
0.375
In the reaction 2NO(g) → N2(g) + O2(g), the concentration of NO goes from 10 M to 4 M in 30 seconds. What is the rate of change for NO?
Include units!
-0.2 M/s
The relationship between the concentrations of species and the rate of a reaction is known as ___.
Reaction order
What is the letter used to show the rate constant in a rate law equation?
k (lowercase)
What way will the reaction shift if I increase the pressure?
2 HCl(aq) + Mg(s) ⇌ MgCl2(aq) + H2(g) + heat
Right - Towards the side with fewer molecules
Calculate Kp for the following reaction if the pressure of dinitrogen pentoxide is 4atm, oxygen gas is 2 atm, and nitrogen dioxide is 3 atm.
2N2O5(g) → O2(g) + 4NO2(g)
10.125
If I double the concentration of a reactant and the rate of the reaction is raised to the second power, what type of reaction is it?
Second Order Reaction
A ____ increases the rate of a reaction by lowering the activation energy.
Catalyst
When calculating Kp - the value of R should match which variable's unit?
Pressure (if pressure is in atm then use the R for atm)
This is the aqueous iron(III) thiocyanate equilibrium.
Fe3+(yellow) + SCN-(colorless) ⇌ [FeSCN]2+(dark red)
What color will the solution be if aqueous iron(III) chloride is added to the solution at equilibrium?
Dark Red
A 5 liter flask at equilibrium is found to contain 12.5 moles of N2O4 and 10.0 moles of NO2. Calculate Kc.
N2O4(g) → 2NO2(g)
1.6
In the reaction H2O2(aq) → H2O(l) + ½ O2(g), the initial concentration of H2O2 is 0.90 M, and the initial rate of reaction is -4.375×10–3 M/s. What will be [H2O2] at t = 80 s? Include units!
0.55 M