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Rates
Acids/Bases
Le Chatlier's Principle
Equilibrium
100
What is the rate of the rxn:

k=[A]

if A is doubled?


The rate is doubled

100

What is the Ka for HCl + H2O --> H3O + Cl-   (with an equilibrium arrow)

Ka= ([H3O][Cl-]) / ([HCl][H2O])

100

True/False:

Increasing the pressure by reducing the volume of the rxn container will increase the equilibrium concentration of O3 in the following exothermic rxn:

2O3 (g) ---> 3O2 (g)

True  (will shift to the side with less moles--left)

100

Write the equilibrium expression for:

AgCl (s) ---> Ag+ (aq) + Cl- (aq)

Kc= [Ag+][Cl-]

200
What is the rate of the rxn:

k=[A]2[B]

if both A and B are doubled?


8x the rate

200

Name one of the strong acids and one of the strong bases you are required to know.

Strong acids: HNO3, HClO4, H2SO4, HCl, HBr, HI


Strong bases: any hydroxide from group 1 & any hydroxide from group 2 except for Be(OH)2 and Mg(OH)2


200
Consider the following equilibrium:

H2O2 (L) --> H2 (g) + O2 (g)

Which way will the equilibrium shift if more H2 is added?


Left

200
If the Kc is found to be very large, is the reaction reactant or product-favored?

Product favored

300

A certain drug decomposes by a 1st order rxn with k=6.0 * 10-4 s-1. A sample of this drug has an initial concentration of 3.0 mM. What will the concentration be after 10 minutes?

2.1 mM

300

What's the conjugate base of HNO3?

NO3-

300

CO (g) + NiO (s) ---> CO2 (g) + Ni (s)

For this rxn, Kc=700. If a mixture contains 0.60 M CO2 and 1*10-4 M CO, is the system at equilibrium? If not, which direction will the reaction proceed?

No; reaction will proceed left

300

For the reaction: H2 + I2 ---> 2HI, Kc= 50. A flask contains 2M HI, 0.1 M H2, and 0.1 M I2. What can be said about this reaction? (Proceeds left or right?)

Rxn proceeds left

400

Determine the rate law for the reaction: 2A + 2B --> C  (draw the table on whiteboard)

rate= (20 1/m2s) [A]2[B]

400

Which species is the conjugate base in the following reaction?:

H2PO4- + HC3- --> H2CO3 + HPO42-

HPO42-

400

Given: PCl5 (g) --> PCl3 (g) + Cl2 (g)

How will the following affect the final equilibrium concentration of PCl3?

a.) Remove PCl5

b.) decrease pressure

c.) adding a catalyst


a.) shift to the left; [PCl3] decreases

b.) shift to the right; [PCl3] increases

c.) no change

400

A rxn mixture initially contains 0.25 M [CO] and 0.400 M [O2]. At equilibrium, the concentration of CO2 is 0.15 M. Calculate Kc

6.92