JeopardySolutions Kinetics Equilibri

umSolubility and Qual

Pot Pourri

100 100 100 100 100

200 200 200 200 200

300 300 300 300 300

400 400 400 400 400

500 500 500 500 500

100 Solutions

What information do you need to determine the molality of a 5.0 M solution of sucrose?

200 Solutions

A student wishes to prepare 0.50 liters of 0.8300 molar KIO3 (molecular weight 214). The proper procedure is to weigh out:_______________

300 SolutionsWhat is the final concentration of barium

ions, [Ba2+], in solution when 100. mL of 0.30 M BaCl2(aq) is mixed with 100. mL of 0.100 M H2SO4(aq)?

.1M

400 SolutionsHow many milliliters of 15.8-molar NaOH

must be diluted to obtain 2.5 liter of 4.0-molar NaOH?

500 SolutionsWhat is the minimal information needed to determine the molar mass of a solute by freezing point depression?

100 KineticsWhat does a catalyst do to the rate

of a reaction? Why? (Draw a graph showing this)

Speeds it up, by lowering the activation energy

200 KineticsThe isomerization of cyclopropane to

propylene is a first-order process with a half-life of 76 minutes at 300C. The time it takes for the partial pressure of cyclopropane to decrease from 2.0 atmosphere to 0.5 atmosphere at 300C is closest to

152 minutes

300 KineticsH3AsO4 + 3 I- + 2 H3O+ H3AsO3 + I3- +

H2OThe oxidation of iodide ions by arsenic acid in

acidic aqueous solution occurs according to the stoichiometry shown above. The experimental rate law of the reaction is:

Rate = k[H3AsO4] [I-] [H3O+]

According to the rate law for the reaction, an increase in the concentration of Iodide ion has what effect on this reaction?

400 Kinetics• 2 A(g) + B(g) 2 C(g)

• When the concentration of substance B in the reaction above is doubled, all other factors being held constant, it is found that the rate of the reaction remains unchanged. Explain this observation in terms of the reaction mechanism.

500 Kinetics (CH3)3CCl(aq) + OH- (CH3)3COH(aq) + Cl-

For the reaction represented above, the experimental rate law is given as follows.

Rate = k[(CH3)3CCl]

If some solid sodium solid hydroxide is added to a solution that is 0.010 molar in (CH3)3CCl and 0.10 molar in NaOH, What will happen to the rate and k?

100 Equilibrium

• CuO(s) + H2(g) Cu(s) + H2O(g)

• ∆H = -2.0 kilojoules

When the substances in the equation above are at equilibrium at pressure P and temperature T, how can you shift the equilibrium to favor the reactants?

200 Equilibrium

If 2.5 mol of N2O4 gas is reacted in a 7.0 L container, what is the equilibrium concentration of NO2 in the container?

K= 4.0 x 10-7

300 Equilibrium

PCl3(g) + Cl2(g) ﾛ PCl5(g) + energy Some PCl3 and Cl2 are mixed in a container

at 200 ﾛ C and the system reaches equilibrium according to the equation above. Which of the following causes an increase in the number of moles of PCl5 present at equilibrium?

I. Decreasing the volume of the container II. Raising the temperature III. Adding a mole of He gas at constant volume

400 Equilibrium SO2(g) + O2(g) 2 SO3(g)

When 0.40 mole of SO2 and 0.60 mole of O2 are placed in an evacuated 1.00 liter flask, the reaction represented above occurs. After the reactants and the product reach equilibrium and the initial temperature is restored, the flask is found to contain 0.30 mole of SO3. Based on these results, the equilibrium constant, Kc, for the reaction is

500 Equilibrium In which of the following systems would the

number of moles of the substances present at equilibrium NOT be shifted by a change in the volume of the system at constant temperature?

a. CO(g) + NO(g) CO2(g) + 1/2 N2(g) b. N2(g) + 3 H2(g) 2 NH3(g)

c. N2(g) + 2 O2(g) 2 NO2(g) d. N2O4(g) 2 NO2(g) e. NO(g) + O3(g) NO2(g) + O2(g)

100 Solubility & QualHow many moles of NaF must be dissolved in

1.00 liter of a saturated solution of PbF2 at 25ºC to reduce the [Pb2+] to 1x10-6 molar? (Ksp PbF2 at 25 ºC = 4.0x10-8)

200 Solubility & QualBarium sulfate is LEAST soluble in a 0.01

molar solution of which of the following?a. Al2(SO4)3 d. NH3

b. (NH4)2SO4 e. BaCl2

c. Na2SO4

300 Solubility & Qual When dilute nitric acid was added to a solution of

one of the following chemicals, a gas was evolved. This gas turned a drop of limewater, Ca(OH)2, cloudy, due to the formation of a white precipitate. The chemical contained which of the following ions? (Sodium, bicarbonate, Magnesium, Ammonium, Sulfate)

400 Solubility & Qual

A 20.0 milliliter sample of 0.200 molar K2CO3 solution is added to 30.0 milliliters of 0.400 molar Ba(NO3)2 solution. Barium carbonate precipitates. The concentration of barium ion, Ba2+, in solution after reaction is:

500 Solubility & QualWhat is the equilibrium concentration of

chloride ions when 100 mL of .4 M AgNO3 is mixed with 200 mL of .4M NaCl?

100 Pot Pourri What is an electrolyte?

200 Pot PourriA solution of 1.0 M NaCl is diluted. What

happens to volume, moles, and molarity of NaCl?

300 Pot PourriRank the following three substances from

weakest to strongest electrolyte.

HNO3

C12H22O11

HC2H3O2

400 Pot PourriConsider the reaction: K=4.85200. g of NH4NO3(s) are placed in a reaction

vessel containing H2O(g) at a concentration of 2.0 M and N2O(g) at a concentration of 2.0 M. After equilibrium is reached, will the mass of NH4NO3(s) increase, decrease or remain unchanged?

500 Pot PourriWhat is the mole fraction of ethanol,

C2H5OH, in an aqueous solution in which the ethanol concentration is 4.6 molal?