SI SDSU Chem 114 SI exam two review

True or false: Once a system is in equalribum chemical reactions stop.

• True

• False

What is the q value if a exothermic system has a product concentration of [.443] and reactant concentration is [.332]. Assume no exponets or coeffcients are present.

• 1.33

• 0.75

• 1.62

• 0.62

If the k value of the system is 1.02x10^-8 at our current q value of 1.33 what can be expected.

• Nothing

• Q Not enough information to determine

• More recatant is produced

• More product is produced

If an reaction is exothermic and heat is added to the system what reaction shift will occur

• no shift

• more products will be produced

• more reactants will be produced

• not enough information

if an reaction is endothermic and heat is taken away from the system what will occur

• No shift

• more products will be produced

• more reactants will be produced

• need more information

If Q>K then....

answer choices

• More products will be produced

• More reactants will be produced

Which would be an example of a Bronsted-lowery acid

answer choices

• H acceptor

• H donor

• H producer

• OH donor

If at equilibrium [N2 ] = 0.600 M and [NH3 ] = 0.300 M, what

is the concentration of hydrogen gas in the mixture for the

reaction below?

N2 (g) + 3 H2 (g) ↔ 2 NH3 (g) K = 5.8 x 10-2 @ 25o C

answer choices

• 1.37 M

• 2.58 M

• .300 M

• .480 M

If at equilibrium [S2 ] = 0.450 M and [SH2 ] = 0.220 M, what

is the concentration of hydrogen gas in the mixture for the

reaction below?

S2 (g) + 2 H2 (g) ↔ 2 SH2 (g) K = 6.2 x 10 +2 @ 25o C

• 
  1.7 x 10 -4 M

• 2.6 x 10 -3 M

• .013

• .220

Calculate the value of the standard free energy change,

ΔGo , in kJ/mol for the reaction below.

Li2 CO 3 (s) ↔ 2 Li+ (aq) + CO 3-2 (aq) Ksp = 3.7x10-3 at 25o C

• 13.92 spontanous reaction

• 13.92 nonspontanous reaction

• 19.76 spontanous reaction

• 19.76 nonspontanous reaction