Question

Chem-question

Answer 1

First three

Answer 2

Next three

Answer 3

318

Answer 4

Ill start with 321 because its easy. If you added NaCN more AgCN would precipitate. B

Answer 5

@sweetburger because it's at equilibrium already can we assume that it's saturated solution if so then adding more NaCN would precipitate in my opinion

Answer 6

Agreed

Answer 7

yes it's B

Answer 8

For 320 [.2]^2/([.1][.2])= 2=Keq

Answer 9

So 320 is B. I think.

Answer 10

319. we have

\[N _{2} + O _{2} --> 2NO \]

Answer 11

319.

A. equilibrium constant is temperatuer dependent so if we changed the temperature we should also change the equilibrium concentrations because we would have a new Keq value.
C adding more NO will shift to the reactants if it's already at equilibrium
D N2 we don't know if we added or removed it but that would cause a shift.

B. is the answer because if we have the same number of moles on either side of the equation increasing the pressure does not cause any change in the equlibrium concentrations. remember increase in pressure favors the side with fewer number of moles , while decreasing pressure it's the opposite.

Answer 12

Completely agreed.

Answer 13

318. Adding a Catalyst would lower the activation energy of the reaction which in turn would increase the rate of the forward reaction, but would also increase the rate of the reverse reaction as the activation energy of the reverse reaction is also lowered showed in this diagram below.