Equilibrium 101- Molarity, Keq

Which of the following statements is false about a system in equilibrium?

• The concentration of reactants and products may differ

• The rates of the forward and reverse reactions may differ

• The rates of the forward and reverse reactions must be equivalent

What term belongs in the box with the question marks?

• equine value

• critical point

• equilibrium

• dynamic elevation

What is the molarity of a 0.101 L solution containing 40.0 grams of NaCl? (molar mass of NaCl is 58.44)

• 0.00678 M

• 400 M

• 6.78M

• 0.396 M

This is the equilibrium expression for which of the following reactions?

• 2 N + 2 H3 <----> 3 NH2

• 2 NH3 <----> N2 + 3 H2

• N2 + 3 H2 <----> 2 NH3

• N2 + H3 <----> NH2

What is the value of the Keq/Kc of the reaction "CO(g)+2H2(g)<---> CH3OH(g)" if the equilibrium concentrations of the reactants and product are: CO=0.17M, H2=0.34M, and CH3OH= 0.17M?

• 0.085

• 8.7

• 0.12

• 2.9

If K of a reaction is larger than one, the ________________ reaction was favored, if K is smaller than one, the ______________ reaction was favored.

• forward, reverse

• reverse, forward

• neither reaction was favored in either reaction at equilibrium

If K of a reaction is 5.5 at a given temperature, but in this very moment K is only 4, in which direction much the reaction shift in order to reach the correct K?

• forward/to the right, in favor of making more product

• in reverse/to the left, in favor of making more reactant