10.1

Question 1

what is a reversible reaction ?

Answer 1

where reactions can go forward and backward

Question 2

what is a forward reaction ?

Answer 2

initially reactants are used up quickly but then slow as their conc drops

Question 3

what is backward reaction ?

Answer 3

initially reactants are reformed slowly but then speed up as the conc of products increases

Question 4

what is an irreversible change ?

Answer 4

can only occur in one direction

Question 5

give some examples of irreversible changes

Answer 5

making bread and combustion

Question 6

what conditions could be altered for a reversible change ?

Answer 6

concentration of a reactant or product
temperature
pressure

Question 7

what are the three important features of a system that has reached equilibrium ?

Answer 7

1. forward and reverse reactions occur at exactly same rate
2. the conc of reactants and products are constant
3. equilibrium state can be reached from either the reactant side or the product side of the equation

Question 8

dynamic - define equilibrium

Answer 8

the forward and backward reactions occur at equal rates so that the overall effect is no change

Question 9

the rate at which A + B convert to C + D can be :
slower
the same
faster

Answer 9

slower - shifts to the left
the same 0 dynamic equilibrium
faster - shift to the right