Reversible reactions and equilibria

Question 1

what happens in reversible reactions

Answer 1

the product molecules can react with each other or decompose & form the reactant molecules again

Question 2

the reaction happens in what directions

Answer 2

both

Question 3

forward reaction produces

Answer 3

products

Question 4

reverse reaction forms

Answer 4

reactants

Question 5

symbol for reversible reactions

Answer 5

⇌

Question 6

effect of heat on ammonium chloride

Answer 6

• heating it produces ammonia and hydrogen chloride gases
• as the hot gases cool down, they recombine to form the reactant (solid ammonium chloride)

Question 7

what’s the reversible reaction for ammonium chloride

Answer 7

NH4Cl (s) ⇌ NH3 (g) + HCl (g)

Question 8

is forwards reaction for ammonium chloride endo or exo thermic

Answer 8

endothermic (decomposition)

Question 9

is reverse reaction for ammonium chloride endo or exo thermic

Answer 9

exothermic (forming)

Question 10

hydrated copper sulfate is seen as

Answer 10

blue crystals

Question 11

hydrated copper sulfate can be ___ to form ___

Answer 11

heated

anhydrous copper sulfate

Question 12

forwards reaction in hydrated copper sulfate is

Answer 12

endothermic as energy is taken in to remove water (make anhydrous copper sulfate)

Question 13

anhydrous copper sulfate can be seen as

Answer 13

white powder

Question 14

the reverse reaction for anhydrous copper sulfate is

Answer 14

exothermic as water is added to form hydrated copper sulfate