types of inorganic reaction

Question 1

thermal decomposition - define

Answer 1

a compound decomposes on heating

Question 2

equation for the thermal decomposition of copper carbonate

Answer 2

CuCO3(s) -> CuO(s) + Co2(g)

Question 3

how would you check that the gas produced is carbon dioxide ?

Answer 3

with limewater, if CO2 is present it would turn cloudy

Question 4

balanced equation for the thermal decomposition of hydrated copper sulphate, CuSO4.5H2O

Answer 4

CuSO4.5H2O -> CuSO4 + 5H2O

Question 5

when acids dissolve in water what do they produce ?

Answer 5

aqueous hydrogen ions

Question 6

spectator ions - define

Answer 6

ions present in a solution but do not take part in a solution’s chemical reaction

Question 7

acid react with the more reactive metals to form hydrogen gas plus what

Answer 7

salt

Question 8

write out the ions to show the ions of this equation
Mg(s) + 2HCI(aq) -> MgCI2(aq) + H2(g)

Answer 8

Mg(s) + 2H(aq) + 2CI-(aq) -> Mg2+ (aq) + 2CI-(aq) + H2(g)

Question 9

write the ionic equation for the reaction

Mg(s) + 2H(aq) + 2CI-(aq) -> Mg2+ (aq) + 2CI-(aq) + H2(g)

Answer 9

Mg(s) + 2H(aq) -> Mg2+(aq) + H2(g)

Question 10

all alkalis dissolve in water to produce what ?

Answer 10

hydroxide ions, OH-(aq)

Question 11

during a neuralisation reaction, an acid reacts with what to form a salt ?

Answer 11

metal oxide or hydroxide

Question 12

balanced equation for the reaction between hydrochloric acid and sodium hydroxide

Answer 12

HCI + NaOH -> NaCI + H2O

Question 13

balanced equation for the reaction between hydrochloric acid and calcium carbonate

Answer 13

CaCO3 + HCI -> CaCI + CO2 + H2O

Question 14

ionic precipitation reaction - define

Answer 14

reaction which produces a solid precipitate on mixing two solutions containing ions

Question 15

soluble in water - compounds

Answer 15

• all common sodium, potassium and ammonium compounds
• all nitrates
• most chlorides
• most sulphates
• sodium carbonate, potassium carbonate, ammonium carbonate
• sodium hydroxide, potassium hydroxide, ammonium hydroxide

Question 16

insoluble in water - compounds

Answer 16

• silver chloride, lead chloride
• lead sulphate, barium sulphate, calcium sulphate
• most carbonates
• most hydroxides