Write the balanced equation for the following chemical reactions. 1) Hydrogen + Chlorine → Hydrogen chloride 2) Barium chloride + Aluminium sulphate → Barium sulphate +Aluminium chloride 3) Sodium + Water → Sodium hydroxide + Hydrogen 4) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water 5). Zinc + Silver nitrate → Zinc nitrate + Silver 6) Aluminium + Copper chloride → Aluminium chloride + Copper 7) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride 8) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) +Barium bromide(s) 9) Zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g) 10) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) +Hydrogen(g)
Answers
1) H2+ 2Cl------> 2HCl
2) 3BaCl2+ Al2(SO4)3-------> 3BaSO4+ 2AlCl3
3) 2Na+ 2H2O-----> 2NaOH+ H2
4) Ca(OH)2+ CO2------> CaCO3+ H2O
5) Zn+ 2AgNO3-----> Zn(NO3)2+ 2Ag
6) 2Al+ 3CuCl2-----> 2AlCl3+ 3Cu
7) BaCl2+ K2SO4------> BaSO4 + KCl
8) 2KBr+ BaI2--------> 2KI+ BaBr2
9) ZnCO3-----> ZnO+ CO2
10) Mg+ 2HCl-----> MgCl2+ H2
(a) H2 (g) + Cl2 (g) → 2HCl (g)
(b) 3BaCl2 (s) + Al2(SO4)3 (s) → 3BaSO4(s) + 2AlCl3 (s)
(c) 2Na(s) + 2H2O (l) → 2NaOH (aq) + H2 (g)
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water Ca(OH)2 + CO2 → CaCO3 + H2O
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water Ca(OH)2 + CO2 → CaCO3 + H2O(e) Zinc + Silver nitrate → Zinc nitrate + Silver
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water Ca(OH)2 + CO2 → CaCO3 + H2O(e) Zinc + Silver nitrate → Zinc nitrate + Silver Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water Ca(OH)2 + CO2 → CaCO3 + H2O(e) Zinc + Silver nitrate → Zinc nitrate + Silver Zn + 2AgNO3 → Zn(NO3)2 + 2Ag(f) Aluminium + Copper chloride → Aluminium chloride + Copper
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water Ca(OH)2 + CO2 → CaCO3 + H2O(e) Zinc + Silver nitrate → Zinc nitrate + Silver Zn + 2AgNO3 → Zn(NO3)2 + 2Ag(f) Aluminium + Copper chloride → Aluminium chloride + Copper 2Al + 3CuCl2 → 2AlCl3 + 3Cu
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water Ca(OH)2 + CO2 → CaCO3 + H2O(e) Zinc + Silver nitrate → Zinc nitrate + Silver Zn + 2AgNO3 → Zn(NO3)2 + 2Ag(f) Aluminium + Copper chloride → Aluminium chloride + Copper 2Al + 3CuCl2 → 2AlCl3 + 3Cu(g) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride
(d) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water Ca(OH)2 + CO2 → CaCO3 + H2O(e) Zinc + Silver nitrate → Zinc nitrate + Silver Zn + 2AgNO3 → Zn(NO3)2 + 2Ag(f) Aluminium + Copper chloride → Aluminium chloride + Copper 2Al + 3CuCl2 → 2AlCl3 + 3Cu(g) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride BaCl2 + K2SO4 → BaSO4 + 2KCl
(h) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)
) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)2KBr(aq) + BaI2(aq) → 2KI(aq) + BaBr2(s)
BaBr2(s)
BaBr2(s) In this reaction, both the reactants exchanges ions to for two new products, hence, it is a double displacement reaction
BaBr2(s) In this reaction, both the reactants exchanges ions to for two new products, hence, it is a double displacement reaction(i) zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)
) zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)ZnCO3(s) → ZnO(s) + CO2(g)
CO2(g)In this reaction, a single substance yields two different product. hence, it is a decomposition reaction
CO2(g)In this reaction, a single substance yields two different product. hence, it is a decomposition reaction(j) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)
) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)H2(g) + Cl2(g) → 2HCl(g)
2HCl(g)
2HCl(g) In this reaction, two different reactants react with each other to form a single product. Hence, it is called a combination reaction
2HCl(g) In this reaction, two different reactants react with each other to form a single product. Hence, it is called a combination reaction(k) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)
) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
In this reaction, more reactive Mg is replacing less reactive H. Hence, it is displacement reaction