Question

1. when sodium metal reacts with iron (ii) chloride, iron metal and sodium chloride are formed.
2. ammonia gas (nh₃) reacts with oxygen gas in the presence of a platinum catalyst and yields nitrogen monoxide gas and water vapor.

translate the following reactions into ordinary language.

1. al₂(so₄)₃(aq) + 3 ca(oh)₂(aq) → 2 al(oh)₃(s) + 3 caso₄(s)
2. ca(oh)₂(aq) + co₂(g) → caco₃(↓) + h₂o(l)
3. mgco₃(s) + 2hcl(aq) → mgcl₂(aq) + h₂o(l) + co₂(↑)
4. caco₃(s) →δ cao(s) + co₂(↑)

Explanation:

For each reaction equation, identify the reactants (left - hand side) and products (right - hand side), and then describe the reaction in words based on the chemical formulas and their states.

• For \(Al_2(SO_4)_3(aq)+3Ca(OH)_2(aq)\to2Al(OH)_3(s)+3CaSO_4(s)\):
• Reactants: Aqueous aluminium sulfate (\(Al_2(SO_4)_3\)) and aqueous calcium hydroxide (\(Ca(OH)_2\)).
• Products: Solid aluminium hydroxide (\(Al(OH)_3\)) and solid calcium sulfate (\(CaSO_4\)).
• For \(Ca(OH)_2(aq)+CO_2(g)\to CaCO_3(\downarrow)+H_2O(l)\):
• Reactants: Aqueous calcium hydroxide (\(Ca(OH)_2\)) and gaseous carbon dioxide (\(CO_2\)).
• Products: Precipitated calcium carbonate (\(CaCO_3\)) and liquid water (\(H_2O\)).
• For \(MgCO_3(s)+2HCl(aq)\to MgCl_2(aq)+H_2O(l)+CO_2(\uparrow)\):
• Reactants: Solid magnesium carbonate (\(MgCO_3\)) and aqueous hydrochloric acid (\(HCl\)).
• Products: Aqueous magnesium chloride (\(MgCl_2\)), liquid water (\(H_2O\)) and gaseous carbon dioxide (\(CO_2\)).
• For \(CaCO_3(s)\xrightarrow{\Delta}CaO(s)+CO_2(\uparrow)\):
• Reactant: Solid calcium carbonate (\(CaCO_3\)).
• Products: Solid calcium oxide (\(CaO\)) and gaseous carbon dioxide (\(CO_2\)) (with heating (\(\Delta\))).

Answer:

1. Aqueous aluminium sulfate reacts with aqueous calcium hydroxide to produce solid aluminium hydroxide and solid calcium sulfate.
2. Aqueous calcium hydroxide reacts with gaseous carbon dioxide to form precipitated calcium carbonate and liquid water.
3. Solid magnesium carbonate reacts with aqueous hydrochloric acid to yield aqueous magnesium chloride, liquid water and gaseous carbon dioxide.
4. Solid calcium carbonate (upon heating) decomposes into solid calcium oxide and gaseous carbon dioxide.