1. Phosphorus pentachloride gas decomposes to produce phosphorus trichloride gas

Question

1. Phosphorus pentachloride gas decomposes to produce phosphorus trichloride gas and chlorine. 2. Lithium reacts with oxygen gas to produce solid lithium oxide. 3, Aqueous potassium chlorate reacts with hydrobromic acid to produce potassium chloride, water and bromine. 4. Solid zinc reacts with solid nickel (II) oxide and water to produce solid zinc hydroxide and solid nickel. 5. Solid magnesium reacts with aqueous gold (III) nitrate to produce solid gold and aqueous magnesium nitrate. 6. Aqueous ammonium carbonate reacts with aqueous calcium chloride to produce solid calcium carbonate and aqueous ammonium chloride.

Explanation / Answer

1) PCl5 (s) --> PCl3 (g) + Cl2 (g) ; 2) 4Li(s) + O2(g) ? 2Li2O(s) ; 3) KClO3 + 6Hbr -> KCl + 3H2O + 6Br ; 4) Zn + NiO + H2O -> Zn(OH)2 + Ni ; 5) 3 Mg + Au2(NO3)3 -> 2 Au + 3 MgNO3 ; 6) (NH4)2CO3 + CaCl2 -> CaCO3 + 2NH4Cl ;

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