Question

Write proper chemical equations and balance the following reactions

            a)         Write a balanced chemical equation to represent the reaction of solid magnesium and gaseous oxygen to form solid magnesium oxide.

b)Write a balanced equation to represent the decomposition of solid ammonium nitrate into dinitrogen monoxide gas and liquid water.

c)Write a balanced equation to represent the reaction of the gases chlorine and ammonia (NH₃) with an aqueous solution of sodium hydroxide to form water, an aqueous solution containing sodium chloride, and hydrazine, N₂H₄.

Answer 1

a)

Magnesium   +   oxygen   ------->   magnesium oxide Mg      +       O2   --------->      MgO The oxygen atoms did not match so place a 2 in front of the MgO so that there are now two O on the right.                                                        Mg   +    O2   -------->    2 MgO Now the oxygen atoms balance but the magnesium atoms no longer match. We have placed a 2 in front of the MgO which means we have 2 Mg atoms and 2 O atoms in total. If we place a 2 in front of the Mg on the left side then we get a balanced equation. 2 Mg   +   O2   -------->    2 MgO b) Ammonium nitrate (Soild) ------> dinitrogen monoxide (gas) + Water (liquid) (NH4)(NO3) --------> N2O + H2O Balanced Equation is, NH4NO3 (Soild) --------->  N2O (Gas) + 2H2O (Liquid)

c) Chlorine(gas)+Ammonia + Sodium hydroxide ------> Hydrazine + water + sodium chloride

Cl(g) + NH3 + NaOH ------> N₂H_{4 +}   H₂O + NaCl

Balancing Equation:

2 Cl(g) + 2 NH3 + 2 NaOH --------> N₂H₄ + 2H₂O + 2NaCl