Translate the following statements into chemical equations and then balance them.
(a) Hydrogen gas combines with nitrogen to form ammonia.
(b) Hydrogen sulphide gas burns in air to give water and sulpur dioxide.
(c) Barium chloride reacts with aluminium sulphate to give aluminium chloride
and a precipitate of barium sulphate.
(d) Potassium metal reacts with water to give potassium hydroxide and hydrogen
gas.
Answers
Answer:
(a) 3H2 (g) + N2 (g) ----- 2NH3 (g)
(b) 2H2S (g) + 3O2(g) ------ 2H2O(l) + 2SO2 (g)
(c) 3BaCl2 (aq) + Al2(So4)3 (aq) ----- 2AlCl3 (aq) + 3BaSo4 (s).
(d) 2K (s) + 2H2O(l) ------ 2KOH(aq) + H2(g).
Required solution :-
a. Unbalanced: H₂ + N₂ → NH₃
Balanced: 3H₂ + N₂ → 2NH₃
b. Unbalanced: H₂S + O₂ → H₂O + SO₂
Balanced: 2H₂S + 3O₂ → 2H₂O + 2SO₂
c. Unbalanced: BaCl₂ + Al₂(SO₄)₃ → AlCl₃ + BaSO₄
Balanced: 3BaCl₂ + Al₂(SO₄)₃ → 2AlCl₃ + 3BaSO₄
d. Unbalanced: K + H₂O → KOH + H₂
Balanced: 2K + 2H₂O → 2KOH + H₂
More information :-
A balanced chemical equations have the same number and type of each atom on both left and right sides of the equation. Eg. S₈ + F₂ ---> SF₆
To balance an equation, multiply the iron on the LHS by 3. Then the number of atoms of each element becomes equal on the left and the right side as well. Thus, this equation becomes a balanced equation.
When the numbers of atom are not same in the both side of the reaction is called as a unbalanced equation. Eg. Mg + O₂ → MgO