4. Mention the physical states of the reactants and products of the following chemical reactions
and balance the equatins. (AS1
)
(a) C6
H12O6 ––––> C2
H5
OH + CO2
(b) NH3
+ Cl
2 ––––> N2
+ NH4
Cl
(c) Na + H2
O ––––> NaOH + H2
II. Application of Concepts
1. Balance the following chemical equation equation after writing the symbolic representation. (AS1
)
(a) Calcium hydroxide (s) + Nitric acid (aq) ––––> Water (l) + Calcium Nitrate (aq)
(b) Magnesium (s) + lodine (s) ––––> Magnesium lodide (s)
2. Write the following chemical reactions including the physical states of the substances and
balance chemical equations. (AS1
)
(a) Sodium Hydroxide reacts with Hydrochloric acid to form Sodium Chloride and Water.
(b) Barium Chloride reacts with liquid Sodium Sulphate to leave Barium Sulphate as a
precipitate and also form liquid Sodium Chloride.
3. Potassium nitrate and Sodium Nitrate reacts separately with copper sulphate solution. Write
balanced chemical equations for the above reactions. (AS1
)
III. Higher Order Thinking Questions
1. 2 moles of Zinc reacts with a cupric choloride solution containing 6.023x1022
formula units of CuCl2
Calculate the moles of copper obtained (AS1
)
Zn(s) + CuC12(aq)
––––> ZnC12(aq)
+ Cu(s)
2. 1 mole of propane (C3
H8
) on combustion at STP gives ‘A’ kilo joules of heat energy.
Caliculate the heat libarated when 2.4 ltrs of propane on combustion at STP. (AS1
)
3. Caliculate the mass and volume of oxygen required at STP to convert 2.4 kg of