Question

5 G is a colourless crystalline solid which reacts with dilute nitric acid to give

a colourless solution, H, and a colourless, odourless gas, I, which turns
limewater milky. G has a lilac flame colour.
a State the names of G, H and I.
b Write an equation (full or ionic) for the reaction between G and dilute nitric
acid.​

Answer 1

a. G is Potassium carbonate- K₂CO₃ , H is Potassium nitrate - KNO₃ and G is carbon(IV)oxide CO₂

b. K₂CO₃(s) + 2HNO₃(l) ⇒ 2KNO₃(aq) + H₂O(l) + CO₂(g)

Step-by-step explanation:

a. Since G produces a lilac flame color, it contains potassium, K. Also, since the product of G and nitric acid produces I which turns lime water milky, I is CO. So, G is K₂CO₃ Potassium carbonate. Also, H is KNO₃ since there is an acid base reaction between potassium carbonate and nitric acid to produce a salt which is KNO₃, water, H₂O and a gas carbon(IV)oxide CO₂.

b. The full chemical equation for the reaction between G and dilute nitric acid is

K₂CO₃(s) + 2HNO₃(l) ⇒ 2KNO₃(aq) + H₂O(l) + CO₂(g)