a) When the reaction takes place a yellow precipitate will be formed.
b) The law of conservation of mass is true.
Explanation:
a) When a lead nitrate solution is mixed with a potassium chromate solution, a yellow precipitate containing lead forms according to the equation:
[tex]Pb(NO_3)_2 (aq) + K_2CrO_4 (aq)[/tex] → [tex]2 KNO_3 (aq) + PbCrO_4(s).[/tex]
b) Law of conservation of mass for the given reaction is true.
From the given table we know the mass of reactants and its products.
Law of conservation of mass is a principle when a reaction takes place in a closed system, the mass of the products and reactants in the system doesn't change.
⇒The sum of the mass of the reactants = The sum of the mass of the products.
The sum of the reactants = 128.71+128.97.
= 257.68 g.
The sum of the products = 154.10+103.58.
= 257.68 g.
Thus law of conservation of mass is true for the above reaction.
