Magical A student investigated the law of conservation of mass.
The law of conservation of mass states that the mass of the products is equal to the mass
of the reactants.
mical reactions
This is the method used.
1. Pour lead nitrate solution into a beaker labelled A.
2. Pour potassium chromate solution into a beaker labelled B.
3. Measure the mass of both beakers and contents.
4. Pour the solution from beaker B into beaker A.
5. Measure the mass of both beakers and contents again.
When lead nitrate solution and potassium chromate solution are mixed, a reaction takes
place.
This is the equation for the reaction:
Pb(NO3)2(aq) + KaCros(aq)
PbCrO4(s) + 2KNO3(aq)
(a)
What would the student see when the reaction takes place?