Examine the equation below, then determine which of the following steps the students could have taken to prove that mass was conserved during the reaction.
Mg(s) + HCl(aq) ⇒ H2(g) + MgCl2(aq)
A
The students could recalibrate the triple-beam balance before finding the mass of the solution again.
B
The students could hold a glowing splint over the top of the test tube to check for the presence of hydrogen gas.
C
The students could have collected the hydrogen gas formed during the reaction, found its mass, and added that amount to the mass of the solution.
D
The students could boil the solution that formed to remove excess water, weigh the solid magnesium chloride, then compare that mass to the mass of the reactants.
D
The students could boil the solution that formed to remove excess water, weigh the solid magnesium chloride, then compare that mass to the mass of the reactants.