In the reaction 2NaCl + 2H2O ? 2NaOH + Cl2 + H2, the reactants should:

1.) weigh more than the products because the 1.)reaction isn't perfect
2.) weigh less than the products because mass is lost
3.) weigh the same as the products
4.) weigh more because Cl2and H2are gases

Question

In the reaction 2NaCl + 2H2O ? 2NaOH + Cl2 + H2, the reactants should:

1.) weigh more than the products because the 1.)reaction isn't perfect
2.) weigh less than the products because mass is lost
3.) weigh the same as the products
4.) weigh more because Cl2and H2are gases

anonymous · Answer

3. Because of the Law of conservation of mass (the mass change is negligible and is ignored in case of ordinary chemical reactions)