Question

Will give medals... Which of the following chemical equations violates the law of conservation of mass?

a. Ti + 2Cl2 yields TiCl4
b. 2C2H2 + 5O2 yields 4CO2 + 2H2O
c. Li2SO4 + 2Ca(NO3)2 yields 2LiNO3 + 2CaSO4
d. MgSO4 + 2NaOH yields Mg(OH)2 + Na2SO4

Answer 1

According to stoichiometery,, compounds react in whole no ratios, ie, the ratio of the balanced eqns coefficient ratios. In 3rd eqn there is one sulphate in reactants side and 2 in products. Thus the law is violated. Also there are 4 NO3 in reactants and 2 in products.

Answer 2

Ok makes sense to me, and thank u for explaining ^_^

Answer 3

My pleasure.