Kamla prepared aqueous solutions of barium chloride and sodium sulphate. She weighed them separately and then mixed them in a beaker. A white precipitate was immediately formed. She filtered the precipitate, dried it and then weighed it. After reading this narration, answer the following questions:
(a) Will the weight of the precipitate be the same as that of the reactants before mixing? *
Your answer
(b) If not, what she should have done? *
Your answer
(c) Which law of chemical combination does this support? *
Your answer
(d) What is the value based information associated with it?
Answers
Answer:
a) No, it will not be the same.
b) She should have weighed the total contents of the beaker after the reaction and not the precipitate alone.
C) It supports the law of conservation of mass.
d) Whenever the law of conservation of mass is to be verified in the laboratory, total mass of the reactants and also of products should be taken into account. Moreover, none of the species be allowed to leave the container.
A) No, it will not be the same.
B)She should have weighed the total contents of the beaker after the reaction and not the precipitate alone.
C)It supports the law of conservation of mass.
D)Whenever the law of conservation of mass is to be verified in the laboratory, total mass of the reactants and also of products should be taken into account. Moreover, none of the species be allowed to leave the container.
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