Question

In the procedure shown below, a calcium chloride solution is mixed with a sodium sulfate solution to create the products shown. Which of the following conclusions is supported by the information in the diagram?

Answer 1

The diagram has been attached below.

After looking at both of the diagrams, it can be inferred that the mass of the reactants and products remain constant throughout the experiment. This abides by the law of conservation of mass., i.e. -

For any system shut down to any transfer of matter and energy, the mass of the system must remain the same throughout, since the system's mass cannot alter, and the quantity can neither be increased nor decreased.

Answer 2

Please refer to the attachment for the diagram :

Based on diagram we can write the following balanced equation :

CaCl2 + Na2SO4----> CaSO4 + 2 NaCl

Conculsion :

We observe that total mass of reactants before reaction = Total mass of Products after the reaction

Hence the above double decomposition reaction obey Law of Conservation of mass which states that

"Mass is neither created nor destroyed in a chemical reaction "