2.2 Conservation Of Mass Worksheet PDF

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Chapter 2—Conservation of Mass Worksheet Open the Conservation of Mass Activity (Section 2.2, Figure 2.2) to complete this worksheet.

1. Measure the mass of each item by dragging it onto the balance. Empty Empty Flask with Flask with Beaker with flask beaker MnS (small) MnS (large) HCl (small)

Beaker with HCl (large)

Mass (g)

2. Why might it be important to measure the mass of the containers before carrying out the experiment?

3. Choose the small amount of MnS and the large amount of HCl. Click Start to mix them. a. After the reaction is complete, measure the mass of the flask and its contents.

b. According to your measurements from problem #1, what was the total mass of the reactants (minus the containers)?

c. What is the total mass of the products (minus the container)?

d. Compare your answers for b and c above. How would these values compare if there had been a hole in the balloon?

4. When the reaction is complete, you can click the magnifying glass to see a molecular view. How is the phase of each product depicted in its molecular view?

5. When you mix a small amount of MnS powder and a large amount of HCl solution, all of the powder goes away. a. What happened to it?

b. With any other combination of amounts, there is some powder left over. Does the law of conservation of mass still apply in this situation? Why or why not?...