Law of Conservation of Mass PreLab

In your own words, what is the Law of Conservation of Mass?

Reorder the following steps of the lab:

• Record the mass of the empty flask and the balloon.

• Slip the open end of the balloon over the mouth of the flask, while keeping the baking soda from entering the flask.

• Pour about 15 mL of vinegar into the flask. Weight the flask & vinegar, subtract the flask weight to find the weight of your vinegar.

• Weight the whole system and record the mass.

• Weigh the empty balloon

Place the reactants and products under the correct heading.

Groups:

(a) Reactants

,

(b) Products

• vinegar

• CH3COOH (aq)

• sodium acetate

• H2O (l)

• NaHCO3

• CO2 (g)

• NaC2H3O2

• baking soda

• carbon dioxide

• water

By tipping the balloon over while secured to the flask we are ensuring that no gas escapes. This is an example of a _________________________ system.

What is the last procedure of this lab?

What piece of lab equipment is used for measuring volume of a liquid?

What lab equmipent is used for measuring mass?

Read through the second page of the lab so that you familiarize with the data table you will be filling in while completing the lab. Have you read the second page?

• Yes

• No

• Turtle

• Apple