Exploring the Law of Conservation of Mass with Vinegar and Baking Soda

The video tutorial demonstrates an experiment involving vinegar and baking soda. Students measure 20 ml of vinegar and 3.0 grams of baking soda, then mix them to observe a chemical reaction. The reaction produces gas, inflating a balloon and causing a slight decrease in mass due to the gas's upward force. The law of conservation of mass is explained, highlighting that mass is not lost but transformed into gas. Temperature changes from 61°F to 58°F are noted as indicators of a chemical reaction.

What was the initial volume of vinegar measured using the graduated cylinder?

• 10 milliliters

• 20 milliliters

• 30 milliliters

• 40 milliliters

Into what type of flask was the vinegar transferred?

• Test tube

• Volumetric flask

• Erlenmeyer flask

• Beaker

How much baking soda was measured out for the experiment?

• 2.0 grams

• 4.0 grams

• 1.0 grams

• 3.0 grams

What was used to transfer the baking soda into the balloon?

• A spoon

• A funnel

• A piece of paper

• A measuring cup

What indicated that a gas was produced during the reaction?

• Change in color

• Formation of bubbles and inflation of the balloon

• Change in temperature

• Change in smell

Tags

NGSS.MS-PS1-2

What happened to the mass of the system after the reaction?

• It doubled

• It remained the same

• It decreased slightly

• It increased

Tags

NGSS.MS-PS1-5

According to the law of conservation of mass, what happens to mass during a chemical reaction?

• It is doubled

• It is created

• It is destroyed

• It is neither created nor destroyed

Tags

NGSS.MS-PS1-5

Why did the mass appear to decrease after the reaction?

• The vinegar evaporated

• The gas produced pushed up on the balloon, reducing the force on the scale

• The scale was faulty

• Some mass was lost

Tags

NGSS.MS-PS1-5

What was the initial temperature before the reaction?

• 62 degrees Fahrenheit

• 58 degrees Fahrenheit

• 61 degrees Fahrenheit

• 60 degrees Fahrenheit

Tags

NGSS.MS-PS3-4

What was the temperature after the reaction?

• 62 degrees Fahrenheit

• 61 degrees Fahrenheit

• 60 degrees Fahrenheit

• 58 degrees Fahrenheit

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4