Exploring the Law of Conservation of Mass Through Experimentation

The video demonstrates the law of conservation of mass using a vinegar and baking soda reaction. The experiment is set up in a sealed plastic bag to prevent gas escape, ensuring accurate mass measurement. Despite a slight change in mass, the video explains this is due to scale inaccuracy or human error, not a violation of the conservation law.

What does the law of conservation of mass state?

• Mass can be created and destroyed.

• Mass can only be created, not destroyed.

• Mass can change forms but not be created or destroyed.

• Mass can only be destroyed, not created.

Tags

NGSS.MS-PS1-5

Why is the reaction conducted in a sealed plastic bag?

• To keep the vinegar and baking soda separate.

• To measure the temperature change.

• To prevent the gas from escaping.

• To observe the color change.

What is the purpose of using a napkin in the experiment?

• To measure the amount of gas produced.

• To change the color of the reaction.

• To delay the reaction between vinegar and baking soda.

• To clean up any spills.

What was the initial mass of the vinegar and baking soda?

• 120 grams

• 100 grams

• 104 grams

• 110 grams

Tags

NGSS.MS-PS1-5

What indicates that a chemical reaction is occurring in the bag?

• The bag starts to fizz and gas bubbles form.

• The bag becomes cold.

• The bag changes color.

• The bag becomes hot.

Tags

NGSS.MS-PS1-2

What was the mass of the materials after the reaction?

• 100 grams

• 103 grams

• 104 grams

• 105 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What could be a reason for the slight change in mass observed?

• The bag was not sealed properly.

• The reaction did not complete.

• The scale used was not very accurate.

• The mass actually changed.

Tags

NGSS.MS-PS1-5

Why might the scale not show the exact mass change?

• It is a kitchen scale and not very precise.

• The gas escaped from the bag.

• The reaction was too fast.

• The bag was too heavy.

Tags

NGSS.MS-PS1-5

What is a potential source of error in this experiment?

• The color of the plastic bag.

• Human error in sealing the bag.

• The amount of baking soda.

• The type of vinegar used.

What would a more accurate scale show about the mass before and after the reaction?

• A slight increase in mass.

• A slight decrease in mass.

• No difference in mass.

• A significant difference in mass.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5