What's in the Bubbles?

Question 1

1. How would you define gas?

Answer 1

I would define gas as matter, a substance, or an element that has mass and no definite shape or volume. Gas is composed of widely spaced individual particles in constant motion.

Question 2

what happens when carbon dioxide and barium hydroxide mix

Answer 2

a white powdery precipitate is created

Question 3

what is a closed system

Answer 3

a system that is completely isolated from its environment.
(nothing goes in or out)

Question 4

what is a precipitate

Answer 4

a solid that forms as a result of a chemical reaction

Question 5

was citric acid+sodium bicarbonate producing carbon dioxide+why

Answer 5

yes, because a powdery white precipitate formed in the barium hydroxide

Question 6

what happened to the barium hydroxide during the reaction

Answer 6

• white and cloudy
• intense bubbling
• pieces of white powder were forming

Question 7

what happened to the barium hydroxide right after the reaction

Answer 7

• cloudy white mixture
• contains powder`

Question 8

what happened to the mixture after it was settled down for 15 minutes

Answer 8

liquid and powder started to separate

Question 9

what happened to the mixture after it was settled overnight?

Answer 9

• liquid and powder still separated but…
• liquid is completely clear (looks exactly like the barium hydroxide in the before stage)
• powder is an opaque white
• powder is very compact

Question 10

what did the whats in the bubbles experiment prove and why?

Answer 10

carbon dioxide was produced because a PRECIPITATE formed