Question

During chemistry lab, Mrs. Black’s students placed an antacid tablet in a zip lock bag. They recorded the mass of the tablet in the bag. Then they carefully added 50 grams of water and quickly sealed the bag. The tablet began to fizz and soon disappeared. The bag was filled with gas and it felt cold to the touch.
What type of change occurred in the bag and how can you support your answer?

Answer 1

A)
It is a physical change because the tablet dissolved.
B)
It is a physical change as evidenced by change in temperature.
C)
It is a chemical change due to the change in temperature and gas production.
D)
It is a chemical change because the tablet dissolved and the temperature of the liquid dropped.

Answer 2

@Kyliejones what do you think?

Answer 3

What are the types of changes you see?

Answer 4

Ds nuts

Answer 5

Can someone answer this?

Answer 6

@jackmullen55

Answer 7

Ya I think so

Answer 8

Thank you (:

Answer 9

Things dissolving are a physical change, but, you see gas given off as the materials in the tablet react in the water.
The fizzing is a chemical change. Alka Seltzer (a type of antacid) contains sodium hydrogen carbonate as well as citric acid, so when dissolved with water an acid base reaction takes place releasing CO2 gas.

Answer 10

Thank you so much, so then it would be a chemical change

Answer 11

Yes

Answer 12

So either C or D?

Answer 13

I believe that it is C

Answer 14

@Kyliejones