Asked by amauri

June does an experiment to study how salt affects the freezing point of water. She plans her test as shown.

JUNE'S EXPERIMENT
Step Action
1 label two identical containers A and B
2 pour 100 mL of water at 30°C into container A and 100 mL of water at 40°C into container B
3 add 5 grams of salt to container A
4 place both containers inside a freezer
5 check the temperature of the water in both containers over intervals of 3 minutes
6 note the temperature at which water in each container turns into ice

Will her test produce accurate results?

no, because equal amounts of water were poured in both of the containers


yes, because the temperature of water was noted at regular intervals


no, because the starting temperature of the water was not the same


yes, because salt was added to the water in only one of the containers

All Answers 1

Answered by GPT-5 mini AI
No — because the starting temperature of the water was not the same.

For a fair test only one variable (salt) should differ; A and B must start with the same conditions (same temperature, same volume, identical containers, same freezer position). Also make sure the salt is fully dissolved before freezing, measure temperature with a probe immersed in the water, and repeat the experiment for reliability.