Dissolvability

What is the effect of water temperature on the rate of a substance's dissolution?

• Only cold temperatures affect dissolution

• Higher temperatures speed up dissolution

• Higher temperatures slow down dissolution

• Water temperature has no effect

According to the hypothesis, which water temperature will cause the substance to dissolve fastest?

• Cold water

• Room temperature water

• Warm water

• Boiling water

What was the average time it took for the substance to dissolve in hot water?

• 2 minutes and 30 seconds

• 1 minute and 10 seconds

• 3 minutes and 49 seconds

• 4 minutes

How did the results compare with the hypothesis?

• The results were opposite to the hypothesis

• The results did not support the hypothesis

• The results supported the hypothesis

• The hypothesis was partially correct

What scientific principle explains the effect of heat on solubility?

• Solubility is not affected by temperature

• Cold temperatures increase collision frequency

• Higher temperatures decrease molecular movement

• Higher temperatures increase molecular movement and collision frequency

What change was suggested to improve the fairness and accuracy of the experiment?

• Adding the substance at exactly the same time for each trial

• Using colder water for all trials

• Using a different substance

• Conducting the experiment in a vacuum

What is something that can happen that would cause an unfair test?

• The time is not measured correctly

• You use different amounts of water in each cup

• Some substance is spilled before being poured in

• All of these create an unfair test

What scientific language can be used when describing dissolving?

The process of dissolving

• dissolvability

• Dissolution

• Solution

• Universal solvent

solute + solvent =

• solution

• equation