Answers26-27 CFISD TX-Chemistry A CRLab: Solubility

Lab: Solubility Answers

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1
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Which would allow you to add more powdered mix to the water?

A
Dissolve the powdered mix first because it increases solubility of the powdered mix.
B
Dissolve the powdered mix first because it is easier to stir when the water is cold.
C
Heat up the water first because it increases solubility of the powdered mix.
D
Heat up the water first because it is easier to stir when the water is hot.
2
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A glass thermometer.

A
shaking the thermometer before use
B
using the thermometer as a stirring rod
C
making sure that the liquid inside the thermometer is at eye level when taking the temperature
D
making sure that the bulb of the thermometer does not touch the bottom the beaker or the ice when taking the temperature
E
using the Celsius scale instead of the Fahrenheit scale when taking temperature readings
3

You are in a laboratory creating a new chocolate bar. You want to create the sweetest chocolate bar by maximizing the sugar concentration. You are doing this by adding the sugar to a chocolate mixture. Which would allow you to dissolve more sugar?

A
Stir the sugar more vigorously.
B
Add the sugar after heating the mixture.
C
Add the sugar after cooling the mixture.
D
Decrease the particle size of the sugar.
4

Which scenarios may be explained by the facts on the left? Check all that apply.

A
There is more dissolved oxygen in colder waters than in warm water.
B
There is less dissolved oxygen in colder waters than in warm water.
C
Fish life in the ocean is more abundant during the seaons with warmer water than seasons with cooler water.
D
If ocean temperatures rise, then the risk to the fish population increases.

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