Solubility and Temperature Relationships

This tutorial introduces solubility curves, explaining how to interpret graphs that show the solubility of various substances in water at different temperatures. It covers the axes of the graph, how to read and compare solubility data, and provides practice problems. The tutorial also discusses the solubility of gases and how it decreases with increasing temperature. The session concludes with a preview of the next tutorial, which will cover problems involving different volumes of water.

What is the role of the solvent in a solubility curve?

• It is the substance being dissolved.

• It determines the temperature range of the graph.

• It is the substance in which the solute is dissolved.

• It is always a solid.

Why does the temperature range on the solubility graph go from 0 to 100 degrees Celsius?

• Because these are the freezing and boiling points of water.

• Because it is the most common temperature range.

• Because solutes dissolve best in this range.

• Because it is the range for all solvents.

How many grams of KI can dissolve in 100 milliliters of water at 29 degrees Celsius?

• 140 grams

• 150 grams

• 155 grams

• 160 grams

Which solute is more soluble at 29 degrees Celsius, KI or KNO3?

• KI

• Both are equally soluble

• KNO3

• Neither is soluble

At 50 degrees Celsius, how many grams of NaNO3 can dissolve in 100 milliliters of water?

• 125 grams

• 115 grams

• 110 grams

• 120 grams

What is the solubility of KCl at 35 degrees Celsius in 100 milliliters of water?

• 30 grams

• 35 grams

• 40 grams

• 45 grams

What happens to the solubility of gases as the temperature increases?

• It fluctuates randomly.

• It remains the same.

• It decreases.

• It increases.

Why do gases become less soluble in hot water?

• Because hot water evaporates quickly.

• Because gases prefer cold environments.

• Because hot water particles are further apart.

• Because hot water particles are closer together.

How can you identify gases on a solubility graph?

• Their lines go upwards with temperature.

• Their lines remain flat.

• Their lines go downwards with temperature.

• Their lines are always at the top of the graph.

What will the next tutorial focus on?

• Advanced graph reading techniques.

• Solubility of solids in different solvents.

• The history of solubility curves.

• Problems involving proportions with solubility curves.