Mixtures, Solutions and Solubility Curves

Solubility & Solubility Curves

What is a SOLUTION: a homogenous mixture in which the substances are evenly mixed.

• Solute: the substance being dissolved

• Solvent: the substance doing the dissolving

Multiple Choice

When making kool aid, the flavor mix is the

• solute

• solvent

Multiple Choice

When making kool aid the water is the

• solute

• solvent

It is important to remember that solubility of a solid is related to temperature.

• Higher temperature = increase in solubility

• Lower temperature = decrease in solubility

Temperature and solubility curves

As the temperature of a solution changes, the maximum amount of solute that can be dissolved will also change.

Solubility curves are used as a reference tool. They tell you how much solute will dissolve in a solvent at a certain temperature. They also allow you to see how solubility changes with temperature.

Multiple Choice

How many grams of ammonium chloride (NH₄Cl) will dissolve at 60 ^o C?

• 70 g

• 40 g

• 55 g

Multiple Choice

How many grams of potassium nitrate (KNO₃) will dissolve at 30 ^o C?

• 47 g

• 10 g

• 18 g

Multiple Choice

How many grams of sodium nitrate (NaNO₃) will dissolve at 70 ^o C?

• 55 g

• 78 g

• 134 g