Understanding Solutions

What is a solution?

• A mixture with visible separate ingredients

• A mixture with the same ingredients, color, density, and taste throughout

• A mixture that cannot dissolve substances

• A mixture that only contains solids

What do sugar molecules do in a solution?

• They remain separate from water molecules

• They mix evenly among the water molecules

• They form a solid layer at the bottom

• They evaporate into the air

What is the effect of adding a few drops of red food coloring to the solution?

• It makes the solution cloudy

• It spreads the red color evenly

• It separates the sugar from the water

• It makes the solution solidify

In a sugar-water solution, what is the solvent?

• Sugar

• Water

• Air

• Salt

What do the positive ends of sugar molecules attract in the process of dissolving?

• Positive ends of water molecules

• Negative ends of water molecules

• Neutral molecules

• Other sugar molecules

What is the charge of the ends of water molecules that attract sugar molecules?

• Positive

• Negative

• Neutral

• Variable

What does it mean when a drink is labeled as "100 percent juice"?

• It contains 10 percent juice

• It contains no added water

• It contains 100 mL of juice per 100 mL of drink

• It contains 90 mL of juice per 100 mL of drink

At 20°C, which compound has the lowest solubility?

• Potassium nitrate

• Sodium chloride

• Potassium chloride

• Copper(II) sulfate

Which compound shows the greatest increase in solubility from 0°C to 100°C?

• Copper(II) sulfate

• Potassium bromide

• Potassium nitrate

• Sodium chlorate

What is the solubility of copper(II) sulfate at 100°C in g/100 g of water?

• 32.0

• 114

• 104

• 245