M21 - Solutions

Michelle wants to quickly dissolve powdered soup mix in a pot of water. Which of the following are ways that can increase the rate of dissolution? Select all that apply.

• heating the mixture

• breaking any large chunks of the powdered mix

• adding more powdered soup mix

• stirring the mixture

• cooling the mixture

Which of the following would be least likely to help sugar dissolve in water?

• warming the solution

• shaking the solution

• crushing larger sugar crystals

• cooling the solution

What is the first step of the dissolving process when a sugar-water solution forms?

• Charged portions of the water molecules and sugar molecules repel, pushing them apart from each other.

• Oppositely charged parts of the sugar molecules and water molecules attract each other.

• Water molecules cause the sugar to become liquid and flow throughout the solution.

• Water molecules surround the sugar molecules and spread them throughout the solution.

Which word best describes a mixture that is 85 percent copper and 15 percent tin?

• alloy

• saturated

• solvent

• solute

Which of the following is a solution?

• milk

• chlorine

• salt water

• muddy water

Which of the following statements about grinding a solute into smaller particles is true?

• Grinding increases the surface area of the solute and slows down dissolving

• Grinding increases the surface area of the solute and speeds up dissolving

• Grinding decreases the surface area of the solute and slows down dissolving

• Grinding decreases the surface area of the solute and speeds up dissolving

In lemonade, sugar is a(n) _____ and water is the ____________.

• solution, solute

• solvent, solution

• solvent, solute

• solute, solvent

Which of the following will increase the solubility of a gas in a liquid? Select all that apply.

• decreasing the temperature

• decreasing the pressure

• stirring or shaking

• increasing the pressure

• increasing the temperature

If a solute crystallizes out of a solution when a seed crystal is added, what kind of solution is it?

• saturated

• unsaturated

• supersaturated

• dilute

According to the graph, if 25 g of sodium chlorate (NaClO₃) are dissolved in 100 g of water at 70°C, how would you describe the solution?

• saturated

• unsaturated

• supersaturated

• concentrated