Solutions, Acids and Bases

 All of the following are examples of homogeneous mixtures EXCEPT

• Brass

• Beach sand

• Honey

• Air

Which best explains the difference between a solute and a solvent?

• A solute is a substance that is dissolved and a solvent is a substance that does the dissolving

• A solvent is a substance that is dissolved and a solute is a substance that does the dissolving

• A solvent is always a liquid and a solute is always a gas

• A solute is always a solid and a solvent is always a liquid

When making Kool-Aid, what is the purpose of agitating (stirring) the solution?

• To increase the rate at which the solvent dissolves in the solute

• To increase the rate at which the solute dissolves in the solvent

• To make it taste better

• To seed the solutions and initiate the process of crystallization

Chewing a Hershey’s candy most directly increases which factor that affects the rate at which the solute dissolves?

• Concentration

• Surface Area

• Agitation

• Temperature

Mel and Mike are two chemistry students trying to determine whether a household cleaning product is acidic, basic, or neutral. After a series of tests, they observed that the cleaning product turned red litmus paper blue and did not change the color of blue litmus paper. They also found that a universal indicator test strip turned purple when a drop of the cleaner was added. Based on that evidence, which of the following is most likely true about the cleaning product?

• pH 3.0, acidic

• pH 3.0, basic

• pH 13.0, acidic

• pH 13.0, basic

A solute is that substance that:

• does the dissolving

• dissolves

• evaporates

• sublimates

A solvent is the substance that:

• does the dissolving

• dissolves

• evaporates

• sublimates

Using data shown, which of the following substances would you expect to be basic?

• Household cleaner

• wine vinegar

• honey

• sprite

Using data shown, which of the following substances would you expect to be acidic?

• hand soap

• eggs

• dish soap

• sprite

Tags

NGSS.MS-PS1-2

Using the given solubility curve, determine whether a solution made with 34 g of KCl at 20°C is:

• unsaturated

• strong

• saturated

• supersaturated