Understanding Mixtures and Solutions

A student mixes salt in water until it dissolves completely. What type of mixture is this?

• Heterogeneous

• Homogeneous

• Colloidal

• Suspension

Which mixture is better for clear soup: a homogeneous or heterogeneous one?

• Heterogeneous

• Homogeneous

• None

• Colloidal

A smoothie with visible fruit chunks is evaluated for texture. What type of mixture is this?

• Homogeneous

• Heterogeneous

• Colloidal

• Pure substance

Why is a homogeneous mixture ideal for medicine syrups?

• It looks colorful

• The particles are visible

• The ingredients are evenly mixed

• It’s easy to spill

You are asked to prepare a solution that looks uniform. What kind of mixture should you create?

• Heterogeneous

• Pure substance

• Homogeneous

• Suspended solid

A student stirs sugar into cold water and notes it dissolves slowly. How could solubility be increased?

• Use less sugar

• Add ice

• Increase water temperature

• Leave it still

Which action will NOT improve solubility?

• Heating the solvent

• Stirring the mixture

• Increasing solute size

• Using warm water

To dissolve cocoa faster in milk, which factor should be adjusted?

• Use cold milk

• Do not stir

• Heat the milk

• Use whole cocoa beans

Which factor affects how quickly salt dissolves in water?

• Shape of glass

• Time of day

• Water temperature

• Type of spoon

Why is stirring important in making powdered juice drinks?

• It adds color

• It spreads the solute evenly

• It cools the drink

• It prevents melting