GS BEST PRACTICE Mixtures

Match the following

• Separate based on boiling points

• Evaporation

• Separate dissolved substances from liquids

• Centrifugation

• Separate by passing through a medium

• Filtration

• Separate based on densities

• Distillation

Match the following

• evaporating dish

• 
• distillation flask

• 
• centrifuge

• 
• filter funnel and paper

• 

Given below are the mass of sugar and the volume of water in each solution. Arrange the solutions from most dilute to most concentrated.

• Mass of sugar: 10 g

  Volume of water: 5 mL

• Mass of sugar: 5 g

  Volume of water: 4 mL

• Mass of sugar: 10 g

  Volume of water: 15 mL

• Mass of sugar: 2 g

  Volume of water: 2 mL

• Mass of sugar: 2 g

  Volume of water: 10 mL

A student was given the task of separating a mixture of sand and sodium chloride (table salt). Arrange the following steps in the order that the student should take.

• The mixture is poured through a filter. The sand is separated.

• Water is added and the mixture is stirred.

• The water is evaporated. The salt is left behind.

• The salt dissolves in water, the sand does not.

A student was trying to dissolve of cerium sulfate in a 60°C water. What is the maximum mass can she possibly dissolve in the water?

• 20 g

• 10 g

• 0 g

• 40 g

A student was trying to dissolve completely all of 20 grams of cerium sulfate in water. What temperature of water would be best to do this?

• 0°C

• 25°C

• 30°C

• 40°C

Match the following methods to the reasons why they make solids dissolve faster in liquids.

• increases the amount of contact the solute has

  with the solvent

• Heating

• causes the solute particles to

  separate from one another and

  spread out more quickly

• Mixing

• causes particles to

  move more quickly

• Crushing

The statement below is false. Replace the underlined term to make a true

statement.

In a coffee-water solution, coffee is the solvent.

Match the following

• Suspension

• 
• Solution

• 
• Colloid

• 

Match the following

• Solution

• 
• Suspension

• 
• Colloid

•