2.2 Solutions

2.1 Recap of lesson 2.1

Remember;

• Mixtures are made up of several substances

• In compounds, atoms are strongly joined together, you would need a chemical reaction to separate them

• Homogenous mixtures are evenly mixed together, like soda

• Heterogenous mixtures are not uniform, not consistent, like oil & water

Multiple Choice

TRUE or FALSE

You brushed your teeth today

• TRUE

• FALSE

Multiple Choice

Page 72;

TRUE or FALSE

Toothpaste is a mixture

• TRUE

• FALSE

Multiple Choice

TRUE or FALSE;

A mixture is a physical combination of two or more substances that are chemically joined together

• TRUE

• FALSE

Multiple Choice

Page 72; What can you use to separate a mixture of Sulphur and Iron?

• Magnet

• Electricity

• Stick

• Water

Multiple Choice

Page 72; True or false;

In compounds, atoms of different elements are strongly joined together

• TRUE

• FALSE

Multiple Select

Google this;

What is a compound?

• A compound is a material formed by chemically bonding two or more chemical elements

• a substance made from two or more different elements that have been chemically joined.

• A compound is a pure substance that can be broken down into elements

• any substance composed of identical molecules consisting of atoms of two or more chemical elements

• a substance formed when two or more chemical elements are chemically bonded together.

Multiple Choice

Mixtures or compounds?

They are impure substances.

• Mixtures

• Compounds

Multiple Choice

Mixtures or compounds?

The constituents are present in varying ratios.

• Mixtures

• Compounds

Multiple Choice

Mixtures or compounds?

The constituents can be separated only by chemical methods.

• Mixtures

• Compounds

Multiple Choice

What is salad?

• element

• compound

• mixture

Multiple Choice

The graph shows the temperature rise of two substances over a period of time.

Which of the two is pure? Why?

• Green substance, melting section is continuous

• Red substance, melting section is conntinous

• Green substance, melting section is sharp

• Red substance, melting section is sharp

Multiple Choice

Which of the following best describes chicken noodle soup

• element

• compound

• mixture

• solution

Multiple Choice

What is the chemical formula for water?

• NaCl

• CO₂

• NH₃

• H₂O

Multiple Choice

Classify the picture with the correct label.

• Element

• Compound

• Mixture of Elements

• Mixture of Compounds

Multiple Choice

A mixture that appears to be evenly mixed throughout:

• an atom

• a compound

• a homogeneous mixture

• a heterogeneous mixture

Multiple Choice

Example of a homogeneous mixture

• sweet tea

• pizza

• guacamole

• helium

Multiple Choice

A ______________ mixture is one that does not have a uniform composition.

• heterogeneous

• homogenous

• pure substance

Multiple Choice

You are eating a pizza. What type of mixture are you consuming?

• homogeneous

• heterogeneous

• pure substance

• The Periodic Table

Multiple Choice

An element is made up of only one kind of _____.

• isotope

• plastic

• atom

• metal

2.2 Solutions

Lesson objectives;

At the end of this lesson, you'll be able to;

• Describe solutions using key words

• Use the particle model to explain dissolving

Multiple Choice

Page 74; What is a solution?

• A mixture of a solid

• A mixture of a liquid

• A mixture of a liquid with a solid

• A mixture of a liquid with a solid or a gas

Multiple Choice

True or false; Page 74

In a solution, all parts of the mixture are the same

• TRUE

• FALSE

Multiple Choice

True or false; Page 74

In a solution, you can see the separate substances

• TRUE

• FALSE

Multiple Choice

True or false; Page 74

Can you see sugar in a solution?

• YES

• NO

• MAYBE

Multiple Choice

Page 74

In a water & sugar solution the water is the _______

• Solute

• Solvent

• Solution

Multiple Choice

Page 74

In a water & sugar solution the sugar is the _______

• Solute

• Solvent

• Solution

Multiple Choice

Page 74; TRUE or FALSE

You must never taste things in a laboratory, they may be poisonous

• TRUE

• FALSE

• It depends

Multiple Choice

Page 74; Some solutions are colored

• TRUE

• FALSE

Multiple Choice

Page 74; Coffee solution is _____ and copper sulphate solution is ____

• brown, blue

• blue, brown

Multiple Choice

Page 74; The color of a solution shows that the ______ is there.

• solute

• solvent

• solution

• sugar

Multiple Choice

Identify the solute in a coffee solution;

• The coffee

• The sugar

• The water

• The cup

Multiple Choice

Look at the diagram. In this diagram, the red dots represent

• the solute

• the solvent

• the solution

Multiple Choice

Look at the diagram. In this diagram, the blue area represents

• the solute

• the solvent

• the solution

Multiple Choice

TRUE or FALSE

Nail varnish dissolves in water

• TRUE

• FALSE

Multiple Choice

Nail varnish remover is mainly

• water

• fuel

• propane

• propanone

Multiple Choice

Page 75; TRUE or FALSE

All glues are solutions

• TRUE

• FALSE

Multiple Choice

Page 75; How is glue able to dry on surfaces

• As the solvent evaporates, the glue dries

• As the solute evaporates, the glue dries

• As the solution evaporates the glue dries

• The glue evaporates

Multiple Select

Which of the following are found in a soda solution?

• Carbondioxide

• Sugar

• Water

• Beans

Multiple Choice

Ice is a;

• Solute

• Solvent

Multiple Choice

Water is the universal ____.

• solute

• solvent

• solution

Multiple Choice

• solvent

• solute

Multiple Choice

• solute

• solvent

Multiple Choice

Solutes dissolve quicker if you stir them.

• true

• false

Multiple Choice

Solutes dissolve quicker in _________ water.

• cold

• warm

Multiple Choice

• solute

• solvent

• solution

Multiple Choice

The substance being dissolved in a solution.

• sands

• solute

• solvent

• alloy

Multiple Choice

The substance in which a solute is dissolved

• sands

• solvent

• alloy

• negative particles

Multiple Choice

Angie mixes the fertilizer for her plants at the beginning of the week. She puts 40 g of the fertilizer-water solution in each of seven closed containers and uses one container each day to water her plant.

One day, she goes outside to get a container and finds that the solution in it is frozen. How much mass should the frozen solution in the container have?

• 20 grams

• 0 grams

• 40 grams

• 10 grams

Multiple Choice

If a solid that has a mass of 25 grams melts, it should result in a _______ with a mass of _______ grams.

• liquid; 0

• liquid; 25

• solid; 25

• gas: 0

Multiple Choice

Jamie weighs a glass of water and observes its weight to be 12 ounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be theapproximate weight of the glass of water?

• 6 

• 12 

• 18 ounces

Homework;

1. Elisha has three buckets. Each bucket contains 50 liters of a colorless liquid but only one of them is water.

   Explain how Elisha can determine which of the three is water.

2. Make some homemade slushies or bubble solution.