Tutoring - Solutions/Separating mixtures

Tutoring - Solutions/Separating mixtures

Multiple Choice

• element
• compound
• mixture of elements
• mixture of compounds

Multiple Choice

• element
• compound
• mixture of elements and compounds
• mixture of compounds

Multiple Choice

• element
• compound
• mixture of elements
• mixture of compounds and elements

Multiple Choice

• element
• compound
• mixture of elements
• mixture of compounds

Multiple Choice

• element
• compound
• mixture of elements
• mixture of compounds

Multiple Choice

This diagram represents...

• An element

• A molecule

• A compound

• A mixture of elements and compounds

Solution -

Solutions are homogeneous mixtures of two or more substances.

The solution consists of two parts: a solute and a solvent.

Solute = The substance being dissolved.

Solvent = The substance that is doing the dissolving

Examples of solutions:

Solutions can be mixtures in any phase. Each of these examples are homogeneous mixtures.

Remember homogeneous mixture means that you can not distinguish individual components of the mixutre; the composition is uniformed.

Multiple Choice

Ocean water is a solution?

• True
• False

Multiple Choice

A tablespoon of a substance is added to warm water and stirred. The result was that the substance could no longer

be seen.

We can conclude from the results that the substance –

• is less dense that water

• heated the water

• flavored the water

• dissolved in water

Multiple Choice

A mixture is always a solution, but a solution is NOT always a mixture. 

• True
• False

Multiple Choice

The part of a solution that dissolves.

• mixture
• solute
• solvent
• liquid

Multiple Choice

_____ means to spread out evenly in a liquid. 

• melt
• mix
• dissolve

Multiple Choice

Solutions are a special kind of mixture in which __________.

• Each object stays the same in the mixture

• substances are dissolved together

Poll

Water is not known as the universal solvent.

• True

• False

Open Ended

Why is water a universal solvent?

Separating Mixtures

There are many methods to separate out the different components to a mixture.

Evaporation: Separates solids from liquids

Filtration: Separates different size particles

Magnetic: Separates solids from solids

Multiple Choice

Which one of the following would you use to separate sand from iron filings?

• a bar magnet
• filter paper
• chromatography paper
• alum

Multiple Choice

This type of paper allows liquid to pass through it. What tool is it?

• sieve

• filter

Multiple Choice

To separate a mixture of salt and water what separation tool/method is used?

• Filter

• Sieve

• Magnet

• Evaporation

Evaporation

A technique used to separate a mixture (solution) of a soluble solid and the solvent.

Heat the solution until the liquid turns into a gas, and the solute will be left behind as a solid.

Filtration

This technique is used to separate mixtures that have particles that are different sizes.

Some filters are designed to separate stream water. They separate the water from the bacteria.

Mixtures with relatively large particle sizes, can be filtered through something like a coffee filter.

Magnetic

This technique uses a magnet to separate magnetic material from nonmagnetic material.

Multiple Choice

Sodium chloride can be separated from rock salt by first adding water to the mixture to dissolve the sodium chloride. The separation then takes place in two stages:

• evaporation followed by filtration
•  distillation followed by decanting
• filtration followed by evaporation
• filtration followed by decanting

Multiple Choice

Evaporation is good for separating a mixture (solution) of a soluble solid and a solvent. The process involves heating the solution until the solvent evaporates (turns into gas) leaving behind the solid residue.
Evaporation is good for separating a mixture (solution) of a soluble solid and a solvent.
True or False?

• False
• True

Multiple Choice

In filtration, the liquid part collected is called the filtrate and the solid bit that remained on the filter paper is called the residue.
In filtration, what is the part that remains in the filter paper called?

• Solid
• filtrate
• remainder
• residue

Multiple Choice

Filtration is a common method of separating an insoluble solid from a liquid. An example of a mixture is sand and water. This process involves the use of a filter paper placed in a filter funnel. The funnel is placed in a beaker and the mixture of water and sand is poured into the funnel. The liquid part drains through the filter paper into the beaker, leaving the solid sand particles trapped on the filter.
Filtration is a common method of separating an insoluble solid from a liquid.
True or False?

• True
• False

Multiple Choice

A cup of orange juice with pulp is poured into a glass. Which of these procedures could be done to separate the juice from the pulp?

• pour the juice through a coffee filter

• heat the juice in a pot until boiling

• pour the juice in another cup

• allow the mixture to settle, leaving the pulp at the bottom of the glass

Multiple Choice

Which mixture can be separated using a filter?

• sand and iron filings

• saltwater

• sand and water

• none of the above

Multiple Choice

Which tools are best for separating a mixtures of sand, iron filings, and water?

• Hot plate and filter

• Tweezers and filter

• Filter and magnet

• Magnet and hot plate

Multiple Choice

This method is utilized in industries like junkyards to remove metal scraps from other materials.

• chromatography

• physical manipulation

• use of magnet

• distillation

Multiple Choice

This method is used to separate metals from non metals.

• use of magnet

• physical manipulation

• sieving

• chromatography

Multiple Choice

The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as

• decanting
•  evaporation
• loading
• chromatography

Multiple Choice

To separate a mixture of salt and water what separation method is used?

• Filtration
• Distillation
• Chromatography
• Evaporation

Multiple Choice

To separate a mixture of soil and water what separation method is used?

• Filtration
• Distillation
• Chromatography
• Evaporation

Multiple Choice

Name the separation technique shown in the diagram.

• evaporation

• distillation

• filtration