Solutions Y7

Study notes

Define Soluble and Insoluble

Soluble substances can dissolve in a solvent. Insoluble substances cannot dissolve in a solvent.

Is flower soluble or insoluble in water?

Insoluble

True or False: A solution with a substance dissolved in it weighs less the a solution and a undissolved substance.

False. They would weigh equally due to conservation of mass.

What is the difference between a solute and a solvent?

A solute is the substance that is dissolved in a solution, while a solvent is the substance that dissolves the solute.

Step by step of how you find if one of two beakers of water contain salt.

1. Heat both beakers over a Bunsen Burner, on top of a tripod and gauze.

2. Light the Bunsen Burner

3. Turn off the Bunsen Burner once the majority of the solution has evaporated from both beakers.

4. Leave the Beakers in a warm, dry place for a week

5. Observe the results

   (One Beaker should have a collection of obvious salt crystals)

How can you tell if a solute is still present in a solution, even if it cannot be seen?

You could boil the solution.

Define solubility

Solubility is the ability of a solute to dissolve in a solvent.

Define Saturated.

A saturated solution is one in which no more solute can dissolve in the solvent at a given temperature.

What is the mass of sugar at 90deggrees

410deggrees

How do you extract salt from rock salt?

1. Crush up the rock salt using a Mortar and Pestle .

2. Place the crushed up rock salt into a Beaker and add Water

3. Stir the mixture with a Glass Stiring Rod to help it dissolve.

4. Filtre the mixture with Filtre Paper placed inside of a Conicla Flask.

5. Heat the filtered solution over a Bunsen Burner (place the mixture in an evaporating basin before hand) until the majority of the solution has dissolved and salt crystals have begun to form.

6. Leave in a warm, dry place for a week.

7. Observe Results

True or false: A substance can be soluble or insoluble depending on the solvent.

True

Name a number of liquids that can be used as solvents.

Water, Ethanol, Acetone etc.

Give an example of how not all substances will dissolve in specific substances.

Water and Nail polish.