Separating Mixtures

What is solubility?

• The ability of a substance to evaporate in a solvent.

• The ability of a substance to dissolve in a solvent, such as water.

• The ability of a substance to freeze in a solvent.

• The ability of a substance to change color in a solvent.

What is the best method to separate small pebbles from sand?

• Pour the sand and pebbles through a screen with small holes.

• Use a magnet to attract the pebbles.

• Soak the mixture in water and let it settle.

• Sift the mixture through a coarse net.

What is a mixture?

• A combination of two or more substances that are chemically bonded.

• A combination of two or more substances that are not chemically bonded and can be separated by physical means.

• A single substance that cannot be separated into its components.

• A solution where one substance is dissolved in another.

What happens to sugar when it dissolves in water?

• It remains in solid form and does not mix with water.

• It breaks down into smaller particles and spreads throughout the water.

• It forms a layer on the surface of the water.

• It reacts chemically with water to create a new substance.

What is the role of a solvent in a solution?

• A solvent is the substance that dissolves the solute, forming a solution.

• A solvent is the substance that is dissolved in a solution.

• A solvent is a type of solute that enhances the solution's properties.

• A solvent is a mixture of different solutes.

What is the difference between a mixture and a compound?

• A mixture is a physical combination of substances, while a compound is a chemical combination of elements.

• A mixture is a chemical combination of substances, while a compound is a physical combination of elements.

• A mixture contains only one type of element, while a compound contains multiple types of elements.

• A mixture can be separated by physical means, while a compound cannot be separated by physical means.

What property is used to separate sand and pebbles in a sieve?

• Color - The sieve separates particles based on their color.

• Size - The sieve allows smaller particles (sand) to pass through while larger particles (pebbles) remain.

• Shape - The sieve sorts particles based on their shape.

• Weight - The sieve differentiates particles based on their weight.

What is filtration?

• A process to combine liquids and gases

• A method to separate solids from liquids or gases using a filter

• A technique to purify air by removing dust

• A way to heat liquids to evaporate them

What is an example of a method to separate a mixture based on size?

• Sifting - Using a sieve to separate flour from larger particles.

• Filtration - Using a filter paper to separate solids from liquids.

• Evaporation - Heating a solution to remove the solvent.

• Magnetism - Using a magnet to attract magnetic materials.

How can you make sugar dissolve faster in water?

• Stir the mixture - Stirring increases the interaction between sugar and water.

• Add more sugar to the water.

• Use cold water instead of hot water.

• Let the mixture sit without stirring.