Universal Solvent - Factors Affecting Solubility - Concentration

Multiple Choice

Why is water called the universal solvent?

• Because it can dissolve anything

• Because it can dissolve more substances than any other liquid

• Because it cannot dissolve solids

Multiple Choice

How does water help move chemicals, minerals, and nutrients?

• By carrying them as it moves

• By staying still

• By evaporating

Multiple Choice

What are water molecules made of?

• One hydrogen atom and two oxygen atoms

• Two hydrogen atoms and one oxygen atom

• One oxygen atom only

Multiple Choice

How do the charges on a water molecule help it dissolve other substances?

• Water molecules do not interact with any charged particles

• The positive and negative charges attract other molecules

• The charges make water heavie

Multiple Choice

What happens to salt when it is added to water?

• Salt increases the boiling point of water without dissolving.
• It separates into sodium and chlorine atoms

• Salt sinks to the bottom of the water.
• Salt forms a solid layer on the surface of the water.

Multiple Choice

Why do sodium and chlorine atoms separate in water?

• Sodium and chlorine atoms combine to form a solid in water.
• Water molecules repel sodium and chlorine, keeping them together.
• Sodium and chlorine atoms dissolve in water without separating.
• Because of the attraction between the atoms and water’s charges

Multiple Choice

What type of solution is formed when salt dissolves in water?

• Homogeneous solution

• Heterogeneous solution

• A saturated solution
• A colloidal solution

Multiple Choice

Why doesn't oil dissolve in water?

• Because oil is lighter than water

• Because the atoms in oil are strongly attracted to each other

• Because oil is hot

Multiple Choice

What are insoluble substances?

• Substances that dissolve easily in water

• Substances that do not dissolve in water

• Substances that evaporate quickly

• Insoluble substances are always solid at room temperature.

Multiple Choice

What does solubility mean?

• How well a solvent can freeze

• How well a solute will dissolve into a solvent

• How heavy a substance is

Multiple Choice

Can you give n example of a soluble and an insoluble substance?

• Oil is soluble, salt is insoluble

• Sand is soluble, salt is insoluble

• Salt is soluble, sand is insoluble

​https://www.youtube.com/watch?v=qL5-lcc_TfY

Multiple Choice

What is concentration?

• The amount of solvent compared to solute

• The amount of solute compared to solvent

• The amount of heat in a solution

Multiple Choice

How does adding more solute affect the concentration of a solution?

• It decreases concentration

• It has no effect

• It increases concentration

Multiple Choice

What happens when the concentration becomes too high?

• The solute dissolves faster

• The solute stops dissolving

• The solvent evaporates

Multiple Choice

How does temperature affect solubility?

• Higher temperature decreases solubility

• Higher temperature increases solubility for solids

• Temperature has no effect on solubility

Multiple Choice

Why does heating a solvent allow it to dissolve more solids?

• The particles move slower

• The particles move faster and collide more

• The solvent changes color

Multiple Choice

What happens to gas solubility when temperature increases?

• It increases

• It stay same

• It decreases

Multiple Choice

How does pressure affect the solubility of gases?

• Increasing temperature decreases the solubility of gases.
• Pressure has no effect on gases

• Higher pressure decreases gas solubility

• Higher pressure increases gas solubility

Multiple Choice

Why is soda fizzy when it is pressurized?

• The pressure adds more water

• The pressure allows more carbon dioxide to dissolve

• The soda is frozen

Multiple Choice

How does the size of solute particles affect solubility?

• Larger particles dissolve faster

• Smaller particles dissolve faster

• Size has no effect on solubility

Multiple Choice

Why does a sugar cube dissolve more slowly than powdered sugar?

• The sugar cube is colder

• The solvent can only dissolve the outside surface of the sugar cube

• The sugar cube is sweeter

Multiple Choice

What does "concentration" mean?

• How much liquid is dissolved in a solid

• How much solid is dissolved in a liquid

• How much heat is needed for a solution

• How fast the solid dissolves

Multiple Choice

How can we describe a solution?

• With colors and shapes

• With temperature

• With words and numbers

• With sounds and smells

Multiple Choice

What is true about a concentrated solution?

• It has a lot of liquid and very little solid

• It has a lot of solid and very little liquid

• It has an equal amount of solid and liquid

• It has no solid and only liquid

Multiple Choice

What does it mean to "dilute" a solution?

• Add more solid to make the solution stronger

• Add more liquid to make the solution weaker

• Take out all the solid from the solution

• Heat the solution to make it thicker

Multiple Choice

If 5 grams of sugar are dissolved in 500 ml of water, how would we describe it?

• 5g/100ml

• 1g/100ml

• 2g/100ml

• 10g/100m

Multiple Choice

If a solution has 1 gram of solid in 100ml of liquid, what percentage solution is it?

• 1%
• 0.5%
• 5%

• 10%

Multiple Choice

If you mix 50g of hot chocolate powder with 250ml of water, what is the concentration?

• 10%

• 20%

• 40%

• 50%

Multiple Choice

How can you make a hot chocolate solution more concentrated?

• Add less powder to the same amount of water

• Add more water to the same amount of powder

• Add more powder to the same amount of water

• Heat the water to a higher temperature

Multiple Choice

What is the concentration if you mix 25g of hot chocolate powder with 250ml of water?

• 10%

• 20%

• 40%

• 50%