Physical Science Concentrations & Dilutions

Define Concentration

• It is the ratio of the amount of a "solute" compared to the amount of a "solvent" in a solution.

• It is the ratio of the amount of a "solvent" compared to the amount of a "solution" in a "solute"

• It is the ratio of the amount of a base substance compared to an acid substance in a solution.

• It is the ratio of the number of "moles" in a solution compared to the "molarity".

When we say a solution is "unsaturated" the "concentration" of the solution is what?

• Higher than the maximum "solute" concentration

• Equal to the maximum "solute" concentration

• Unrelated to the "solute" concentration

• Lower than the maximum "solute" concentration

When we say a solution is "super-saturated" we are saying what exactly?

• A solution is super-saturated when it contains only "solute" and no solvent.

• A solution is super-saturated when it contains less "solute" than it would normally dissolve at a given temperature.

• A solution is super-saturated when it is at a lower temperature than the normal dissolving point.
• A solution is super-saturated when it contains more "solute" than it would normally dissolve at a given temperature.

Define "Molarity"

• Molarity is the mass of a "solute" per liter of solution.

• Molarity is the volume of "solute" per liter of solution.

• Molarity is the concentration of "solvent" per liter of solution.

• Molarity is the number of moles of "solute" per liter of solution.

If we know the number of "moles" in a solution and the volume in Liters what can we solve for?

• Pressure
• Density

• Temperature
• Concentration (Molarity)

If we know the Concentration "Molarity" and the number of "moles" what can we solve for in an equation?

• Pressure of the solution
• Volume of the solution

• Color of the solution
• Temperature of the solution

What is the System International unit of measure symbol for "molarity"?

• G
• K
• M
• L

What is the System International unit of measure symbol for number of moles in a solution?

• mol
• M

• g
• mL

What is considered the universal "solvent" in science?

• HCl

• Water
• Isopropyl Alcohol

• Sodium bicarbonate

Define the term "dilution"

• Dilution is the process of reducing the concentration of a solute in a solution by adding more solvent.
• Dilution is the process of converting a solid into a liquid form.
• Dilution refers to the separation of a solute from a solvent in a solution.
• Dilution is the process of increasing the concentration of a solute in a solution by adding more solvent.