Solutions and Molarity

What is a solution?

• A heterogeneous mixture of two or more substances.

• A homogeneous mixture of two or more substances where one substance (solute) is dissolved in another (solvent).

• A pure substance that cannot be separated into simpler substances.

• A mixture of gases that cannot be separated by physical means.

What is a solute?

• The substance that is dissolved in a solution.

• A type of solvent used in chemical reactions.

• A mixture of two or more substances.

• A solid that forms from a solution during a chemical reaction.

What does it mean if a substance is soluble?

• It means the substance can be dissolved in a solvent.

• It means the substance can be mixed with other solids.

• It means the substance can be heated without changing state.

• It means the substance can be seen through.

What is the difference between a concentrated and a dilute solution?

• A concentrated solution has a small amount of solute relative to the solvent, while a dilute solution has a large amount of solute relative to the solvent.

• A concentrated solution has a large amount of solute relative to the solvent, while a dilute solution has a small amount of solute relative to the solvent.

• A concentrated solution contains only solid solute, while a dilute solution contains only liquid solute.

• A concentrated solution is always more expensive than a dilute solution.

What is a solvent?

• A substance that is dissolved in a solution.

• The substance in which the solute is dissolved, typically present in greater amount.

• A mixture of two or more substances that are not chemically combined.

• A chemical reaction that occurs in a liquid state.

What is molarity?

• A measure of temperature defined as the number of moles of solute per liter of solution.

• A measure of concentration defined as the number of moles of solute per liter of solution.

• A measure of pressure defined as the number of moles of solute per liter of solution.

• A measure of volume defined as the number of moles of solute per liter of solution.

What is the significance of a saturated solution?

• A saturated solution is one where no more solute can be dissolved at a given temperature.

• A saturated solution is one that contains only solid solute.

• A saturated solution is one that can still dissolve more solute.

• A saturated solution is one that is at a boiling point.

What is the relationship between solubility and temperature?

• Generally, solubility of solids increases with temperature, while solubility of gases decreases.

• Solubility of all substances increases with temperature.

• Solubility of solids decreases with temperature, while solubility of gases increases.

• Temperature has no effect on solubility.

What does it mean if a substance is insoluble?

• It means the substance can be dissolved in a solvent.

• It means the substance cannot be dissolved in a solvent.

• It means the substance is a solid at room temperature.

• It means the substance reacts with water to form a gas.

How do you calculate molarity?

• Molarity (M) = moles of solute / liters of solution.

• Molarity (M) = liters of solution / moles of solute.

• Molarity (M) = moles of solute x liters of solution.

• Molarity (M) = moles of solute + liters of solution.