Unit 4 Part 2 Re-assessment Assignment

What are electrolytes primarily composed of?

• Carbohydrates

• Vitamins

• Proteins

• Salts

Are sports drinks always necessary after workouts?

• Only with meals

• Only before workouts

• No, not for short workouts

• Yes, always

Electrolytes are also knows as:

These are some examples of electrolytes mentioned in the video: Select all that apply

• Sodium

• Chloride

• Lithium

• Calcium

A gas has a solubility in water at 0°C if 1.6 g/L at a pressure of 2.0 atm. What pressure is needed to produce an aqueous solution containing 8.7 g/L of the same gas at 0°C?

• 10.875 atm
• 6.5 atm
• 3.8 atm
• 5.2 atm

A gas has a solubility in water at 6°C if 0.9 g/L at a pressure of 2.0 atm. What pressure is needed to produce an aqueous solution containing 9.5 g/L of the same gas at 6°C?

• 5.0 atm
• 21.11 atm
• 8.5 atm
• 15.75 atm

What is solubility?

• The ability of a substance to evaporate.

• The ability of a substance to freeze.

• The ability of a substance to dissolve in another and form a solution.

• The ability of a substance to react with oxygen.

What role does water play when dissolving salt?

• It acts as a solid.

• It acts as a gas.

• It acts as a solvent.

• It acts as a solute.

Why can water dissolve many substances?

• Because it is a solid.

• Because it is a polar molecule.

• Because it is a non-polar molecule.

• Because it is a universal solvent.

Why are oil and water not mixable?

• Because oil evaporates in water.

• Because water is too dense.

• Because oil has no charges for water molecules to interact with.

• Because oil is polar and water is non-polar.