Solutions, Acids and Bases Review

What is an acid?

• A substance that donates protons (H+) in a solution and has a pH less than 7.

• A substance that accepts protons (H+) in a solution and has a pH greater than 7.

• A neutral substance with a pH of 7 that does not affect protons.

• A substance that increases the concentration of hydroxide ions (OH-) in a solution.

What is the best choice to neutralize an acid like lemon juice?

• Baking soda (sodium bicarbonate), which is a base.

• Vinegar, which is also an acid.

• Salt, which has no effect on acidity.

• Sugar, which does not neutralize acids.

What is the role of indicators in acid-base chemistry?

• Indicators are substances that change color in response to the pH of a solution, helping to identify whether it is acidic or basic.

• Indicators are used to neutralize acids and bases in a solution.

• Indicators are chemicals that increase the temperature of a solution when added.

• Indicators are used to measure the concentration of a solution.

What happens to red litmus paper when it comes in contact with a base?

• It turns blue.

• It remains red.

• It turns green.

• It dissolves.

What is the pH scale?

• A scale that measures how acidic or basic a solution is, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

• A scale that measures the temperature of a solution, ranging from 0 to 100 degrees Celsius.

• A scale that indicates the concentration of dissolved oxygen in water, ranging from 0 to 20 mg/L.

• A scale that measures the electrical conductivity of a solution, ranging from 0 to 10 mS/cm.

What is an unsaturated solution?

• A solution that contains more solute than it can dissolve at a given temperature.

• A solution that contains exactly the amount of solute it can dissolve at a given temperature.

• A solution that contains less solute than it can dissolve at a given temperature.

• A solution that contains no solute at all.

What is the chemical formula for baking soda?

• NaHCO3 (Sodium Bicarbonate)

• KCl (Potassium Chloride)

• CaCO3 (Calcium Carbonate)

• Na2CO3 (Sodium Carbonate)

What is the pH of a neutral solution?

• 6.0

• 7.0

• 8.0

• 5.0

What is the significance of the pH of 7 in solutions?

• A pH of 7 indicates a neutral solution, meaning it is neither acidic nor basic.

• A pH of 7 indicates a highly acidic solution.

• A pH of 7 indicates a highly basic solution.

• A pH of 7 is the maximum pH level for any solution.

What is a saturated solution?

• A solution that contains the maximum amount of solute that can dissolve at a given temperature.

• A solution that contains no solute at all.

• A solution that can dissolve more solute at a higher temperature.

• A solution that has reached its boiling point.