Exploring Acids, Bases, and the pH Scale

What is an example of a mixture?

• Water

• Oxygen

• Salt water

• Carbon dioxide

What distinguishes a mixture from a molecule?

• Mixtures have fixed proportions.

• Molecules can vary in proportions.

• Molecules are always liquids.

• Mixtures do not have fixed proportions.

Which type of mixture settles out over time?

• Compounds

• Colloids

• Solutions

• Suspensions

What effect is used to identify colloids?

• Newton's effect

• Tyndall effect

• Einstein effect

• Bohr effect

What are the two components of a solution?

• Solution and suspension

• Solute and mixture

• Solvent and mixture

• Solvent and solute

What does it mean if a solution is saturated?

• It is not mixed well.

• It cannot dissolve more solute.

• It is a pure substance.

• It can dissolve more solute.

What ion concentration is higher in acidic solutions?

• Sodium ions

• Chloride ions

• Hydroxide ions

• Hydronium ions

Which scale is used to measure how acidic or basic a solution is?

• Richter scale

• Decibel scale

• pH scale

• Kelvin scale

What is the pH value of neutral solutions?

• 7

• 10

• 0

• 14

What happens to the concentration of hydronium ions when the pH value decreases by 1?

• It decreases by a factor of 10.

• It remains the same.

• It increases by a factor of 10.

• It decreases by a factor of 100.