Understanding Auto-Ionization, Concentration, and pH

What ions are formed when water undergoes auto-ionization?

• Ammonium and nitrate ions

• Carbonate and bicarbonate ions

• Sodium and chloride ions

• Hydronium and hydroxide ions

What is the molarity of hydrogen ions in pure water at 25 degrees Celsius?

• 1 x 10^-9 M

• 1 x 10^-5 M

• 1 x 10^-7 M

• 1 x 10^-3 M

Which solution has a higher hydrogen ion concentration than pure water?

• Bleach

• Orange juice

• Seawater

• Distilled water

What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-4 M?

• 12

• 7

• 4

• 10

What does a pH of 7 indicate about a solution?

• It is basic

• It is alkaline

• It is acidic

• It is neutral

How does the pH scale categorize a solution with a pH below 7?

• Neutral

• Acidic

• Alkaline

• Basic

What happens to the hydrogen ion concentration as you move to the right on the pH scale?

• It decreases

• It increases

• It fluctuates

• It remains constant

What is the pH of bleach if its hydrogen ion concentration is 1 x 10^-12 M?

• 2

• 7

• 10

• 12

What is the relationship between pH and hydrogen ion concentration?

• Directly proportional

• Inversely proportional

• Unrelated

• Exponentially proportional

What does a logarithmic pH scale imply about the change in hydrogen ion concentration?

• It remains constant

• It changes linearly

• It changes exponentially

• It changes randomly