Understanding pH and Related Concepts

What is the mathematical definition of pH?

• The positive logarithm of the hydroxide ion concentration

• The positive logarithm of the hydrogen ion concentration

• The negative logarithm of the hydrogen ion concentration

• The negative logarithm of the hydroxide ion concentration

What does the 'P' in pH or pOH represent?

• Positive logarithm

• Negative logarithm

• Partial logarithm

• Proportional logarithm

How do pH and pOH relate to each other in terms of their sum?

• They add up to 10

• They add up to 1

• They add up to 7

• They add up to 14

What is the ion product of water (Kw) at 25 degrees Celsius?

• 1 x 10^-4

• 1 x 10^-14

• 1 x 10^-10

• 1 x 10^-7

If the pH of a solution is 7, what is the hydroxide ion concentration?

• 10^-7 M

• 10^-10 M

• 10^-14 M

• 10^-1 M

How can you determine if a solution is acidic or basic using pH?

• A pH greater than 7 is acidic

• A pH less than 7 is basic

• A pH less than 7 is acidic

• A pH equal to 7 is acidic

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

• 4

• 10

• 7

• 14

How much more acidic is a solution with a pH of 5 compared to a pH of 8?

• 500 times more acidic

• 10 times more acidic

• 1000 times more acidic

• 100 times more acidic

What type of scale is the pH scale?

• Linear scale

• Exponential scale

• Logarithmic scale

• Arithmetic scale

Which other scale is logarithmic and often mentioned in the news?

• Speed scale

• Weight scale

• Richter scale

• Temperature scale