pH scale and indicators

Front

What is the pH range of strong acids?

Back

Strong acids typically have a pH range of 0 to 3.

Front

What is the pH range of strong alkalis?

Back

Strong alkalis typically have a pH range of 11 to 14.

Front

What is the pH range of weak acids?

Back

Weak acids typically have a pH range of 4 to 6.

Front

What is the pH range of weak alkalis?

Back

Weak alkalis typically have a pH range of 7 to 10.

Front

What does a pH of 7 indicate?

Back

A pH of 7 indicates a neutral solution, such as pure water.

Front

What is the role of indicators in chemistry?

Back

Indicators are chemical dyes that change color according to the pH of a solution.

Front

What ion is present in all alkalis?

Back

All alkalis contain hydroxide ions (OH-).

Front

What is the significance of the pH scale?

Back

The pH scale measures the acidity or alkalinity of a solution, ranging from 0 (acidic) to 14 (alkaline).

Front

How does the concentration of hydrogen ions relate to pH?

Back

The pH scale is logarithmic; a decrease of 1 in pH represents a tenfold increase in hydrogen ion concentration.

Front

What is a common example of a strong acid?

Back

A common example of a strong acid is hydrochloric acid (HCl).