# Indicator solution

Indicators are used to gauge the pH of a solution. When an indicator is added to a solution it will change the colour of the solution. You can measure the pH by comparing with the corresponding Indicator chart.

Tips for use:

- Adding more than one indicator will give inaccurate pH measurements because the colours of the two indicators will mix.

## See also:

- Indicator chart
- Indicator paper
- pH meter
- Using chemistry parts