The PH Scale

The pH scale show how (a)   or alkaline a solution is.

The higher the pH, the more ______ the solution.

• alkaline

• acidic

Pure water has a pH of (a)   .

You can use ________ to find the pH of a soultion.

• Universal Indicator

• pH scale

• Magnesium

Some plants like hibiscus flowers and red (a)   , contain chemicals that change colour when they are added to solutions of different pH.

Concentrated acids and alkalis are more ______ than dilute ones.

• smelly

• corrosive

• basic

• acidic