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===About Red Cabbage Indicator===
: The colour of the '''red cabbage''' [[leaf|leaves]]s is caused by a [[dye]] that can change colour in different [[pH]].
{| class="wikitable"
|+ Red cabbage pH scale.
|-
|[[File:RedCabbagepHScale.png|center|200px600px]]
|-
|}
|+ Examples of the red cabbage indicator at different pH values.
|-
|[[File:RedCabbageIndicator.png|center|200px600px]]
|-
|}
===Making Red Cabbage Indicator===
: 1. Tear 20g of red cabbage leaf into small pieces and place into a 500ml [[beaker]].
: 2. Add 300ml of hot [[water]] to the [[beaker]].
: 3. Stir with a [[Glass Rod|glass rod]] for 3 minutes.
: 4. Place a [[funnel]] in a [[Conical Flask|conical flask]] and place some [[Filter Paper|filter paper]] in the [[funnel]].
: 5. [[Filtration|Filter]] the red cabbage and water [[mixture]] by pouring through the [[Filter Paper|filter paper]] into the [[Conical Flask|conical flask]].
: 6. The [[filtrate]] is your '''red cabbage indicator'''. You can use a [[pipette]] to add small amounts to [[solution]]s to find their [[pH]].