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===About Indicators===
: Some [[indicator]]s '''indicators''' detect [[pH]] but others can be used to detect other [[chemical]]s.
Some non-pH '''indicators''' you should know:
*[[Iodine Solution]] - Used to detect starch.
*[[Biuret Solution]] - Used to detect proteins.
*[[Benedict's Test|Benedict's Solution]] - Used to detect simple [[sugar]]s like [[glucose]].*[[Limewater]] - Used to detect [[Carbon Dioxide]].
===About pH Indicators===
===Examples===
{| class="wikitable"
|+ These are the colour ranges of different '''indicator''' plants.
|-
|[[File:NaturalIndicators.png|center|600px]]
|-
|}
==Key Stage 4==
===Meaning===
An '''indicator''' is a [[dye]] that changes [[colour]] when other [[chemical]]s are present.
===About Indicators===
: Some '''indicators''' detect [[pH]] but others can be used to detect other [[chemical]]s.
Some non-pH '''indicators''' you should know:
*[[Iodine Solution]] - Used to detect starch.
*[[Biuret Solution]] - Used to detect proteins.
*[[Benedict's Test|Benedict's Solution]] - Used to detect simple [[sugar]]s like [[glucose]].
*[[Limewater]] - Used to detect [[Carbon Dioxide]].
===About pH Indicators===
: The [[colour]] of a '''pH indicator''' can be used to tell the [[pH]] of a [[solution]].
: Different '''indicators''' will have a different range of colours for different [[pH]] values.
: A good '''indicator''' can be added to [[solution]] without affecting the [[pH]] of the [[solution]]. If an '''indicator''' change the [[pH]] of a [[solution]] it could not give an [[accurate]] [[reading]].
Some '''pH indicators''' you should know:
*[[Litmus Paper]]
*[[Red Cabbage Indicator]]
*[[Universal Indicator]]
*[[Phenolphthalein]]
*[[Methyl Orange]]
*[[Bromothymol Blue]]
===Examples===
{| class="wikitable"
|+ These are the colour ranges of different '''indicator''' plants.
|-
|}
===References===
====Edexcel====
:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Indicators (pH) page 52, GCSE Chemistry, Pearson, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Indicators (pH), page 196, GCSE Combined Science, Pearson Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Indicators, page 43, 65, 110, GCSE Chemistry; The Revision Guide, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Indicators, pages 105, 209, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Indicators, pages 118-120, 131, 132, 185, 186, 205, 323, GCSE Chemistry, CGP, Edexcel '']
====OCR====
:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Indicators, pages 112, 114, 220, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
:[https://www.amazon.co.uk/gp/product/1782945679/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945679&linkCode=as2&tag=nrjc-21&linkId=a2db42f7b4bdf10cafaafa3bb9120940 ''Indicators, pages 43, 64, 81, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR '']
:[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Indicators, pH, pages 112, 113, 119, 166, 199, 275, Gateway GCSE Chemistry, Oxford, OCR '']