Editing Universal indicator (section)

{{Short description|Indicator that works over a wide range of pH}}
{{About|the chemical pH indicator|the musical artists|Universal Indicator (collective)}}
[[File:Universal indicator paper.jpg|thumb|A roll of universal indicator paper]]
[[File:Skala boja 2.JPG|thumb|Colors of universal indicator]]

A '''universal indicator''' is a [[pH indicator]] made of a [[Solution (chemistry)|solution]] of several compounds that exhibit various smooth [[Color|colour]] changes over a wide range [[pH]] values to indicate the [[Acid|acidity]] or [[Alkali|alkalinity]] of solutions. A universal indicator can be in paper form or present in a form of a solution.<ref>{{cite book|last1=Walker|first1=Denise|title=Acids and alkalis|date=2007|publisher=Evans|location=London|isbn=978-0-237-53002-0|page=13|edition=1|url=https://books.google.com/books?id=nPnRO_mQymUC&pg=PA13 |access-date=4 June 2015}}</ref>