Difference between revisions of "PH Indicator"
(Created page with "==Key Stage 3== ===Meaning=== A '''pH Indicator''' is a dye which changes colour depending on the pH of its environment. ===About pH Indicators=== : The colour of...") |
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: The [[colour]] of a '''pH indicator''' can be used to tell the [[pH]] of a [[solution]]. | : 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. | : 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 | + | : A good '''pH indicator''' can be added to [[solution]] without affecting the [[pH]] of the [[solution]]. If a '''pH indicator''' changed the [[pH]] of a [[solution]] it could not give an [[accurate]] [[reading]]. |
Some '''pH indicators''' you should know: | Some '''pH indicators''' you should know: | ||
*[[Litmus Paper]] | *[[Litmus Paper]] | ||
| Line 18: | Line 18: | ||
{| class="wikitable" | {| class="wikitable" | ||
| − | |+ These are the colour ranges of different | + | |+ These are the colour ranges of different pH indicator plants. |
|- | |- | ||
|[[File:NaturalIndicators.png|center|600px]] | |[[File:NaturalIndicators.png|center|600px]] | ||
|- | |- | ||
| + | |} | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | A '''pH indicator''' is a [[dye]] which changes colour depending on the [[concentration]] of [[Hydrogen Ion (Chemistry)|H<sup>+</sup>]] or [[Hydroxide Ion (Chemistry)|OH<sup>-</sup> ions]] in [[solution]]. | ||
| + | |||
| + | ===About pH Indicators=== | ||
| + | : '''pH indicators''' are used to determine the [[pH]] of a [[solution]]. | ||
| + | : Different '''pH indicators''' have a different range of effectiveness. Some only have two colours and change between them at a very specific [[pH]]. Others can have many different colours over a range of [[pH]] values. | ||
| + | {| class="wikitable" | ||
| + | |+ These are the colour ranges of some common pH indicators. | ||
| + | |- | ||
| + | |[[File:pHIndicators.png|center|600px]] | ||
|} | |} | ||
Revision as of 11:13, 7 January 2019
Contents
Key Stage 3
Meaning
A pH Indicator is a dye which changes colour depending on the pH of its environment.
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 pH indicator can be added to solution without affecting the pH of the solution. If a pH indicator changed 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
 |
Key Stage 4
Meaning
A pH indicator is a dye which changes colour depending on the concentration of H+ or OH- ions in solution.
About pH Indicators
- pH indicators are used to determine the pH of a solution.
- Different pH indicators have a different range of effectiveness. Some only have two colours and change between them at a very specific pH. Others can have many different colours over a range of pH values.
 |