pH indicators are usually weak acids or weak bases that change their color depending on their dissociation (protonation) state. Sometimes both forms are colored, sometimes only one. In most cases you may assume that to completely change color of bicolored indicator pH must change by 2 units. However, human eye is more sensitive to some colors than to others, thus some color changes can be perceived over wider pH range.
pH indicators can be used to check pH of the solution, although they are rarely added directly. Only in acid-base titrations indicator should be added to the solution. To check pH it is much more convenient to use pH strips. It is worth of noting here that pH strips are nothing else but pieces of paper impregnated with indicator or a mixture of indicators.
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Starch is not the indicator. Iodine is the indicator of starch.
cabbage juice is a natural pH indicator
yes .. we use methyl orange as an indicator ... when added it gives a straw yellow colour
An example of an indicator would be Phenol Red, or Universal Indicator. Depending on the pH range of the indicator and the pH range of the substrates you would use the appropriate indicator.
Jjjjj
Starch is not the indicator. Iodine is the indicator of starch.
cabbage juice is a natural pH indicator
Methyl red is an adequate indicator.
An indicator is use to detect the given object is acid or a base
With indicator papers the pH of a liquid is evaluated. Also many indicator papers are used for testing chemicals.
to indicate what the chemical is.
False
As a temp. indicator in thermometers.
yes .. we use methyl orange as an indicator ... when added it gives a straw yellow colour
Indicator is a process which is used to find out the substanceis acid,base and salt. example: litmus paper and termuric both are natural indicator. example of artificial indicator: mithyl orange and phenolphtaceil
An example of an indicator would be Phenol Red, or Universal Indicator. Depending on the pH range of the indicator and the pH range of the substrates you would use the appropriate indicator.