Acid Base indicators of Table M   *   What color will a solution turn with each indicator? 

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Each of the 6 indicators will change color depending upon what the solution pH it's put into has.  For each pH listed, look at table M, decide what color the solution would change to, then click onto the indicator link, and you'll see if you read table M correctly.  Try as many as you can take!

pH 1.0 pH 3.0 pH 5.0 pH 7.0 pH 9.0 pH 11.0 pH 12.9
methyl orange methyl orange methyl orange methyl orange methyl orange methyl orange methyl orange
bromthymol blue bromthymol blue bromthymol blue bromthymol blue bromthymol blue bromthymol blue bromthymol blue
phenolphthalein phenolphthalein phenolphthalein phenolphthalein phenolphthalein phenolphthalein phenolphthalein
litmus litmus litmus litmus litmus litmus litmus
bromcresol green bromcresol green bromcresol green bromcresol green bromcresol green bromcresol green bromcresol green
thymol blue thymol blue thymol blue thymol blue thymol blue thymol blue thymol blue

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Methyl Orange is red below pH 3.2, and above pH 4.4 it will be yellow.  "In The Zone", between 3.2 and 4.4 methyl orange is intermediate, a reddish yellow - or orange-like color. 

At pH 1.0 Methyl Orange is RED. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Methyl Orange is red below pH 3.2, and above pH 4.4 it will be yellow.  "In The Zone", between 3.2 and 4.4 methyl orange is intermediate, a reddish yellow - or orange-like color. 

At pH 3.0 Methyl Orange is RED. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Methyl Orange is red below pH 3.2, and above pH 4.4 it will be yellow.  "In The Zone", between 3.2 and 4.4 methyl orange is intermediate, a reddish yellow - or orange-like color. 

At pH 5.0 Methyl Orange is Yellow. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Methyl Orange is red below pH 3.2, and above pH 4.4 it will be yellow.  "In The Zone", between 3.2 and 4.4 methyl orange is intermediate, a reddish yellow - or orange-like color. 

At pH 7.0 Methyl Orange is Yellow. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Methyl Orange is red below pH 3.2, and above pH 4.4 it will be yellow.  "In The Zone", between 3.2 and 4.4 methyl orange is intermediate, a reddish yellow - or orange-like color. 

At pH 9.0 Methyl Orange is Yellow. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Methyl Orange is red below pH 3.2, and above pH 4.4 it will be yellow.  "In The Zone", between 3.2 and 4.4 methyl orange is intermediate, a reddish yellow - or orange-like color. 

At pH 11.0 Methyl Orange is Yellow. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Methyl Orange is red below pH 3.2, and above pH 4.4 it will be yellow.  "In The Zone", between 3.2 and 4.4 methyl orange is intermediate, a reddish yellow - or orange-like color. 

At pH 12.9 Methyl Orange is Yellow. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromthymol Blue is yellow below pH 6.0, and above pH 7.6 it will be blue.  "In The Zone", between 6.0 and 7.6 bromthymol blue is intermediate, a greenish color. 

At pH 1.0 Bromthymol Blue is Yellow. 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromthymol Blue is yellow below pH 6.0, and above pH 7.6 it will be blue.  "In The Zone", between 6.0 and 7.6 bromthymol blue is intermediate, a greenish color. 

At pH 3.0 Bromthymol Blue is Yellow. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromthymol Blue is yellow below pH 6.0, and above pH 7.6 it will be blue.  "In The Zone", between 6.0 and 7.6 bromthymol blue is intermediate, a greenish color. 

At pH 5.0 Bromthymol Blue is Yellow. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromthymol Blue is yellow below pH 6.0, and above pH 7.6 it will be blue.  "In The Zone", between 6.0 and 7.6 bromthymol blue is intermediate, a greenish color. 

At pH 7.0 Bromthymol Blue is Greenish. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromthymol Blue is yellow below pH 6.0, and above pH 7.6 it will be blue.  "In The Zone", between 6.0 and 7.6 bromthymol blue is intermediate, a greenish color. 

At pH 9.0 Bromthymol Blue is Blue. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromthymol Blue is yellow below pH 6.0, and above pH 7.6 it will be blue.  "In The Zone", between 6.0 and 7.6 bromthymol blue is intermediate, a greenish color. 

At pH 11.0 Bromthymol Blue is Blue. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromthymol Blue is yellow below pH 6.0, and above pH 7.6 it will be blue.  "In The Zone", between 6.0 and 7.6 bromthymol blue is intermediate, a greenish color. 

At pH 12.9 Bromthymol Blue is Blue. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Phenolphthalein is colorless below pH 8.2, and above pH 10 it will be pink.  "In The Zone", between 8.2 and 10 Phenolphthalein is intermediate, a pale pink color. 

At pH 1.0 Phenolphthalein is Colorless. 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Phenolphthalein is colorless below pH 8.2, and above pH 10 it will be pink.  "In The Zone", between 8.2 and 10 Phenolphthalein is intermediate, a pale pink color. 

At pH 3.0 Phenolphthalein is Colorless.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Phenolphthalein is colorless below pH 8.2, and above pH 10 it will be pink.  "In The Zone", between 8.2 and 10 Phenolphthalein is intermediate, a pale pink color. 

At pH 5.0 Phenolphthalein is Colorless.



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Phenolphthalein is colorless below pH 8.2, and above pH 10 it will be pink.  "In The Zone", between 8.2 and 10 Phenolphthalein is intermediate, a pale pink color. 

At pH 7.0 Phenolphthalein is Colorless.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Phenolphthalein is colorless below pH 8.2, and above pH 10 it will be pink.  "In The Zone", between 8.2 and 10 Phenolphthalein is intermediate, a pale pink color. 

At pH 9.0 Phenolphthalein is Pale Pink.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Phenolphthalein is colorless below pH 8.2, and above pH 10 it will be pink.  "In The Zone", between 8.2 and 10 Phenolphthalein is intermediate, a pale pink color. 

At pH 11.0 Phenolphthalein is Pink.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Phenolphthalein is colorless below pH 8.2, and above pH 10 it will be pink.  "In The Zone", between 8.2 and 10 Phenolphthalein is intermediate, a pale pink color. 

At pH 12.9 Phenolphthalein is Pink.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Litmus is red below pH 5.5, and above pH 8.2 it will be blue.  "In The Zone", between 5.5 and 8.2 Litmus is intermediate, a purplish color. 

At pH 1.0 Litmus is Red.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Litmus is red below pH 5.5, and above pH 8.2 it will be blue.  "In The Zone", between 5.5 and 8.2 Litmus is intermediate, a purplish color. 

At pH 3.0 Litmus is Red.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Litmus is red below pH 5.5, and above pH 8.2 it will be blue.  "In The Zone", between 5.5 and 8.2 Litmus is intermediate, a purplish color. 

At pH 5.0 Litmus is Red.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Litmus is red below pH 5.5, and above pH 8.2 it will be blue.  "In The Zone", between 5.5 and 8.2 Litmus is intermediate, a purplish color. 

At pH 7.0 Litmus is Purplish.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Litmus is red below pH 5.5, and above pH 8.2 it will be blue.  "In The Zone", between 5.5 and 8.2 Litmus is intermediate, a purplish color. 

At pH 9.0 Litmus is Blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Litmus is red below pH 5.5, and above pH 8.2 it will be blue.  "In The Zone", between 5.5 and 8.2 Litmus is intermediate, a purplish color. 

At pH 11.0 Litmus is Blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Litmus is red below pH 5.5, and above pH 8.2 it will be blue.  "In The Zone", between 5.5 and 8.2 Litmus is intermediate, a purplish color. 

At pH 12.9 Litmus is Blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromcresol Green is yellow below pH 3.8, and above pH 5.4 it will be blue.  "In The Zone", between 3.8 and 5.4 Bromcresol Green is intermediate, a greenish color. 

At pH 1.0 Bromcresol Green is yellow.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromcresol Green is yellow below pH 3.8, and above pH 5.4 it will be blue.  "In The Zone", between 3.8 and 5.4 Bromcresol Green is intermediate, a greenish color. 

At pH 3.0 Bromcresol Green is yellow.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromcresol Green is yellow below pH 3.8, and above pH 5.4 it will be blue.  "In The Zone", between 3.8 and 5.4 Bromcresol Green is intermediate, a greenish color. 

At pH 5.0 Bromcresol Green is greenish.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromcresol Green is yellow below pH 3.8, and above pH 5.4 it will be blue.  "In The Zone", between 3.8 and 5.4 Bromcresol Green is intermediate, a greenish color. 

At pH 7.0 Bromcresol Green is blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromcresol Green is yellow below pH 3.8, and above pH 5.4 it will be blue.  "In The Zone", between 3.8 and 5.4 Bromcresol Green is intermediate, a greenish color. 

At pH 9.0 Bromcresol Green is blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromcresol Green is yellow below pH 3.8, and above pH 5.4 it will be blue.  "In The Zone", between 3.8 and 5.4 Bromcresol Green is intermediate, a greenish color. 

At pH 11.0 Bromcresol Green is blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Bromcresol Green is yellow below pH 3.8, and above pH 5.4 it will be blue.  "In The Zone", between 3.8 and 5.4 Bromcresol Green is intermediate, a greenish color. 

At pH 12.9 Bromcresol Green is blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Thymol Blue is yellow below pH 8.0, and above pH 9.6 it will be blue.  "In The Zone", between 8.0 and 9.6 Thymol Blue is intermediate, a greenish color. 

At pH 1.0 Thymol blue is yellow.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Thymol Blue is yellow below pH 8.0, and above pH 9.6 it will be blue.  "In The Zone", between 8.0 and 9.6 Thymol Blue is intermediate, a greenish color. 

At pH 3.0 Thymol blue is yellow.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Thymol Blue is yellow below pH 8.0, and above pH 9.6 it will be blue.  "In The Zone", between 8.0 and 9.6 Thymol Blue is intermediate, a greenish color. 

At pH 5.0 Thymol blue is yellow.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Thymol Blue is yellow below pH 8.0, and above pH 9.6 it will be blue.  "In The Zone", between 8.0 and 9.6 Thymol Blue is intermediate, a greenish color. 

At pH 7.0 Thymol blue is yellow.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Thymol Blue is yellow below pH 8.0, and above pH 9.6 it will be blue.  "In The Zone", between 8.0 and 9.6 Thymol Blue is intermediate, a greenish color. 

At pH 9.0 Thymol blue is greenish.


 

 

 

 

 

 

 

 

 

 

 

 





 

 

 

 

 

 




According to Table M, indicator Thymol Blue is yellow below pH 8.0, and above pH 9.6 it will be blue.  "In The Zone", between 8.0 and 9.6 Thymol Blue is intermediate, a greenish color. 

At pH 11.0 Thymol blue is blue.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 




According to Table M, indicator Thymol Blue is yellow below pH 8.0, and above pH 9.6 it will be blue.  "In The Zone", between 8.0 and 9.6 Thymol Blue is intermediate, a greenish color. 

At pH 12.9 Thymol blue is blue.