SECTION THREE 



N/iooNaOH 5-92011. 



Distilled water 74-08 ml. 



Absolute alcohol . . . . . . . . 20 ml. 



BROMOTHYMOL BLUE 



pH 6 -0-7 -6 



Bromothymol blue . . . . - . . . . 0-04 gm. 



N/iooNaOH 6-4 ml. 



Distilled water 73-6 ml. 



Absolute alcohol . . . . . . . . 20 ml. 



CHLOROPHENOL RED 



pH 5 •0-6-6 



Chlorophenol red .. .. .. .. 0-04 gm. 



N/iooNaOH 9-44 ml. 



20% Alcohol 90-56 ml. 



CONGO RED 



pH 3-0-5-2 



Congo red . . . . . . . . . . o-i gm. 



Distilled water . . . . . . . . 80 ml. 



Absolute alcohol . . . . . . . . 20 ml. 



o-CRESOLPHTHALEIN 



pH 8-2-10-4 



o-Cresolphthalein .. .. .. .. 0-04 gm. 



Alcohol 50% 100 ml. 



m-CRESOL PURPLE 



pH 0-5-2-5 and 7-0-9-0 



m-Cresol purple . . . . . . . . 0-04 gm. 



N/iooNaOH io-88 ml. 



Distilled water 69-12 ml. 



Absolute alcohol . . . . . . . . 20 ml. 



CRESOL RED 



pH 7-2-8-8 



Cresol red . . . . . . . . . . 0-04 gm. 



^* 541 



