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level: Chemical indicators

Questions and Answers List

Question	Answer
Alizarin yellow 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Yellow 2. 10.1 - 13.0 3. 12.5 4. Orange /red
Methyl voilet 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Yellow 2. 0.0 - 1.6 3. 0.8 4. Blue
Methyl yellow 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Red 2. 2.9 - 4.0 3. 3.5 4. yellow
Methyl orange 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Red 2. 3.2 -4.4 3. 3.7 4. Yellow
Bromophenol blue 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. yellow 2. 2.8 - 4.6 3. 4.0 4. Blue
Bromocresol green 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Yellow 2. 3.8 - 5.4 3. 4.7 4. Blue
Methyl red 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Red 2. 4.2 - 6.3 3. 5.1 4. Yellow
Bromothymol 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Yellow 2. 6.0 - 7.6 3. 7.0 4. Blue
Phenolphthalein 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Colourless 2. 8.2 - 10.0 3. 9.3 4. pink / violet
Alizarin yellow 1. Colour at lower pH 2. pH range 3. End-point 4. Colour at higher pH	1. Yellow 2. 10.1 - 13.0 3. 12.5 4. Orange /red