Question

mixed indicators example​

Answer 1

Answer:

The advantage of complementary colors is exploited with a mixed indicator solution. For example, the indicator methyl purple is a mixed indicator made from methyl red (red → yellow pH; 4.2 → 6.2) and a blue dye. When mixed, the color change is from purple to green above pH 5.4.

Answer 2

For example: A mixture of 3parts of phenolphthalein and 1 part of naphtholphthalein shows a change in color from pale rose to violet at pH = 8.9. The mixed indicator is useful for the titration of phosphoric acid to diproti stage.