posted by Sarah on .
If the pH of a solution is 3.5, what colour will be shown by each of the following indicators in the solution?
b) methyl red
c) Methyl orange
a) Yellow to Blue
b) Red to Yellow
c) Red to Yellow
d) close to a light pink almost colourless.
I don't believe you have interpreted the question correctly. For example,
for methyl red at pH 3.5. I look in my text and I see MR changes in the range of 4.2 to 6.3 (R-Y); below pH 4.2 it will be red and above 6.3 it will be yellow. Therefore, I would answer that at pH = 3.5 MR would be red.