Litmus is an organic dye extracted from lichens. It is red
Chapter 19, Problem 19.137(choose chapter or problem)
Litmus is an organic dye extracted from lichens. It is red below pH 4.5 and blue above pH 8.3. One drop of either 0.1 M HCl (pH 1) or a pH 3 buffer changes blue litmus paper to red, but a drop of 0.001 M HCl (also pH 3) does not. Explain
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