Methyl Red Mixed Solution
Dissolve 0.1 g of methyl red and 50 mg of methylene blue in 100 mL of ethanol (96%).
Colour change pH 5.2 (red-violet) to pH 5.6 (green).
Dissolve 0.1 g of methyl red and 50 mg of methylene blue in 100 mL of ethanol (96%).
Colour change pH 5.2 (red-violet) to pH 5.6 (green).