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Due to a color change from blue to red at pH 3.0–5.2, Congo red can be used as a pH indicator.Since this color change is an approximate inverse of that of litmus, it can be used with litmus paper in a simple parlor trick: add a drop or two of Congo red to both an acid solution and a base solution.
Congo red: blue-violet 3.0 5.0 red Methyl orange: red 3.1 4.4 yellow ... red blue Litmus: red blue Turmeric: yellow reddish brown Hydrangea in acid soil.
Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity. In an acidic medium, blue litmus paper turns red, while in a basic or alkaline medium, red litmus paper turns blue. In short, it is a dye and ...
The results of a new study involving 826 young adults suggest that diets high in fast food, processed red meat, and soda but low in fruits and vegetables may be linked to faster biological aging.
Red Lobster's "Lobsterfest" event is back just in time for February 14. The seafood chain is offering new entrées like a Lobster Roll and Lobster and Shrimp Linguini, along with other tasty options.
Orange/red 3.1 - 4.4 Yellow Methyl Red Red 4.4 - 6.3 Yellow Congo Red Blue 3.0 - 5.2 Red Phenolphthalein Colourless 8.3 - 10.0 Pink Thymolphthalein
The 4 Nations Face-Off begins in four days, and Canada and the USA are dealing with a few injuries.. Pittsburgh Penguins star Sidney Crosby missed Friday's game with an upper-body injury, ending ...
Methyl orange shows red color in acidic medium and yellow color in basic medium. Because it changes color at the p K a of a mid strength acid, it is usually used in titration of strong acids in weak bases that reach the equivalence point at a pH of 3.1-4.4. [ 3 ]