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What color is phenol red dropped into distilled water?
red
What color is phenol red at neutral pH?
it becomes an orange-red color
What is the liquid inside which the cell's activities take place?
phenol red
What is the chemical formula for phenol red?
A benzene ring with one -OH.
What is the best solvent for phenol for use in Gas Chromatography?
water
When do you use methyl red instead of phenol red?
You use methyl red as a ph indicator for for the MRVP test.
Does phenol red change baking soda to red?
Phenol red is a pH indicator. The baking soda is not changing color, but the phenol red is.
Is phenol red is a strong base and acids?
Phenol red is a weak acid.
What state of matter is phenol red solution?
A solution of phenol red is a liquid.
Is phenol red toxic?
no
What color is phenol red at a neutral?
Phenol red is made by condensation of Phenol and saccharine.pH below 6.8 = YellowpH above 8.2 = Red/FuschiaGradually turns from yellow to red/fuschia (pH between 6.8 and 8.2 = Pinkish)
HOW IS IT POSSIBLE FOR AN ORGANISM TO BE POSITIVE FOR GLUCOSE USE IN A PHENOL RED TEST BUT NEGATIVE IN THE METHYL RED TEST?
Methyl red differs from Phenolred (which is used in the fermentation test and the MSA plates) in that it is yellow at pH 6.2 and above and red at pH 4.4 and below. Phenol red turns yellow below a pH of 6.8. If you get a positive with methyl red and a negative with phenol red, the pH has to be between 6.7 and 6.1.
Explain the purpose of the phenol red in the medium?
To determine if a bacterium can ferment a particular carbohydrate and determine the end products of that fermentation
What color is phenol red dropped into distilled water?
red
What reaction do you get when you mix phenol red with acids and bases?
Phenol red is yellow under pH=6,8 and pink over a pH=8,2.
How do you make a solution of phenol red?
Boil red cabbage in water to make phenol red. This works well depending on how long you boil it will determine the strength of the solution.
Purpose of the phenol red in the medium?
Phenol red acts as the pH indicator. Turning yellow as the ph lowers (acidic environments) and deep red when the ph is high (alkaline environment)
