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Did the color of the pH indicator change when you exhaled into test tube?
Wiki User
∙ 11y ago
It should have because you are exhaling CO2 gas which then reacts with the water to become H2CO3 or carbonic acid.
Wiki User
∙ 7y ago
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What is the indicator and color change for a positive test for glucose?
Benedict solution is the chemical indicator for simple sugars.
Why does the typical base indicator exhibit its color change over a range of about 2 PH units?
The usual range of the color change on the indicator is between 1.5-2 pH units because of the sensitivity of the indicators. The universal indicator is used in most test.
Which indicator would most likely yield a positive test by way of a color change in the water-cookie solution?
Benedicts solution
What color does the indicator paper turn if the substance is a strong acid?
If you are testing with Universal Indicator or the Litmus Test it will turn red.
What is phenolphthalein?
it is a agar medium for Microbiology containing phenolphthalein biphosphate. It is used in Petri plates and detects the phosphatase character of microbial colonies but requires final addition of alkali to color the phenolphatlein and the color rapidly fades.
What is the indicator and color change for a positive test for glucose?
Benedict solution is the chemical indicator for simple sugars.
Why does the typical base indicator exhibit its color change over a range of about 2 PH units?
The usual range of the color change on the indicator is between 1.5-2 pH units because of the sensitivity of the indicators. The universal indicator is used in most test.
What color does red cabbage indicator change to in alkali?
either a green, dark green or blue colour for i have done the test myself
Which indicator would most likely yield a positive test by way of a color change in the water-cookie solution?
Benedicts solution
What does universal indicator test for?
A universal indicator changes color in response to the pH of a liquid. Do determine the pH of the liquid, you need to refer to a color chart that tells you which color indicates which pH.
What color does the indicator paper turn if the substance is a strong acid?
If you are testing with Universal Indicator or the Litmus Test it will turn red.
When you put an alkali and Universal Indicator in a test tube what colour does it go?
When an alkali is added to a test tube containing Universal Indicator, it typically turns the indicator solution a dark green or blue color. This is because Universal Indicator is a mixture of different pH indicators that show a range of colors from red (acidic) to green (neutral) to blue or purple (alkaline). The specific color change observed may vary depending on the concentration and type of alkali used.
What would an organism use for energy in test tube during fermentation and what color would the indicator be.?
Sugar is the energy source, the definition of fermentation is: The anaerobic conversion of sugar to carbon dioxide and alcohol by yeast. As to the color of the indicator it would depend on what you were using to test and what you were testing for (sugar, Co2, alcohol).
What is a chemical indictor?
There is no such thing as a chemical "indictor". However a chemical "indicator" is:- It is a test that is used to determine the Ph of a substance, which leads to finding out if its an acid or base. There are many different kinds of indicators such as litmus paper and universal indicator, that when reacted with a substance change color to show you if it's an acid or base.
What is phenolphthalein?
it is a agar medium for Microbiology containing phenolphthalein biphosphate. It is used in Petri plates and detects the phosphatase character of microbial colonies but requires final addition of alkali to color the phenolphatlein and the color rapidly fades.
What is the chemical indicator used to test protein?
To test for protein. Biuret or solutions of sodium hydroxide and copper sulfate. Tested with a dropper a + result will be purple or something
What type of indicator should be used to determine the pH of an opaque substance?
Indicators would work to determine the pH of colored substances. The color change may be difficult to read depending on the indicator used. Another alternative to adding a indicator to the substance would be to use a test strip.
