What are the colors of hydrogen carbonate indicator?

Answer 1

The hydrogen carbonate indicator is used to test for carbon dioxide. If it stays in the normal air, it remains red. If there is more than 0.03 percent of carbon dioxide in the air, it would turn yellow. It there is less than 0.03 percent of carbon dioxide it would turn purple.

Answer 2

Carbon dioxide produced in respiration will cause hydrogencarbonate indicator to turn from a reddish colour to an orange/yellow.

It is actually not a specific test for carbon dioxide, relying on small pH changes due to carbonic acid, formed when carbon dioxide reacts with water

Answer 3

When carbon dioxide is bubbled through water, some of that carbon dioxide dissolves into the water. It then can react with the water to form carbonic acid. The formula for carbonic acid is H2CO3 (aq). Therefore, when carbon dioxide is bubbled through water, the solution becomes more acidic.

If a solution becomes more acidic and contains a pH indicator, the indicator changes colour to show the pH of the solution. With Universal Indicator, this change is from green, through yellow to orange. It does not go red as carbonic acid is quite weak.

Answer 4

When the hydrogen carbonate indicator is used for testing carbon dioxide. If it stays in the normal air, it remains red. If there is more than 0.03 percent of carbon dioxide in the air, it would turn yellow. It there is less than 0.03 percent of carbon dioxide it would turn purple.

Answer 5

if a solution has a normal concentration of carbondioxide then the hydrogencarbonate indicator is going to turn red but if the solutin gets acidic i.e concentration of carbondioxide increases then the indicator will turn yellow..

Answer 6

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Answer 7

Hydrogen carbonate indicator can change color from orange (in basic solutions) to yellow (in neutral solutions) to pink (in acidic solutions).

Answer 8

If the concentration of carbon dioxide in the indicator decreased, then the indicator would turn purple.

Answer 9

When there is a decreasing level of CO2 in the solution.

Answer 10

Adding dry ice to water a solution of carbonic acid is formed, the pH decrease and the color of indicator is changed.