Cn you help me to answer this queation?
Jonny is given a jar of gas without labels and is asked to indenity the gas . he adds a few drops og hydrogencarbonate indicator to the jar and the colour of the
indicator does not change . He concludes that the gas inside the gas jar is
Which gas can hydrogencarbonate indicator test for?What would the colour change of hydrogencarbonate indicator be if the gas is present?
- 7 年前最愛解答
1.hydrogencarbonate indicator is used for carbon dioxide.
If the carbon dioxide is present ,then the colour of hydrogencarbonate indicator
changes from red to yellow
by the way,the conclusion he concludes does not correct,because other gases
do not change the colour of hydrogencarbonate indicator such as nitrogen and neon.If you truly want to test the present of oxygen,you should put a glowing match to the gas jar .If the match relights ,then the oxygen is present .