Given 4 different solutions, how can we identify the solutions?
4 solutions : Water, Sodium Hydroxide, Hydrochloric acid, Hydrogen Peroxide(decomposes under light)
First , use the universal indicator to identify the solutions.
- Red -> hydrochloric acid
- Indigo -> Sodium Hydroxide
- Green -> Water and Hydrogen Peroxide
Red - Yellow : Acids
Blue - Violet : Alkali
Since there are two solutions that are neutral ( green in Universal Indicator) , we have to conduct another test to further identify them into which is water and which is hydrogen peroxide.
Water and Hydrogen Peroxide ---------------> Test for oxygen with a glowing splint
Hydrogen Peroxide -----> oxygen + water
Relights glowing splint ------> Hydrogen Peroxide
No relights of glowing splint ---------> Water