Chemical Tests Flashcards
How to test for hydrogen?
Hydrogen makes a squeaky pop with a lit splint
How to test for oxygen?
Oxygen will relight a glowing splint
How to test for carbon dioxide?
Carbon dioxide will turn limewater cloudy
How to test for ammonia?
Ammonia will turn damp litmus paper red to blue
How to test for chlorine?
Chlorine will bleach damp blue litmus paper turning it white
How to test for water?
When copper(II) sulfate crystals are bound to water they turn blue
How to test if a sample is pure?
Use the defined physical properties like boiling point and freezing point.
How do you carry out a flame test?
1) Clean a platinum wire loop by dipping it in some dilute HCL
2) Hold the loop in the flame and if it burns without any color you can dip it into the sample you want to test
What color will lithium be under a flame?
Red
What color will sodium be under a flame?
Yellow
What color will potassium be under a flame?
Lilac
What color will calcium be under a flame?
Orange - red
What color will copper be under a flame?
Blue - green
What color will the precipitate of copper be when in sodium hydroxide?
Blue
What color will the precipitate of iron(II) be when in sodium hydroxide?
Sludgy green