Tests Flashcards
What is the ion of lithium and how does it burn
Li+ and with a red flame
What is the ion of sodium and how does it burn
Na+ and with a yellow flame
What is the ion of potassium and how does it burn
K+ and with a lilac flame
What is the ion of calcium and how does it burn
Ca2+ and with an orange-red flame
What is the ion of copper and how does it burn
Cu2+ and with a blue-green flame
What is the colour of the precipitate when copper reacts with a metal hydroxide
Blue
What is the colour of iron when it reacts with a metal hydroxide
Green
What is the colour of iron (III) when it reacts with a metal hydroxide
Reddish brown
How can you test for the presents of ammonia gas
It will turn damp red litmus paper blue
It is harmful to your eyes and gives ff a strong smell
How can you test for the presence of carbonates
Add HCL to your substance and carbon dioxide will be produced
How can you test for the presence of sulphates
Add HCL as well as barium chloride solution to your substance and a white precipitate of of barium sulphate will be produced
How can you test for the presence of halids
Add dilute nitric acid, followed by silver nitrate solution
What colour is the precipitate of silver chloride
White
What colour is the silver precipitate of silver bromide
Cream
What colour is the precipitate of silver iodide
Yellow
How can you test for chlorine gas
Bleaches damp blue litmus paper white/red
How can you test for oxygen gas
It will relight a glowing splint
How can you test for carbon dioxide gas
It will turn limewater cloudy
How can you test for hydrogen gas
It will make a squeaky pop with a lighted splint
How can you test for ammonia gas
Turns damp red litmus paper blue
How can you used copper (II) sulphate crystals to test for water
Heat the blue hydrated copper (II) sulphate crystals to drive the water off
This leaves a white anhydrous copper (II) sulphate powder
If you add a few drops of water to the powder, the crystals will return again
How can you test for pure water
Pure water will boil at 100 degrees Celsius
Pure water will freeze at 0 degrees Celsius
What is the formula for sulphuric acid
H2SO4
What is the formula for hydrochloric acid
HCL
