What is the flame test colour of calcium?

(a)  

What colour is the precipitate formed when sodium hydroxide is added to iron 2+ ions?

(a)  

What colour is the precipitate formed when sodium hydroxide is added to iron 3+ ions?

(a)  

What colour was the litmus paper used to test for the presence of ammonia?

(a)  

What must you do to the platinum wire loop before dipping it in the test substance and then observing the colour in a blue flame?

(a)  

What colour is the precipitate produced when silver nitrate solution is added to iodide ions?

(a)  

What do you observe when acid is added to carbonate ions?

(a)  

What is the name of the white precipitate formed in a positive test for sulphate ions?

(a)  

Acid (usually nitric acid) is added before testing for sulphate or halide ions to remove any (a)   impurities.

What machine can be used to identify which metal ion is present using flame colours?

(a)  

A ....................... .............. must be used to work out the concentration of a metal ion in a sample solution

(a)  

Different metal ions produce different ..................... ................. which can be matched to the spectra of known ions.

(a)