Identification Of Ions By Chemical And Spectroscopic Means (chemistry Only) (GCSE Chemistry)

Why are samples often acidified before testing for halide ions with silver nitrate?

What result would you expect if an aqueous solution containing sulfate ions is treated with barium chloride without prior acidification?

Which observation would identify the presence of iron(II) ions when sodium hydroxide is added to a sample?

Which reagent and result identify sulfate ions in an aqueous sample after acidifying with hydrochloric acid?

What result would you expect when testing an unknown solution containing carbonate with dilute hydrochloric acid?

Which metal ion produces a lilac (violet) flame in a simple flame test?

When using flame emission spectroscopy, what property of the emitted light allows identification of elements in a sample?

What is the correct colour change when carbon dioxide is bubbled through limewater?

Which test and result identify ammonium ions in a salt?

A student acidifies a solution and adds silver nitrate: a cream precipitate forms which darkens on exposure to light. Which halide is present?

Which instrumental technique would give a spectrum with sharp emission lines that can be matched to known elements for identification of metal ions in solution?