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

Which observation indicates the presence of carbonate impurities when testing for sulfate with barium chloride?

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

In flame tests, why is a platinum or nichrome wire cleaned in hydrochloric acid and then placed in a blue Bunsen flame before testing?

Which statement best describes a qualitative identification using a sodium flame test followed by a flame photometer reading?

Why is it necessary to acidify a sample with dilute nitric acid before adding silver nitrate to test for halide ions?

Which cation gives a brick-red colour in a flame test and can be confirmed by its specific emission lines?

Which precipitate and test result indicate the presence of calcium ions when sodium hydroxide is added to an aqueous sample?

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

Which test is most appropriate to confirm chloride rather than bromide in a sample after obtaining a white precipitate with silver nitrate?

A student adds dilute hydrochloric acid to a solid sample and observes effervescence and a gas that turns limewater milky. Which ion is present in the solid?

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