This question is about identifying ions and performing calculations with solutions.
Which two methods can be used to identify the presence of potassium ions in a solution?
Sodium hydroxide solution is used to test for some metal ions. Sodium hydroxide solution is added to a solution of iron(III) chloride until a prefixipitate forms.
Complete the sentence by choosing from: blue, brown, green, or white.
The colour of the precipitate formed is _______________.
Complete the sentence by choosing from: barium chloride solution, limewater, red litmus paper, or silver nitrate solution.
Sulfate ions can be identified using dilute hydrochloric acid and _______________.
A solution of iron(III) chloride has a concentration of 245 g/dm3245 \text{ g/dm}^3245 g/dm3.
Calculate the mass of iron(III) chloride needed to make 350 cm3350 \text{ cm}^3350 cm3 of a solution with a concentration of 245 g/dm3245 \text{ g/dm}^3245 g/dm3.
Give your answer to 3 significant figures.
29 exam-style questions on AQA GCSE Chemistry 8.3 Identification of ions by chemical and spectroscopic means, covering 8.3.1 Flame tests, 8.3.2 Metal hydroxides, 8.3.3 Carbonates, 8.3.4 Halides, 8.3.5 Sulfates, 8.3.6 Instrumental methods, and 8.3.7 Flame emission spectroscopy. Each one has a worked solution and a mark scheme showing where the marks go.