Chemistry Unit Three - Chemical Analysis This cross word allows you to revise the results of forming precipitates, flame tests and testing for negative ions in a fun way. 0.0 / 5HideShow resource informationChemistryAnalysing substancesTesting and analysing substancesGCSEAQACreated by: Rachael_StevensCreated on: 07-02-15 10:59 8231497106 Across 1. What colour does a flame go if potassium is added during a flame test? (5) 2. What colour does a flame go if sodium is added during a flame test? (6) 6. Once the acid had been added when testing for sulphate ions (negative ions) what must be added next? (6, 8) 7. What colour precipitate does iron (II) form what sodium hydroxide is added? (5) 9. When testing for carbonates (negative ions) what dilute solution do you add? (4) Down 2. When testing for halide ions (negative ions) if silver iodide is present what colour precipitate will form? (6) 3. Which positive ion's precipitate is soluble in excess sodium hydroxide? (9) 4. When testing for halide ions (negative ions) if silver bromide is present what colour precipitate will form? (5) 8. What colour does a flame go if lithium is added during a flame test? (7) 10. You use a flame test to determine which precipitate is magnesium and which is calcium. What colour would the flame turn if it was calcium? (3)
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