1. When NaOH is added to a sample, a blue precipitate forms. What cation was present in the sample?

Question 1 of 10

2. How are calcium ions identified, and what is the result?

Question 2 of 10

3. In a flame test, a orange-red colour is seen. Give the formula of the cation which is present.

Question 3 of 10

4. When testing for halide ions, after silver nitrate is added to a sample a white precipitate is formed. Give the formula of the anion present in the sample.

Question 4 of 10

5. In a flame test, why is hydrochloric acid used?

Question 5 of 10

6. Give the name of the blue precipitate formed when sodium hydroxide is added to a solution containing Cu²⁺

Question 6 of 10

7. Give the name of the green precipitate formed when sodium hydroxide is added to a solution containing Fe²⁺

Question 7 of 10

8. When testing a sample for ions, hydrochloric acid and then barium chloride are added to a sample. A white precipitate forms. What is the name of that precipitate?

Question 8 of 10

9. Which two substances are added when testing for halide ions, and what is the result if they are present?

Question 9 of 10

10. In a flame test, a red colour is seen. Give the formula of the cation which is present.

Question 10 of 10