Identifying Chemicals in Solution +Misc

Question 1

When a base is added to an NH₄⁺ solution,

Answer 1

the distinctive odor of ammonia can be detected.

Question 2

When an acid is added to a solution containing S^2-,

Answer 2

the rotten egg odor of H₂S can be detected.

Question 3

When acidis added to a solution containing CO₃^2-,

Answer 3

CO₂ gas is produced.

Question 4

Many of the transition metals form ions with distinctive colors, for example,

Answer 4

Cu²⁺ (blue), and Ni²⁺ (Green)

Question 5

Bromine and Iodine will show a dark brown color

Question 6

Permanganate ion (MnO₄^-), a strong oxidizing agent,

Answer 6

turns a solution purple.

Question 7

Dichromate (Cr₂O₇^2-), also a strong oxidizing agent, turns a solution

Answer 7

orange. Chromate (CrO₄^2-) turns a solution yellow.