5.62 - Precipitation reactions

Question 1

What is the main use of precipitation reactions?

Answer 1

In chemical tests

Question 2

What is the key thing about precipitation reactions?

Answer 2

They produce a solid

Question 3

What is the chemical test for carbon dioxide?

Answer 3

• Bubble the gas through limewater

- If the gas is carbon dioxide, then a white precipitate will form

Question 4

What is the chemical test for sulfates?

Answer 4

• Add barium chloride to the solution

- If sulfate ions are present, barium sulfate, a white precipitate, will form

Question 5

What is the chemical test for halides?

Answer 5

• Add silver nitrate

- If a halide is present, a precipitate will form