EL7:1.2 Precipitation Tests

Question 1

What is the precipitate formed between a copper ion and sodium hydroxide?

Answer 1

Copper hydroxide.

Question 2

What is the precipitate formed between an iron 2+ ion and sodium hydroxide?

Answer 2

Iron (||) hydroxide.

Question 3

What is the precipitate formed between an iron 3+ ion and sodium hydroxide?

Answer 3

Iron (|||) hydroxide.

Question 4

What is the precipitate formed between a lead ion and potassium iodide?

Answer 4

Lead iodide.

Question 5

What is the precipitate formed between a chlorine ion and silver nitrate?

Answer 5

Silver chloride.

Question 6

What is the precipitate formed between a bromine ion and silver nitrate?

Answer 6

Silver bromide.

Question 7

What is the precipitate formed between a iodine ion and silver nitrate?

Answer 7

Silver iodide.

Question 8

What is the precipitate formed between a sulfate ion and barium chloride?

Answer 8

Barium sulfate.

Question 9

What is the colour of the precipitate copper hydroxide?

Answer 9

Blue.

Question 10

What is the colour of the precipitate iron (||) hydroxide?

Answer 10

Dirty green.

Question 11

What is the colour of the precipitate iron (|||) hydroxide?

Answer 11

Orange/brown.

Question 12

What is the colour of the precipitate lead iodide?

Answer 12

Bright yellow.

Question 13

What is the colour of the precipitate silver nitrate?

Answer 13

White.

Question 14

What is the colour of the precipitate silver bromide?

Answer 14

Cream.

Question 15

What is the colour of the precipitate silver iodide?

Answer 15

Pale yellow.

Question 16

What is the colour of the precipitate barium sulfate?

Answer 16

White.