What colour is? Transition Metals

Question 1

Which precipitate can redissolve on addition of excess ammonia?

Accepted Answer

Chromium(III) hydroxide, Copper(II) hydroxide

Question 2

When excess ammonia is added to aqueous Copper(II), what colour solution forms?

Accepted Answer

dark blue

Question 3

When excess ammonia is added to aqueous chromium(III), what colour solution forms?

Accepted Answer

violet/purple

Question 4

What colour is aqueous manganese(II)?

Accepted Answer

pink

Question 5

What colour is aqueous chromium(III)?

Accepted Answer

green, purple/violet

Question 6

Which hydroxide precipitate can redissolve on addition of excess OH- ions?

Accepted Answer

Chromium(III) hydroxide

Question 7

What is the colour of the complex ion of chromium(III) and hydroxide ions?

Accepted Answer

green

Question 8

What colour is aqueous copper(II)?

Accepted Answer

blue

Question 9

What colour is Fe(OH)3 precipitate?

Accepted Answer

red/brown

Question 10

What colour is aqueous iron(II)?

Accepted Answer

green

Question 11

What colour is aqueous iron(III)?

Accepted Answer

yellow

Question 12

What colour is Fe(OH)2 precipitate?

Accepted Answer

green turning red/brown

Question 13

When excess hydroxide is added to aqueous chromium(III), what colour solution forms?

Accepted Answer

green

Question 14

What colour is Mn(OH)2 precipitate?

Accepted Answer

light brown turning dark brown

Question 15

What colour is Cu(OH)2 precipitate?

Accepted Answer

blue

Question 16

What is the colour of the complex ion of copper(II) and chloride ions?

Accepted Answer

green, yellow

Question 17

What is the colour of the complex ion of chromium(III) and ammonia?

Accepted Answer

violet/purple

Question 18

What is the colour of the complex ion of copper(II) and ammonia?

Accepted Answer

dark blue

Question 19

What colour is Cr(OH)3 precipitate?

Accepted Answer

green

Questions 19