Tests for ions

Question 1

what piece of equipment is used to test for metal ions?

Answer 1

a platinum wire loop

Question 2

lithium flame test

Answer 2

crimson-red

Question 3

sodium flame test

Answer 3

yellowy-orange

Question 4

potassium flame test

Answer 4

lilac

Question 5

calcium flame test

Answer 5

brick-red

Question 6

many metal hydroxides are…

Answer 6

insoluble

Question 7

what is added to test for metal ions?

Answer 7

sodium hydroxide

Question 8

colour of copper hydroxide precipitate

Answer 8

blue

Question 9

colour of iron(2) hydroxide precipitate

Answer 9

sludgy green

Question 10

colour of iron (3) hydroxide precipitate

Answer 10

reddish-brown

Question 11

what is added to test for ammonium ions?

Answer 11

sodium hydroxide

Question 12

what is added to test for carbonates?

Answer 12

dilute hydrochloric acid

Question 13

what is added to test for sulphates?

Answer 13

dilute hydrochloric acid

then barium chloride solution

Question 14

what is added to test for halides?

Answer 14

dilute nitric acid

silver nitrate solution

Question 15

what colour is the precipitate that shows that sulphates are present?

Answer 15

white

Question 16

silver chloride precipitate colour

Answer 16

white

Question 17

silver bromide precipitate colour

Answer 17

cream

Question 18

silver iodide precipitate colour

Answer 18

yellow