QA

Question 1

reacts with NAOH to form
white PPT, soluble in excess giving a colourless solution

Answer 1

aluminium (AL3+)

Question 2

reacts with NAOH to form
white PPT, insoluble in excess

Answer 2

calcium (Ca2+)

Question 3

reacts with NAOH
ammonia produced on warming

Answer 3

ammonium (NH4+)

Question 4

reacts with NAOH to form
light blue PPT, insoluble in excess

Answer 4

copper(II) (Cu2+)

Question 5

reacts with NAOH to form
green PPT, insoluble in excess

Answer 5

iron(II) (Fe2+)

Question 6

reacts with NAOH to form
red-brown PPT, insoluble in excess

Answer 6

iron(III) (Fe3+)

Question 7

reacts with NAOH to form
white PPT, soluble in excess giving a colourless solution

Answer 7

zinc (Zn2+)

Question 8

acidify w dilute nitric acid, add aqueous silver nitrate, white PPT is formed

Answer 8

chloride (CL-)

Question 9

add dilute acid, effervescence, carbon dioxide produced

Answer 9

carbonate (CO32-)

Question 10

add aqueous NAOH, then aluminium foil, warm carefully, ammonia produced

Answer 10

nitrate (NO3-)

Question 11

acidify w dilute nitric acid, add aqueous barium nitrate, white PPT is formed

Answer 11

sulfate (SO42-)