QA test

Question 1

Test for anions hint

Answer 1

CCINS (sins)

Question 2

Test for carbonate anions

Answer 2

Add dilute acid
If carbonate ions are present: Effervescence and carbon dioxide is produced

Question 3

Test for chloride anions

Answer 3

Add dilute acid and silver nitrate
If chloride ions are present: White ppt forms

Question 4

Test for iodide anions

Answer 4

Add dilute acid and silver nitrate
If iodide ions are present: Yellow ppt forms

Question 5

Test for nitrate anions

Answer 5

Add sodium hydroxide and aluminum foil
If nitrate ions are present: Ammonia gas is produced

Question 6

Test for sulfate anions

Answer 6

Add dilute acid and barium nitrate
If sulfate ions are present: White ppt forms

Question 7

Test for cations hint

Answer 7

AACCIILZ

Question 8

Test for aluminum cations

Answer 8

1. Add sodium hydroxide
   If aluminum ions are present: White ppt is formed and it is soluble in excess forming a colourless solution
2. Add aqueous ammonia
   If aluminum ions are present: White ppt is formed and it is insoluble in excess
3. Add aqueous potasisum iodide
   If aluminum ions are present: No yellow ppt forms

Question 9

Test for ammonium cations

Answer 9

1. Add sodium hydroxide and warm
   If ammonium ions are present: Ammonia gas is produced

Question 10

Test for calcium cations

Answer 10

1. Add sodium hydroxide
   If calcium ions are present: White ppt is produced and it is insoluble in excess
2. Add aqueous ammonia
   If calcium ions are present: No ppt forms

Question 11

Test for copper (II) cations

Answer 11

1. Add sodium hydroxide
   If copper(II) ions are present: Light blue ppt forms and it is insoluble in excess
2. Add aqueous ammonia
   If copper (II) ions are present: Light blue ppt forms and it is soluble in excess forming a dark blue solution

Question 12

Test for iron (II) cations

Answer 12

1. Add sodium hydroxide
   If iron (II) ions are present: Green ppt forms and it is insoluble in excess
2. Add aqueous ammonia
   If iron (II) ions are present: Green ppt forms and it is insoluble in excess

Question 13

Test for iron (III) cations

Answer 13

1. Add sodium hydroxide
   If iron (III) ions are present: Red-brown ppt forms and it is insoluble in excess
2. Add aqueous ammonia
   If iron (III) ions are present: Red-brown ppt forms and it is insoluble in excess

Question 14

Test for lead (II) cations

Answer 14

1. Add sodium hydroxide
   If lead (II) ions are present: White ppt forms and it is soluble in excess forming a colourless solution
2. Add aqueous ammonia
   If lead (II) ions are present: White ppt forms and it is insoluble in excess
3. Add aqueous potassium iodide
   If lead (II) ions are present: Yellow ppt forms

Question 15

Test for zinc cations

Answer 15

1. Add sodium hydroxide
   If zinc ions are present: White ppt forms and it is soluble in excess forming a colourless solution
2. Add aqueous ammonia
   If zinc ions are present: White ppt forms and it is soluble in excess forming a colourless solution