Y12 Test Tube Tests - Inorganic

Question 1

What does sodium carbonate test for?

Answer 1

Acids

Question 2

What is observed when sodium carbonate is added to an acid?

Answer 2

Effervescence (CO2 gas is released)

Question 3

What reagent is used to test for ammounium ions?

Answer 3

Heat with NaOH

Question 4

What is observed when ammounium (NH4+) ions are heated with NaOH

Answer 4

Gas released turns damp red litmus paper blue

Question 5

What gas is released when ammonium ions are warmed with NaOH

Answer 5

ammonia gas (NH3)

Question 6

What is the test for sulfate ions (SO4 2-)

Answer 6

Acidified Barium Chloride

Question 7

What is observed when sulfuric acid is added to BaCl2?

Answer 7

White precipitate (BaSO4)

Question 8

What is the ionic equation for the reaction of Na2SO4 with BaCl2

Answer 8

Ba2+ (aq) + SO4 2- (aq) –> BaSO4 (s)

Question 9

How do you test for magnesium ions?

Answer 9

Add NaOH. This forms Mg(OH)2 which is a white precipitate

Question 10

How do you test for hydroxide ions?

Answer 10

Add Mg(NO3)2. This forms Mg(OH)2 which is a white precipitate

Question 11

What would you expect to see when sodium carbonate is added to HCl?

Answer 11

Effervescence

Question 12

What would you expect to see when barium carbonate (BaCO3) is added to sulfuric acid (H2SO4)

Answer 12

Effervescence and a white precipitate