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Sam Yr12 B2 24/25 > Y12 Test Tube Tests - No alcohols > Flashcards

Y12 Test Tube Tests - No alcohols Flashcards

1
Q

What does sodium carbonate test for?

A

Acids

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2
Q

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

A

Effervescence (CO2 gas is released)

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3
Q

What reagent is used to test for ammounium ions?

A

Heat with NaOH

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4
Q

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

A

Gas released turns damp red litmus paper blue

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5
Q

What gas is released when ammonium ions are warmed with NaOH

A

ammonia gas (NH3)

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6
Q

What is the simplest ionic equation for the reaction when ammonium nitrate (NH4NO3) is heated with sodium hydroxide (NaOH)?

A

NH4+ + OH- –> NH3 + H2O

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7
Q

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

A

Acidified Barium Chloride

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8
Q

What is observed when sulfuric acid is added to BaCl2?

A

White precipitate (BaSO4)

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9
Q

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

A

Ba2+ (aq) + SO4 2- (aq) –> BaSO4 (s)

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10
Q

How do you test for magnesium ions?

A

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

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11
Q

How do you test for hydroxide ions?

A

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

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12
Q

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

A

Effervescence

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13
Q

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

A

Effervescence and a white precipitate

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14
Q

What is the ionic equation for the reaction between ammonium bromide (NH4Br) and sodium hydroxide (NaOH)?

A

NH4+ + OH- –> NH3 + H2O

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15
Q

What is observed when this reaction occurs?

Ag+(aq) + F-(aq) –> AgF(aq)

A

Colourless solution

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16
Q

What is observed when this reaction occurs?

Ag+(aq) + Cl-(aq) –> AgCl(aq)

A

White precipitate

17
Q

What is observed when this reaction occurs?

Ag+(aq) + Br-(aq) –> AgBr(aq)

A

Cream precipitate

18
Q

What is observed when this reaction occurs?

Ag+(aq) + I-(aq) –> AgI(aq)

A

Yellow precipitate

19
Q

What is the test for halide ions?

A

Acidified silver nitrate (AgNO3)

20
Q

What is observed when dilute ammonia (NH3) is added to AgCl

A

White precipitate dissolves

21
Q

What is observed when dilute ammonia (NH3) is added to AgBr

A

Cream precipitate remains

22
Q

What is observed when concentrated ammonia (NH3) is added to AgI

A

Yellow precipitate remains

23
Q

What is the equation for the reaction between AgCl and dilute NH3(aq)?

A

AgCl + 2 NH3 –> Ag(NH3)2+ + Cl-

24
Q

What is the equation for the reaction between AgBr and concentrated NH3(aq)?

A

AgBr + 2 NH3 –> Ag(NH3)2+ + Br-

25
Q

What is the simplest ionic equation for the reaction between sodium carbonate (Na2CO3) and any acid?

A

CO32- + 2 H+ –> CO2 + H2O

Sam Yr12 B2 24/25 (11 decks)

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