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OLD Y13 Chem > Group 7 > Flashcards

Group 7 Flashcards

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1
Q

Name the type of reaction

NaCl(s) + H2SO4(aq) –> NaHSO4(s) + HCl(g)

A

Acid Base

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2
Q

Give the products of the equation

NaCl(s) + H2SO4(aq) –>

A

NaHSO4(s) + HCl(g)

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3
Q

Name the type of reaction

NaF(s) + H2SO4(aq) –> NaHSO4(s) + HF(g)

A

Acid Base

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4
Q

State the observation for this reaction

NaCl(s) + H2SO4(aq) –> NaHSO4(s) + HCl(g)

A

Steamy Fumes

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5
Q

State the observation for this reaction

NaF(s) + H2SO4(aq) –> NaHSO4(s) + HF(g)

A

Steamy Fumes

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6
Q

Give the products of the equation

NaF(s) + H2SO4(aq) –>

A

NaHSO4(s) + HF(g)

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7
Q

Give the half equation for the oxidation of bromide ions

A

2Br- –> Br2 + 2e-

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8
Q

What is the sulfur product formed when bromide ions reactant with sulfuric acid in a redox reaction

A

SO2

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9
Q

What is the observed when bromide ions reactant with sulfuric acid in a redox reaction

A

Acidic gas (SO2)
Brown fumes (Br2)

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10
Q

State the three different sulfur products that can be formed when iodide ions react with sulfuric acid in a redox reaction.

A

Sulfur dioxide (SO2)
Sulfur (S)
Hydrogen sulfide (H2S)

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11
Q

What is the observation when iodine is formed in a reaction with sulfuric acid?

A

Black solid

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12
Q

What is the observation when H2S is formed in a reaction with sulfuric acid?

A

Bad egg smell

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13
Q

What is the observation when sulphur is formed in a reaction using sulfuric acid?

A

Yellow solid

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14
Q

What is the observation when SO2 is formed in a reaction using sulfuric acid?

A

Acidic gas

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15
Q

A yellow solid and a black solid are formed when which two reactants react?

A

Iodide ions (I-) and sulfuric acid (H2SO4)

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16
Q

What is observed when this reaction occurs?

Ag+(aq) + F-(aq) –> AgF(aq)

A

Colourless solution

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17
Q

What is observed when this reaction occurs?

Ag+(aq) + Cl-(aq) –> AgCl(aq)

A

White precipitate

18
Q

What is observed when this reaction occurs?

Ag+(aq) + Br-(aq) –> AgBr(aq)

A

Cream precipitate

19
Q

What is observed when this reaction occurs?

Ag+(aq) + I-(aq) –> AgI(aq)

A

Yellow precipitate

20
Q

What is the test for halide ions?

A

Acidified silver nitrate (AgNO3)

21
Q

Why must a halide solution be acidified before testing with silver nitrate?

A

To remove carbonate ions

22
Q

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

A

White precipitate dissolves

23
Q

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

A

Cream precipitate remains

24
Q

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

A

Cream precipitate dissolves

25
Q

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

A

Yellow precipitate remains

26
Q

Why is chlorine added to drinking water?

A

To kill bacteria

27
Q

Give the products of the equation

Cl2(g) + H2O(l) –>

A

HClO(aq) + HCl(aq)

28
Q

Give the products of the equation

Cl2(g) + 2NaOH(aq) –>

A

NaClO(aq) + NaCl(aq) + H2O(l)

29
Q

Chlorine is toxic. Why is it not dangerous to add it to drinking water?

A

It is added in very low concentrations

30
Q

What is produced when chlorine is added to water?

A

HClO and HCl

31
Q

What is produced when chlorine is added to sodium hydroxide (NaOH)?

A

NaClO and NaCl and Water

32
Q

State the observation for the reaction

Cl2(aq) + 2NaBr(aq) –> Br2(aq) + 2NaCl(aq)

A

Orange/Brown solution (Br2 is formed)

33
Q

State the observation for the reaction

Cl2(aq) + 2NaI(aq) –> I2(aq) + 2NaCl(aq)

A

Brown solution (I2 is formed)

34
Q

State the observation for the reaction

I2(aq) + 2NaCl(aq) –>

A

No reaction (brown solution remains)

35
Q

Give the products of the reaction

Cl2(aq) + 2NaBr(aq) –>

A

Br2(aq) + 2NaCl(aq)

36
Q

Give the products of the reaction

Cl2(aq) + 2NaI(aq) –>

A

I2(aq) + 2NaCl(aq)

37
Q

Give the products of the reaction

Br2(aq) + 2NaI(aq) –>

A

I2(aq) + 2NaBr(aq)

38
Q

Give the products of the reaction

Br2(aq) + 2NaCl(aq) –>

A

Br2(aq) + 2NaCl(aq)
No reaction

39
Q

What is a REDOX reaction?

A

A reaction when one reactant is oxidised and another is reduced

40
Q

What is oxidation?

A

Loss of electrons

41
Q

What is reduction?

A

Gain of electrons

OLD Y13 Chem (9 decks)

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