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A Level Chemistry > Group 7 > Flashcards

Group 7 Flashcards

1
Q

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 + 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

dive the product of the equation
NaF(s) + H2SO4(aq) –>

A

NaHSO4(s) + HF

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7
Q

give the half equation for the oxidation for bromide ions

A

2Br- –> Br2 + 2e-

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8
Q

what is he 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 redox reaction

A

Sulfur dioxide (SO2)
sulfur (S)
Hydrogen Sulfide (H2S)

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11
Q

what is the observed when iodine is formed in a reaction with sulfuric acid

A

Black solid

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12
Q

what is observed when H2S is formed in a reaction with sulfuric acid

A

Bad egg smell

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13
Q

what is observed when Sulphur is formed in a reaction using sulfuric acid

A

Yellow solid

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14
Q

what is observed when SO2 is formed a reaction using sulfuric acid

A

Acidic gas

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15
Q

yellow solid and 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 the reaction occurs
Ag+(aq) + F-(aq) –> AgF(aq)

A

colorless solution

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) + l-(aq) –> Agl(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 concentrated ammonia (NH3) is added to AgBr

A

Cream precipitate dissolves

25
Q

what is observed when concentrated 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 –>

A

HCIO(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 produces 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:
I2(aq) + 2NaCl(aq) –>

A

no reaction ( brown solution remains)

34
Q

give the products of the reaction:
Cl2(aq) + 2NaBr –>

A

Br2(aq) + 2NaCl(aq)

35
Q

give the products of the reaction:
Br2(aq) + 2NaI(aq)–>

A

I2(aq) + 2NaBr(aq)

36
Q

hive the product of the reaction:
Br2(aq) + 2NaCl(aq) –>

A

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

37
Q

what is a REDOX reaction

A

A reaction when one reactants is oxidised and another is reduced

38
Q

what is oxidation

A

loss of electrons

39
Q

what is reduction

A

gain of electrons

A Level Chemistry (12 decks)

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