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Inorganic Chemistry > Period 3 > Flashcards

Period 3 Flashcards

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1
Q

Rank elements of period 3 from highest melting point to lowest

A

Si>Al>Mg>Na>s8>p4>cl2>Ar

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2
Q

What are the products when Na reacts with O2

A

Na2O

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3
Q

What are observations when Na reacts with O2

A

White solid

Yellow flame

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4
Q

Products of Mg reaction with O2

A

MgO(s)

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5
Q

Observation of Mg reaction with O2

A

White solid

White flame

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6
Q

Products when Al reacts with O2

A

Al2O3(s)

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7
Q

Observations when Al reacts with O2

A

White solid

Bright white flame

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8
Q

Observation and product of reaction of Si with O2

A

SiO2(s)
Grey/white solid
Very slow reaction

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9
Q

What are products when P4 reacts with O2 in limited heat

A

P4O6 (s)

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10
Q

What are products when P4 reacts with O2 in excess heat

A

P4O10(s)

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11
Q

Observations of reaction of P4 woth O2

A

White solid

White flame

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12
Q

Product and observation of reaction of S8 with O2 with heat

A

SO2 (colourless gas)
Blue flame
Yellow solid disappears

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13
Q

What are the conditions of reaction of SO2 with O2

A

V2O5-catalyst
Heat
Product formed-SO3

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14
Q

Name the type of reaction when period 3 elements react with oxygen

A

Exothermic Redox

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15
Q

Name the basic period 3 oxides

A

Na2O

MgO

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16
Q

Name an amphoteric oxide in period 3 and describe its bonding and structure

A

Al2O3
Ionic with covalent character
Giant ionic

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17
Q

Name the acidic oxides in period 3

A 
SiO2
P4O6
P4O10
SO2
SO3
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18
Q

What are the products of the reaction
Na2O + H2O—-> ?
And what is pH of solution

A

NaOH(aq)

PH=14 (alkaline)

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19
Q

MgO+H2O—->?

pH of solution?

A

Mg(OH)2 (aq)

pH=8 (slightly alkaline)

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20
Q

Al2O3 + H2O—->

A

Insoluble

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21
Q

SiO2 + H2O—->

A

Insoluble

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22
Q

P4O6 + H20—->?

pH=?

A

H3PO3

pH=3

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23
Q

P4O10+H2O—–>?

pH=?

A

H3PO4

pH=3

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24
Q

SO2 + H2O—->?

pH=?

A

H2SO3(aq)

pH=2

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25
Q

SO3 + H2O—–> ?

pH= ?

A

H2SO4
pH=1
Acidic

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26
Q

Na2O + HCl—–>?

A

NaCl+H2O

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27
Q

MgO+HCl—->

A

MgCl2+ H2O

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28
Q

Al2O3 + HCl—–>

A

AlCl3 + H2O

29
Q

Al2O3 + NaOH (excess)—->

A

NaAl(OH)4

30
Q

SiO2 + conc. Hot NaOH—->

A

Na2SiO3 + H2O

31
Q

P4O6 + NaOH—->

A

Na3PO3 + H2O

32
Q

P4O10 + NaOH—->

A

Na3PO4+H2O

33
Q

SO2 + NaOH—->

A

Na2SO3 + H2O

34
Q

SO3(g) + NaOH—->

A

Na2SO4 + H2O

35
Q

What is the anion of SO2

A

SO3²-

36
Q

What is the anion of SO3

A

SO4²-

37
Q

What is the anion of P4O6

A

PO3³-

38
Q

What is the anion of P4O10

A

PO4³-

39
Q

What is the anion of CO2

A

CO3²-

40
Q

What is the anion of SiO2

A

SiO3²-

41
Q

What are the anions of NO2

A

NO3- and NO2-

42
Q

Basic Oxide + Acidic Oxide—>?

A

Salt only

43
Q

Na+H2O—->

A

Na(OH) + H2(g)

44
Q

Mg + H2O—->

A

Mg(OH)2 slow reaction

45
Q

Mg + H2O(g)/steam—->

A

MgO + H2 (g) vigerous reaction

46
Q

Na+Cl2(g)——>?

Observations

A

NaCl
White solid
Yellow flame

47
Q

Mg + Cl2—->?

Observations?

A

MgCl2(s)
White solid
White flame

48
Q

2Al + 3Cl2—->

Observations?

A

Al2Cl6
White solid
White flame

49
Q

Si + Cl2—->

Observation?

A

SiCl4 (l)

Colorless liquid

50
Q

P4 + (limited) Cl2 —–>

Observation?

A

PCl3
Colorless liquid
White flame

51
Q

P4 + excess Cl2 —->

Observation?

A

PCl5
White solid
White flame

52
Q

Type of reaction between period 3 elements amd Cl2?

A

Exothermic Redox

53
Q

Conditions for reaction of period 3 elements with O2 and Cl2

A

Heat

54
Q

Describe the structure and bonding in NaCl

A

Ionic bonding

Giant Ionic lattice

55
Q

Describe the structure and bonding in Al2Cl6

A

Covalent

Simple molecular structure

56
Q

Describe structure and bonding in PCl5

A

Covalent

Simple molecular structure

57
Q

What happens when NaCl is placed in water

A

Dissolves
Na+(aq) Cl- (aq) ions
pH= 7 (neutral)

58
Q

What happens when MgCl2 is added to water

A

Mg²+(aq) Cl-(aq)
Dissolves
pH= 6.5
Slightly acidic

59
Q

AlCl3 + H2O—>

A

Partial hydrolysis
[Al(OH)(H2O)5]+2 + H+ 3Cl-
pH=3 (slightly acidic)

60
Q

SiCl4 + H2O—->

Observations?

A 
SiO2/ Si(OH)4 + 4HCl
White fumes of HCl gas 
White ppt
Complete hydrolysis 
pH= 2 (acidic)
61
Q

PCl3 + H2O—->

A

Complete hydrolysis
H3PO3 + HCl
pH= 2

62
Q

PCl5 + H2O—->

A

Complete hydolysis
H3PO4 + HCl(g)
pH= 2
acidic chlorides react with water to form acidic solutions

63
Q

Is nitric acid a strong or weak acid

A

Strong

64
Q

Is phosphoric and phosphurous acid strong or weak?

A

Weak

65
Q

Is sulfurous acid a strong or weak acid?

A

Weak

66
Q

Describe lattice structure of SiO2

A

Giant
Tetrahedral
4 Si-O bonds

67
Q

Observation when PCl5 reacts with excess water

A

Steamy/misty fumes

68
Q

Describe as fully as you can what would you see when sodium is reacted with water

A

Metal floats
Dissolves
Vigerous reaction
Effervescence of H2 gas

Inorganic Chemistry (4 decks)

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