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A Chem > Period 3 > Flashcards

Period 3 Flashcards

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1
Q

Na20 ph

A

14

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2
Q

Na20 structure

A

Ionic

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3
Q

Na20 + water équations

A

Na20 + H20—>2NaOH(aq)
Then dissolves
O2- + H20 —> 2 OH-

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4
Q

Na20 + acid equation

A

Na20 + 2H+—>2Na+ + H20

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5
Q

What two oxides are basic

A

Mg0
Na20

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6
Q

What pH does MgO have

A

10

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7
Q

P4O10 ph

A

0

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8
Q

SO2 pH

A

3

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9
Q

SO3 pH

A

0

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10
Q

MgO structure

A

Ionic
-higher mp than Na20 due to smaller atomic radius and higher nuclear charge with similar shielding

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11
Q

MgO + water equations

A

Mg0 + H2O—>Mg(OH)2 (aq)
Some dissolve in water(less than Na20 due to higher lattice enthalapy
02- + H20–> 20H-

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12
Q

What oxide is amphoteric

A

Al203

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13
Q

MgO reaction with an acid

A

MgO + 2H+—>Mg2+ + H2O

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14
Q

Al203 + acid

A

Al203 + 6H+ —>2Al3+ + 3H2O

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15
Q

Al2O3 + alkali

A

Al2O3 + 2OH- + 3H20–>2 Al(OH)4-

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16
Q

SiO2 + alkali

A

SiO2 + 2OH- —> Si03 2- + H2O

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17
Q

P4O10 + alkali

A

P4O10 + 12 OH- —>4PO4 3- + 6 H2O

18
Q

SO2 + alkali

A

SO2 + 2OH- —> SO3 2- + H2O

19
Q

SO3 + alkali

A

SO3 + 2OH- —>SO4 2- + H2O

20
Q

4N’a + O2

A

2Na2O

21
Q

2Mg + O2

A

2 MgO

22
Q

4Al + 302

A

2Al2O3

23
Q

Si + O2

A

SiO2

24
Q

P4 + 5O2

A

P4O10

25
Q

S+ O2

A

SO2

26
Q

2Na2O observation

A

Yellow orange flame
White powder

27
Q

2MgO observation

A

White flame
Powder

28
Q

2Al203 observation

A

White flame
Powder

29
Q

SiO2 observation

A

White flame
Powder

30
Q

P4010 observation

A

Bright white flame
Powder

31
Q

SO2 observation

A

Blue flame
Choking gas

32
Q

Electronegativity

A

Ability to attract a pair of electrons

33
Q

Why does electronegativity increase across period 3

A

Increased nuclear charge
Similar shielding

34
Q

First ionisation energy

A

Energy needed to remove one electron from 1 electron from 1 mole of gaseous atom

35
Q

2NaOH + H2

A

Effervescence
Yellow orange flame

36
Q

MgO + H2

A

White flame
Powder

37
Q

Mg(OH)2 + H2

A

Very slow

38
Q

HCl + HOCl

A

Pale green solution

39
Q

Acid plus base

A

Salt with bases metal and water

40
Q

Phosphorus oxide plus water

A

P4O10 + 6H2O—> 4H3PO4

41
Q

Sulfur dioxide plus water

A

SO2 + H2O —>H2SO3

42
Q

Sulfur trioxide plus water

A

SO3 + H2O —>H2SO4

A Chem (11 decks)

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