Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > Period 3 oxides 3.2.4 > Flashcards

Period 3 oxides 3.2.4 Flashcards

1
Q

When period 3 oxides burn in oxygen what do they form?

A

white solid oxides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the reaction between sodium and oxygen?

A

4Na + O2 => 2Na2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the reaction between magnesium and oxygen ?

A

2Mg + 1/2O2 => MgO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the reaction between aluminium and oxygen?

A

4Al + 3O2 => 2Al2O3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the reaction between silicon and oxygen ?

A

Si + O2 => SiO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the reaction between phosphorus and oxygen ?

A

P4 + 5O2 => P4O10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does sodium react with water?

A
  • Vigorously
  • Forms a ball and fizzing
  • Hydrogen gas is produced
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the reaction of sodium and water ?

A

2Na + 2H2O => 2NaOH + H2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the reaction between sodium oxide and water?

A

Na2O + H2O => 2NaOH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what’s the ph of sodium oxide?

A

14

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What’s the reaction between sodium oxide and acid?

A

Na2O + 2H+ => 2Na+ + H20

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what happens when magnesium reacts with water?

A
  • reacts slowly
  • forms a weak alkaline solution of magnesium hydroxide ( Mg(OH)2)
  • this is a weak alkaline solution as magnesium hydroxide is sparingly soluble
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what’s the reaction of magnesium and water?

A

Mg + 2H2O => Mg(OH) + H2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What’s the reaction between magnesium and steam?

A

Mg + H2O => MgO (s) + H2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

why is magnesium oxide less soluble than sodium oxide?

A

magnesium oxide has higher lattice enthalpy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what’s the reaction between magnesium oxide and water?

A

Mgo + H2O => Mg(OH)2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what’s the ph of magnesium oxide ?

A

10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what’s the reaction between magnesium oxide and acid?

A

MgO + 2H+ => Mg2+ + H2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

why is aluminium oxide insoluble?

A

very high lattice enthalpy

20
Q

what name is given to aluminium oxide

A

amphoteric

21
Q

what’s the reaction between aluminium oxide and acid?

A

Al2O3 + 6H+ => 2Al3+ + 3H2O

22
Q

what’s the reaction between aluminium oxide and alkali?

A

Al2O3 + 6H+ => 2Al3+ + 3H2O

23
Q

what’s the reaction between aluminium oxide and hydrochloric acid?

A

Al2O3 + 6HCl => 2AlCl3 + 3H2O

24
Q

what’s the reaction between aluminium oxide and sodium hydroxide?

A

Al2O3 + 2NaOH + 3H2O => 2NaAl(OH)4

25
Q

why is silicon (IV) oxide insoluble (SiO2) ?

A

lattice of atoms linked by strong covalent bonds that would have to be broken

26
Q

what’s the reaction between silicon oxide and an alkali?

A

SiO2 + 2OH- => SiO3- +H2O

27
Q

what’s the reaction between phosphorus oxide and water?

A

P4O10 + 6H2O => 4H3PO4

28
Q

what is the ph of phosphorus oxide and why?

A

1.5
H2O molecules attach the S+ P atoms leading to the release of H+ ions from the water molecules

29
Q

what’s the reaction between phosphorus oxide and alkali?

A

P4O10 + 12OH- => 4PO43- +6H2O

30
Q

What happens when Sulfur oxide (SO2) reacts with water?

A

it dissolves

31
Q

what’s the rection between sulfur oxide and water?

A

SO2 + H2O => H2SO3

32
Q

what’s the ph of sulfur oxide and why?

A

1.3
H2O molecules attach to the S+ S atoms , leading to the release of H+ ions from the water molecules

33
Q

what’s the reaction between sulfur oxide and alkali?

A

SO2 + 2OH- => SO3 2- + H2O

34
Q

What happens when Sulfur (VI) oxide (SO3) reacts with water?

A

reacts violently

35
Q

what’s the reaction between SO3 and water?

A

SO3 + H2O => H2SO4

36
Q

what’s the ph of SO3 and why?

A

0

H2O molecules attach to the S+ S atoms , leading to the release of H+ ions from the water molecules

37
Q

what’s the reaction between sulfur trioxide and hydroxide ?

A

SO3 + 2OH- => SO4 2- +H2O

38
Q

what’s the trend in PH in period 3 oxides?

A
  • Acidity increased from left to right
  • Ranging from strongly basic oxides on the left to strongly acidic on the right
  • with an amphoteric oxide in the middle
39
Q

Why do Na2O , MgO and Al2O3 have high melting points?

A
  • form giant ionic lattices
  • giant ionic lattices have lots of strong attractive forces which require a lot of energy to break the bonds
40
Q

why does MgO have a higher melting point than Na2O?

A

It forms 2+ ions and Na forms +1 ions.
The 2+ ions are attracted more strongly to the oxygen

41
Q

Why does Al2O3 have a lower melting point than MgO?

A
  • Al3+ ions distort the electron cloud of oxygen.
    This means that there’s some covalent character as well as ionic interactions.
    Less energy is required to break the bonds
42
Q

Why does SiO2 have a higher melting point than the non metal oxides (P4O10 and SO2)?

A
  • Forms a giant covalent structure.
    Many strong covalent bonds which require lots of energy to break.
43
Q

Why does P4O10 and SO4 have lower melting points than SiO2?

A
  • They form simple molecular structure.
    Weaker intermolecular forced so less energy required to break the bonds
44
Q

why does the reaction of sodium oxide reacting with water forms a solution that is more alkaline?

A

Sodium has a higher solubility

45
Q

what’s the equation for sulfur reacting with oxygen ?

A

S + O2 => SO2

46
Q

what would you see if you react sulfur with oxygen ?

A

Brown fumes

Chemistry (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions