Which of the following are Period 3 Oxides?

Na2O, P4O10, SiO2, MgO, SO2, Al2O3,, P4O10, SO2, Al2O3

What is the reaction of sodium and cold water?

2 Na (s) + 2 H2O (l) --> 2 NaOH (aq) + H2 (g)

Which oxides are non-metal, simple molecular and covalent?

only P4O10 (s) , SO2 (g), SO3 (g)

Which equations shows Al2O3 acting as a base?

Al2O3 + 3H2SO4 --> Al2(SO4 )3 + 3H2O

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AQA Chemistry A-Level Period 3

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#Reactions #of #the #Period #3 #Elements #and #Oxides #AQA #Chemistry #ALevel #Exams https://chemrevise.files.wordpress.com/2018/02/2-4-revision-guide-period-3.pdf

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Answers

1
SiO₂ has a giant covalent structure, this stops SiO₂ dissolving or reacting with water.
False
True
2
Which of the following are Period 3 Oxides?
Na2O, P4O10, SiO2, MgO, SO2, Al2O3,
P4O10, SO2, Al2O3
SiO, MgOH, Na2O, AlO3, SO3, P4O10
Na2O, P2O5, SiO2, MgO, SO2, Al2O3,
3
The non-metal, simple molecular, covalent, oxides react with water to give which acids?
SO2 (g) + H2O (l) --> H2SO3 (aq)
All of them
SO3 (g) + H2O (l) --> H2SO4 (aq)
P4O10 (s) + 6 H2O (l) --> 4 H3PO4 (aq)
4
What is the reaction of sodium and cold water?
Na (s) + H2O (l) --> NaOH (aq) + H2 (g)
Na (s) + H2O (l) --> 2 Na2O (s) + H2 (g)
2 Na (g) + 2H2O (g) --> 2NaOH (s) + H2 (g)
2 Na (s) + 2 H2O (l) --> 2 NaOH (aq) + H2 (g)
5
Why is Na stored under oil, and K under water?
None of the answers
So they can react with water
To stop them reacting with air
To keep them wet
6
The basic oxides react with .... to make salt and water
alkali
water
hydrogen
acid
7
Which oxides are non-metal, simple molecular and covalent?
only P4O10 (s)
only SO2 (g) and SO3 (g)
only P4O10 (s) , SO2 (g), SO3 (g)
only SO2 (g)
8
Which metal oxides are ionic?
Na2O, MgO, SiO2
Na2O, MgO, Al2O3
MgO, Al2O3, P4O10
P4O10, SiO2, MgO
9
What are the observations when sulfur burns in oxygen?
Blue Flame, Acidic Choking Gas
Blue Flame, Alkaline Choking Gas
Yellow Flame, Acidic Choking Gas
Green Flame, Acidic Choking Gas
10
What are the observations when sodium burns in oxygen?
Yellow Flame, White Solid
White Flame, Yellow Solid
Green Flame, White Fumes
Yellow Flame, White Fumes
11
What does amphoteric mean?
Acts just as a base
Acts just as an acid
Acts as an acid and a base
Acts as just an alkali
12
Despite being ionic, Al₂O₃ shows some covalent character, why?
All of them
Small, high charge aluminium ion gets close to the oxide ion
Electron cloud is distorted, doesn't fit perfect ionic model
Small difference in electronegativity
13
Which equations shows Al₂O₃ acting as a base?
Al2O3 + 3H2SO4 --> Al2(SO4 )3 + 3H2O
Al2O3 + 2NaOH + 3H2O --> 2NaAl(OH)4
14
The ionic oxides are basic as the oxide ions accept protons from water to become hydroxide ions
False
True
15
Mg, Al, Si and P burn with a white flame to give white solid smoke.
False
True

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