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Chemistry: Inorganic > Properties of Period 3 > Flashcards

Properties of Period 3 Flashcards

(54 cards)

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1
Q

Why is Na more reactive than Mg

A

Na has 1 electron in the outer shell and Mg has 2

takes less energy to lose 1 electron than 2

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2
Q

What is the equation for the reaction wish Na and Water

A

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

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3
Q

What is the observation and the product formed in the reaction with Na and Water

A

Obs:
Exothermic, gas produced

Product:
Colourless very alkali solution

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4
Q

What is the equation for the reaction with Mg and Cold Water

A

Mg(s) + H2O(l) > Mg(OH)2(s) + H2(g)

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5
Q

What is the observation and the product formed in the reaction with Mg and Cold Water

A

Obs:
minor bubbles

Product:
Sparingly soluble weakly alkaline solution

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6
Q

What is the equation for the reaction with Mg and Steam

A

Mg(s) + H2O(g) > MgO(s) + H2(g)

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7
Q

What is the observation and the product formed in the reaction with Mg and Steam

A

Obs:
White flame, white solid (fast reaction)

Product:
basic solid

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8
Q

What is the equation for the reaction of Na with Oxygen

A

2Na(s) + 1/2O2(g) > Na2O(s)

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9
Q

What is the observation in the reaction between Na and Oxygen

A

Yellow flame (or orange)

Yellow solid

Reacts readily in air

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10
Q

What is the equation for the reaction of Mg with Oxygen

A

Mg(s) + 1/2O2(g) > MgO(s)

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11
Q

What is the observation in the reaction between Mg and Oxygen

A

White flame

White solid

Reacts readily in air

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12
Q

What is the equation for the reaction of Al with Oxygen

A

2Al(s) + 1,1/2O2(g) > Al2O3(s)

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13
Q

What is the observation in the reaction between Al and Oxygen

A

reacts slowly

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14
Q

What is the equation for the reaction of Si with Oxygen

A

Si(s) + O2(g) > SiO2(s)

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15
Q

What is the observation in the reaction between Si and Oxygen

A

reacts slowly

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16
Q

What is the equation for the reaction of P4 with Oxygen

A

P4(s) + 5O2(g) > P4O10(s)

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17
Q

What is the observation in the reaction between P4 and Oxygen

A

White smoke

White flame

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18
Q

Why is P4 (Phosphorus) stored in oil or under water?

A

P4 ignites spontaneously in air

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19
Q

What is the equation for the reaction of S with Oxygen

A

S(s) + O2(g) > SO2(g)

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20
Q

What is the observation in the reaction between S and Oxygen

A

Blue flame

Choking gas (SO2)

Reacts readily in air

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21
Q

What are properties of Period 3 Metal oxides

A

bonding is ionic

the structure is giant ionic lattice

they behave as bases

*Al2O3 also behave as an acid- AMPHOTERIC**

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22
Q

What are properties of Period 3 Non-Metal oxides

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A

bonding is covalent

the structure is either macromolecular (SIO2 contain strong covalent bonds) OR simple molecular (P4O10, SO3, SO2 contain weak IMF)

behave as acids

23
Q

What is the shape and angle of SO3

Study These Flashcards
A

trigonal planar
120°

24
Q

What is the angle of SO2

Study These Flashcards
A

has a lone pair

115.5°

25
Why does SiO2 have a high boiling point compared to the other non metal oxides
has a macromolecular structure - strong covalent bonds require alot of energy to break
26
What is the melting point of Na2O
high
27
What is the melting point of MgO
very high
28
What is the melting point of Al2O3
high
29
What is the melting point of SiO2
high
30
What is the melting point of P4O10
low ~300°C
31
What is the melting point of SO3 and SO2
low
32
What is the equation of the reaction between Na2O and water and the pH of the product
Na2O(s) + H2O(l) > 2Na(OH)2(aq) pH=12-14 (very alkali)
33
What is the equation of the reaction between MgO and water
MgO(s) + H2O(l) > Mg(OH)2(aq) pH=9-10 (alkali but sparingly soluble)
34
Why is there no reaction with Al2O3 and SiO2 in water and what is their pH
they’re insoluble pH=7
35
What is the equation of the reaction between P4O10 and water and what is the pH of the product
P4O10(s) + 7H2O(l) > 4H3PO4(aq) pH=1 (phosphorus acid is formed)
36
What is the equation of the reaction between SO2 and water and what is the pH of the product
SO2(g) + H2O(l) > H2SO3(aq) pH=1 (Sulphuric (IV) acid is formed)
37
What is the equation of the reaction between SO3 and water and what is the pH of the product
SO3(g) + H2O(l) > H2SO4(aq) pH=0 (Sulphuric (VI) acid is formed)
38
What is the equation for the full dissociation of H3PO4
H3PO4 ⇌ 3H+ + PO4^3-
39
What are the 3 stages of the dissociation of H3PO4
1. H3PO4 > H+ + H2PO4- 2. H2PO4- ⇌ H+ + HPO4^2- 3. HPO4^2- ⇌ H+ + PO4^3-
40
What is the equation for the dissociation of H2SO4
H2SO4 ⇌ 2H+ HSO4^2-
41
What are the 2 stages of the dissociation of H2SO4
1. H2SO4 > H+ + HSO4- 2. HSO4- ⇌ H+ SO4^2-
42
What reagent/test that could distinguish between aq solutions of SO2 and SO3
universal indicator
43
What is the observation of SO2 and SO3 in universal indicator
SO2 = orange-red SO3 = red
44
What is formed when an acid and base react
salt and water acid + base > salt + water
45
What is the equation for the reaction between Na2O (solid basic oxide) with HCl
Na2O(s) + 2HCl(aq) → 2NaCl(aq) + H2O(l)
46
What is the equation for the reaction between Na2O (solid basic oxide) with H2SO4
Na2O(s) + H2SO4(aq) > Na2SO4(aq) + H2O(l)
47
What is the equation for the reaction between Na2O (solid basic oxide) with H3PO4
3Na2O(s) +2H3PO4(aq) > 2Na3PO4(aq) +3H2O(l)
48
What is the equation for the reaction between MgO (solid basic oxide) with HCl
MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l)
49
What is the equation for the reaction between MgO (solid basic oxide) with H2SO4
MgO(s) + H2SO4(aq) → MgSO4(aq) + H2O(l)
50
What is the equation for the reaction between MgO (solid basic oxide) with H3PO4
3MgO(s) +2H3PO4(aq) > Mg4(PO4)2(aq) + 3H₂O(l)
51
What is the equation for the reaction between NaOH (aq basic hydroxide) with HCl
NaOH(aq) + HCl(aq) > NaCl(aq) + H₂O(l)
52
What is the equation for the reaction between Al2O3 (solid basic oxide) with HCl
Al2O3(s) + 6HCl(aq) > 2AlCl3(aq) + 3H2O(l)
53
What is the equation for the reaction between Mg(OH) (basic hydroxide) with HCl
Mg(OH)2(s) + 2HCl(aq) > MgCl2(aq) + 2H2O(l)
54
What is the equation for the reaction between Al2O3 (acidic oxide) with HCl
Al2O3(s) + 2NaOH(aq) + 3H2O(l) + 2NaAl(OH)4

Chemistry: Inorganic (6 decks)

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