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chemistry > period 3 > Flashcards

period 3 Flashcards

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1
Q

state two observations for the reaction of sodium and water

A

floats
effervescence

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2
Q

write an equation for the reaction of sodium and water

A

2Na + 2H2O -> 2NaOH + H2

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3
Q

state one observation for the reaction of magnesium and cold water

A

small amount of effervescence

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4
Q

write an equation for the reaction of Magnesium and cold water

A

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

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5
Q

state two observations for the reaction of magnesium and steam

A

bright white light
white solid formed

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6
Q

write an equation for the reaction of magnesium and steam

A

Mg + H2O -> MgO + H2

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7
Q

state two observations for the reaction of sodium and oxygen

A

yellow flame
white solid formed

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8
Q

write an equation for the reaction of sodium and oxygen

A

4Na + O2 -> Na2O

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9
Q

State the type of bonding and crystal structure in sodium oxide

A

ionic
giant ionic lattice

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10
Q

write an equation for the reaction of sodium oxide and water

A

Na2O + H2O -> 2NaOH

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11
Q

state the pH of the solution formed hen sodium oxide dissolves in water

A

12-14

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12
Q

write an equation to show the reaction of sodium oxide and hydrochloric acid

A

Na2O + 2HCl -> 2NaCl + H2O

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13
Q

state the two observations for the reaction of magnesium and oxygen

A

white light
white solid formed

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14
Q

write an equation for the reaction of magnesium and oxygen

A

2Mg + O2 -> MgO

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15
Q

state the type of bonding na crystal structure in magnesium oxide

A

ionic
giant ionic lattice

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16
Q

write an equation for the reaction magnesium oxide and water

A

MgO + H2O -> Mg(OH)2

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17
Q

state the pH of the solution formed when magnesium oxide dissolves in water

A

9-10
[ Mg(OH)2 is sparingly soluble ]

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18
Q

write an equation to show the reaction magnesium oxide and HCl

A

MgO + 2HCl -> MgCl2+ H2O

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19
Q

state two observations for the reaction of aluminium and oxygen

A

white light
white powder formed

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20
Q

write an equation for the reaction of aluminium and oxygen

A

4Al + 3O2 -> 2Al2O3

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21
Q

state the type of bonding and crystal structure in aluminium oxide

A

ionic
giant ionic lattice

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22
Q

write the equation for the reaction of aluminium oxide and water

A

none of
aluminium oxide is insoluble

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23
Q

state the pH of the mixture formed between aluminium oxide and water

A

7

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24
Q

state the definition for amphoteric

A

a substance which reacts with both acids and bases

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25
write an equation to show the reaction of aluminium oxide and HCl
Al2O3 + 6HCl -> 2AlCl3 + 3H2O
26
write an equation to show the reaction of aluminium oxide and sodium hydroxide
Al2O3 + 2NaOH + 3H2O -> 2NaAl(OH)4
27
write an equation for the reaction of silicon and oxygen
Si + O2 -> SiO2
28
state the type of bonding and crystal structure in silicon dioxide
covalent giant covalent / macromolecular
29
write an equation for the reaction of silicon dioxide nad water
no reaction - silicon dioxide is insoluble
30
state the pH of the mixture formed with silicon dioxide and water
7
31
write an equation to show the reaction of silicon dioxide and sodium hydroxide
SiO2 + 2NaOH -> Na2SiO3 + H2O
32
state the two observations for the reaction of phosphorus and oxygen
bright white flame white solid formed
33
write an equation for the reaction of phosphorous and oxygen
4P + 5O2-> P4O10
34
state the type of bonding and crystal structure in phosphorous (V) oxide
covalent simple molecular
35
write an equation for the reaction of phosphorus (V) oxide and water
P4O10 + 6H2O -> 4H3PO4
36
state the pH of the solution formed when phosphorous (v) oxide dissolves in water
0-1
37
37. draw the displayed formula for phosphoric (v) acid and state the shape and bond angle of the phosphate (V) ion
look at photos
38
write an equation to show the reaction of phosphorus (V) oxide and sodium hydroxide
P4O10 + 12NaOH -> 4Na3PO4 + 6H2O
39
write an equation to show the reaction of phosphorus (V) oxide and sodium oxide
6Na2O + P4O10 -> 4Na3PO4
40
write an equation to show the reaction of phosphoric (v) acid and magnesium oxide
3MgO + 2H3PO4 -> Mg3(PO4)2 + 3H2O
41
rite an equation to show the reaction of phosphoric (V) acid snd sodium hydroxide
H3PO4 + 3NaOH -> Na3PO3 + 3H2O
42
state two observations for the reaction of sulfur and oxygen
blue flame white gas
43
write an equation for the reaction of sulfur and oxygen
S + O2 -> SO2
44
write an equation for the reaction to convert sulphur (IV) oxide into sulphur (VI) oxide
2SO2 + O2 -> 2SO3
45
state the type of bonding and crystal structure in sulfur (IV) oxide
covalent simple molecular
46
state the type of bonding and crystal structure in sulfur (VI) oxide
covalent simple molecular
47
write an equation for the reaction of sulphur (IV) oxide and water
SO2 + H2O -> H2SO3
48
state the pH of the solution formed when sulfur (IV) oxide dissolves in water
2-4
49
49. draw the displayed formula for sulfuric (IV) acid and state the shape and bond angle of the sulfate (IV) ion
look at photos
50
write an equation to show the reaction of sulfur (IV) oxide and sodium hydroxide
SO2 + 2NaOH -> Na2SO3 + H2O
51
write an equation to show the reaction of sulfuric (IV) acid and sodium hydroxide
H2SO3 + NaOH -> NaHSO3 +H2O
52
write an equation for the reaction of sulfur (VI) oxide and water
SO3 + H2O -> H2SO4
53
state the pH of the solution formed when sulfur (VI) oxide dissolves in water
0-1
54
54. draw the displayed formula for sulphuric (VI) acid and state the shape and bond angle of the sulfate (VI) anion
look at photos
55
write an equation to show the reaction of sulfur (VI) oxide and potassium hydroxide
SO3 + 2KOH -> K2SO4 + H2O
56
write an equation for show the reaction of sulfuric (VI) acid and sodium hydroxide
H2SO4 + NaOH -> NaHSO4 + H2O
57
explain why magnesium oxide has a higher melting point than sodium oxide
magnesium has a greater charge (+2) and smaller ion stronger electrostatic attraction between positive and negative ions
58
explain why sulfur (IV) oxide has a lower melting point than sulfur (VI) oxide
SO2is a smaller molecule than SO3 less energy needed to overcome Van de waals forces between molecules
59
59.state whether phosphorus (V) oxide or silicon dioxide has a higher melting point
silicon dioxide
60
explain Q59 in terms of structure and bonding (59.state whether phosphorus (V) oxide or silicon dioxide has a higher melting point)
phosphorus (V) oxide is a simple covalent molecule weak Van de waals forces between molecules silicon dioxide is a giant covalent structure lots of strong covalent bonds require large amount of energy to break

chemistry (14 decks)

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