A2- Period 3 (inc. oxides)

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Write an equation for the reaction of sodium with water

Back (Answer)

Na(s) + H2O(aq) –> NaOH(aq) + ½H2 (g)

Front (Question)

Describe what is observed when sodium reacts with water

Back (Answer)

fizzing due to H2 being produced, moves on surface

Front (Question)

Write an equation for the reaction of magnesium with steam

Back (Answer)

Mg(s) + H2O(g) –> MgO(s) + H2(g)

Front (Question)

Describe what is observed when magnesium reacts with steam

Back (Answer)

Mg burns with bright white light, white solid formed

Front (Question)

Write an equation for the reaction of Na with oxygen

Back (Answer)

2Na + 1/2O2 –> Na2O

Front (Question)

Describe what is observed when reacts Na with oxygen

Back (Answer)

Na burns with orange/yellow flame, white solid produced

Front (Question)

Write an equation for the reaction of Mg with oxygen

Back (Answer)

Mg(s) + 1/2O2(g) –> MgO(s)

Front (Question)

Describe what is observed when Mg reacts with oxygen

Back (Answer)

Mg burns with bright white flame, white solid produced

Front (Question)

Write an equation for the reaction of Al with oxygen

Back (Answer)

4Al + 3O2 –> 2Al2O3

#10

Front (Question)

Write an equation for the reaction of Al2O3 + NaOH

Back (Answer)

Al2O3 + 2NaOH + 3H2O –> 2 NaAl(OH)4

#11

Front (Question)

Write an equation for the reaction of Si with oxygen

Back (Answer)

Si(s) + O 2 (g) –> SiO 2 (g)

#12

Front (Question)

Describe what is observed when Si reacts with oxygen

Back (Answer)

Si burns with a white flame, grey solid formed

#13

Front (Question)

Write an equation for the reaction of P with oxygen

Back (Answer)

P4 (s) + 5O2(g) –> P4O10(s)

#14

Front (Question)

Describe what is observed when P reacts with oxygen

Back (Answer)

P burns with a white flame, white solid formed

#15

Front (Question)

Write an equation for the reaction of S with oxygen

Back (Answer)

S8(s) + 8O2 (g) –> 8SO 2 (g)

#16

Front (Question)

Describe what is observed when S reacts with oxygen

Back (Answer)

S burns with a blue flame, gaseous SO2 formed (turns UI red)

#17

Front (Question)

Explain how to produce SO3

Back (Answer)

React SO2 with O2 with V2O5 catalyst

#18

Front (Question)

Write an equation for the reaction of Na2O with water, state the pH of the solution formed

Back (Answer)

Na2O + H2O –> 2NaOH pH 14

#19

Front (Question)

Write an equation for the reaction of MgO with water, state the pH of the solution formed

Back (Answer)

MgO + H2O –> Mg(OH)2 pH 10

#20

Front (Question)

Explain why MgO produces a less basic solution than Na2O

Back (Answer)

Mg(OH)2 is sparingly soluble in water, much lower OH - ion concentration

#21

Front (Question)

Explain why Al2O3 and SiO2 do not react with water

Back (Answer)

lattice too strong to break

#22

Front (Question)

Write an equation for the reaction of P4O10 with water, state the pH of the solution formed

Back (Answer)

P4O10 + 6H2O –> 4H3PO4 pH 1-2

#23

Front (Question)

Write an equation for the reaction of SO2 with water, state the pH of the solution formed

Back (Answer)

SO2 + H2O –> H2SO3 pH 1-2

#24

Front (Question)

Write an equation for the reaction of SO3 with water, state the pH of the solution formed

Back (Answer)

SO3 + H2O –> H2SO4 pH 1-2