periodicity of period 3 oxides

Question 1

write an equation for the reaction of sodium with water

Answer 1

Na(s)+H2O(aq) = NaOH(aq) + 0.5H2(g)

Question 2

describe what is observed when sodium reacts with water

Answer 2

Na floats, fizzes due to hydrogen production, moves around on the surface of the water

Question 3

write an equation for the reaction of magnesium with steam

Answer 3

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

Question 4

describe what is observed when magnesium reacts with steam

Answer 4

Mg burns with a bright white light, white solid formed

Question 5

write an equation for the reaction of Na with oxygen

Answer 5

2Na(s)+0.5O2(g) = Na2O(s)

Question 6

describe what is observed when Na reacts with oxygen

Answer 6

Na burns with an orange flame, white solid of Na2O produced

Question 7

write an equation for the reaction of Mg with oxygen

Answer 7

Mg(s)+0.5O2(g) = MgO(s)

Question 8

describe what is observed when Mg reacts with oxygen

Answer 8

Mg burns with a bright white light, white solid produced

Question 9

write an equation for the reaction of Al with oxygen

Answer 9

4Al(s)+3O2(g) = 2Al2O3(s)

Question 10

describe what is observed when Al reacts with oxygen

Answer 10

Al burns with a white flame, white solid produced

Question 11

write an equation for the reaction of Si with oxygen

Answer 11

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

Question 12

describe what is observed for the reaction of Si with oxygen

Answer 12

Si burns with a white flame, grey solid formed

Question 13

write an equation for the reaction of P with oxygen

Answer 13

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

Question 14

describe what is observed for the reaction of P with oxygen

Answer 14

P burns with a white flame, white solid formed

Question 15

write an equation for the reaction of S with oxygen

Answer 15

S8(s)+8O2(g) = 8SO2(g)

Question 16

describe what is observed for the reaction of S with oxygen

Answer 16

S burns with a blue flame, gaseous SO2 formed, turning universal indicator red