Periodic Table

Question 1

Na2O +H2O

Answer 1

NaOH

Question 2

Na2O +Acid

Answer 2

NaCl

Question 3

Mg2O +H2O

Answer 3

Mg(OH)2 (aq/s)

Question 4

Al2O3 +H2O

Answer 4

Al2O3 does not dissolve in water. Energy needed to break down the ionic lattice is more than the energy released on hydrating the ions

Question 5

SiO2 +H2O

Answer 5

strong cov bonds

Question 6

P4O10 +H2O

Answer 6

H3PO4

Question 7

SO3 +H2O

Answer 7

H2SO4

Question 8

Mg2O+Acid

Answer 8

MgCl2

Question 9

Al2O3 +Acid

Answer 9

AlCl3 (aq)

Question 10

Al2O3 +Base

Answer 10

[Al(OH)4]-

Question 11

SiO2 +Base

Answer 11

[SiO3]2-

Question 12

P4O10 + Base

Answer 12

Na3PO4

Question 13

SO3 + Base

Answer 13

Na2SO4

Question 14

NaCl

Answer 14

Hydration

NaCl(s) + aq –> Na+ + Cl-

Question 15

MgCl2

Answer 15

Hydration
MgCl2 + 6H2O –> [Mg(H2O)6]2+ + 2Cl-

Slight hydrolysis
[Mg(H2O)6]2+ + H2O [Mg(OH)(H2O)5]+ + H3O+

Question 16

AlCl3

Answer 16

Hydration
AlCl3(s) + 6H2O –> [Al(H2O)6]3+ + 3Cl-

Appreciable hydrolysis
[Al(H2O)6]3+ + H2O [Al(OH)(H2O)5]2+ + H3O+

Question 17

SiCl4 Limited water

Answer 17

Hydrolysis

SiCl4(l) + 2H2O –> SiO2(s) + 4HCl (g)

Question 18

SiCl4 Excess water

Answer 18

SiCl4(l) + 4H2O –> Si(OH)4 + 4HCl (aq)

Question 19

PCl5 Excess water, not cold

Answer 19

PCl5(s) + 4H2O –> H3PO4 + 5HCl (aq)

Question 20

PCl5 Limited water/cold

Answer 20

PCl5(s) + H2O –> POCl3 (l) + 2HCl (g)

Question 21

PCl5 Excess water, cold

Answer 21

POCl3(l) + 3H2O –> H3PO4 + 3HCl(aq)

Question 22

AlCl3 A few drops of water

Answer 22

AlCl3(s) + 3H2O –> Al(OH)3 + HCl (g)