Hydrogen part2

Question 1

H2O vs D2O viscosity

Answer 1

D2O > H2O

Question 2

H2O vs D2O dielectric constant

Answer 2

H2O > D2O

Question 3

How many water molecules are hydrogen bonded and how many are coordinated

Answer 3

1 is hydrogen bonded, 4 are coordinated

Question 4

Ice shape at diff conditions

Answer 4

Low temperature: cubic

Atmospheric pressure: Hexagonal

Question 5

SiF4 + H2O vs SiCl4 + H2O

Answer 5

SiF4 ——> Si(OH)4

SiCl4 ——> SiO2

Question 6

P4O10 + H2O —–>

Answer 6

H3PO4

Question 7

Boiling MgHCO3 vs Boiling CaHCO3

Answer 7

MgHCO3 ——> Mg(OH)2 + H2O + CO2

CaHCO3 ——-> CaCO3 + H2O + CO2

Question 8

Clark’s method reagent

Answer 8

Ca(OH)2

Question 9

Clarks method MgHCO3 vs CaHCO3

Answer 9

MgHCO3 + Ca(OH)2 ——> Mg(OH)2 + CaCO3 + H2O

CaHCO3 + Ca(OH)2 ——-> CaCO3 + H2O

Question 10

Permanent hardness cures

Answer 10

Calgons, Ion Exchange, Na2CO3

Question 11

Cation exchange resin example

Answer 11

SO3H

Question 12

Anion exchange resin example

Answer 12

RNH3+OH-

Question 13

Interstitial water example

Answer 13

BaCl2.8H2O

Question 14

Ice structure

Answer 14

Each H atom surrounded tetrahedrally by 4 O atoms

Question 15

Preparation of H2O2 using a barium compound

Answer 15

BaO2.8H2O + H2SO4 ———> BaSO4 + H2O2 + H2O

Barium peroxide

Question 16

D2O2 prep from potassium compound

Answer 16

K2S2O8 + D2O ——> D2O2 + KDSO4

Question 17

H2O2 is prepared by oxidation of

Answer 17

2 -ethylanthraquinol

Question 18

H2O2 solid phase dihedral angle vs gas phase dihedral angle

Answer 18

Gas phase angle > Solid phase angle