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Question 1

electron configuration of water

Answer 1

(1s2)sp3 hybridised , energy level is between s and p

Question 2

electronegativity

Answer 2

tendency of an atom to attract electrons

Question 3

water shape and bond angle

Answer 3

tetrahedral and 104.5, as the 2 lone pairs repel more than the bonding pairs

Question 4

hydrogen bonds in water

Answer 4

higher boiling point
higher cohesion
high heat of vaporisation
ice less dense than water
surface tension
high specific heat capacity

Question 5

heat of vaporisation

Answer 5

energy to convert 1kg of water from liquid to gas at 25 degrees

Question 6

high specific heat capacity

Answer 6

amount of heat in order to alter temp of 1g of water by 1 degree
water resists changes in temp- buffers it

Question 7

the oil drop effect

Answer 7

h2o next to non polar hydrophobic molecules cant form h bonds so are less stable, so to maximise h bonds non polar molecules cluster together

Question 8

molecular mas

Answer 8

sum of all atoms in a molecule
eg h2o
=18

Question 9

avogadros number

Answer 9

1 mole of a compound always contains 6.02x10^23

Question 10

kw equations

Answer 10

kw=[h+][OH-] / [H2O]

kw= [H+][OH-] = 10^-14