water mayruna master

Question 1

why water is polar

Answer 1

unevenly distributed electrical charge
two hydrogens pushed towards each other forming a v-shaped molecule

hydrogen slightly positive ,oxygen slightly negative because electrons more concentrated at the end

water is dipole

Question 2

why water is dipole

Answer 2

charged end of a water molecule is attracted to the slightly negative ends of surrounding water molecules

Question 3

hydrogen bonding in water

Answer 3

holds water molecules together and results in many of the properties of water including being liquid at room temperature

Question 4

water - good solvent

Answer 4

ionic substances dissolve easily water
eg. nacl
cl ions attracted to neg iends of the water molecules

chord and sodium ions hydrated in aqueous solution they become surrounded by water molecules

Question 5

how is water a good solvent

Answer 5

-due to a dipole nature
-allows vital biochemical reactions to occur in cytoplasm
dissolved substances transported around organisms in animals via blood and lymph systems and in plants through xylem and phloem

Question 6

thermal properties

Answer 6

-spec heat cap of water is high
-large amount of energy required to break hydrogen bonds
-warms up and cools down slowly as large input of energy small increase in temo

Question 7

why thermal properties important in water

Answer 7

-water high bp so many orogen bonds lots energy needed to break them
-aqatic organism water does not change temp rapidly
-avoid rapid internal change in temp

Question 8

cohesion tension

Answer 8

water molecules
-force can transfer through a group of h2o molecules