water- lqc 4

Question 1

why is water a dipole molecule?

Answer 1

A water molecule has an unevenly distributed electrical charge (giving a slightly positive charge on each hydrogen and a slightly negative charge on the oxygen)

Question 2

properties of water

Answer 2

-Water is a good solvent - ions and polar molecules can dissolve in it.
-Water hasa high boiling point which means it can flow, allowing mass flow/transport in blood and the plant xylem.
-Water has a high specific heat capacity.

Question 3

define specific heat capacity

Answer 3

The energy needed to raise the temperature of 1 gram (1cm3) of a substance by 1c

Question 4

define solvent

Answer 4

liquid that many substances can dissolve in

Question 5

define hydrophobic

Answer 5

Water-repelling (non-polar molecules which do not dissolve in water)

Question 6

define hydrophilic

Answer 6

Water–attracting (polar molecules/ions which dissolve in water – water surrounds them)