Chemical Elements and Water

Question 1

Frequently in Living things

Answer 1

Carbon, Oxygen, Nitorgen, Hydrogen

Question 2

Other elements needed to be livinf

Answer 2

sulphur, phosphorus, sodium, iron , calcium

Question 3

calcium

Answer 3

bones and teeth

Question 4

phosphorus

Answer 4

cell membrane structure

Question 5

sodium

Answer 5

nerve impulse

Question 6

iron

Answer 6

haemoglobin

Question 7

sulphur

Answer 7

important element in amino acids

Question 8

draw a water molecule to show polarity and hydrogen bond

Question 9

cohesion of water

Answer 9

water sticks to other water molecules, becasue its polar, and hydrogen bonds

example of how its important: Transipiration

Question 10

transpiration

Answer 10

Cohesion of water molecules is critical in the way plants transport water through their tissues in the process

Question 11

Solvent properties of water

Answer 11

The polar water molecules are attracted to the strong ionic charges of the ions in solution.

trong enough attraction on water molecules that they form shells around the ion. Here there appears to be concentric shells of water molecules around the sodium ion.

This has the effect of isolating one ion form another which is essentially what is known as solubility

Transport and reactions: Water of course is the solvent of blood, tissue fluid and the cytoplasm. It therefore allows the transport of the soluble minerals, carbohydrates, amino acids etc that are required to be transported around the body.

Question 12

thermal properties of water

Answer 12

high specific heat capacity.Ocean example in the test