UNIT 1 (topic 7&8) water and ions

Question 1

what causes a water molecule to be dipolar

Answer 1

has a negative and positive pole due to uneven electron distribution

Question 2

what does it mean if water is described as metabolite

Answer 2

used to break down complex molecules - photosynthesis

Question 3

what does it mean if water has strong cohesive properties

Answer 3

hydrogen bonds allows it to be pulled up tubes (xylem vessels) by sticking together

Question 4

what does it mean by water being polar solvent

Answer 4

readily dissolves other substances - enzymes, 02 , H2 , waste

Question 5

what does it mean if water has a high specific heat capacity

Answer 5

more heat needed as they stick together - high boiling point

Question 6

name an inorganic iron ion and its use

Answer 6

haemoglobin - transports oxygen

Question 7

name an inorganic phosphate ion

Answer 7

structure in a DNA - storage of ATP

Question 8

what is an inorganic hydrogen ion’s use

Answer 8

determines pH of solutions

Question 9

what is an inorganic sodium ion’s use

Answer 9

transports glucose and amino acids across plasma membranes