water Flashcards
1
Q
what is the elemental composition of water
A
hydrogen and oxygen in a 2:1 ratio (h20)
2
Q
what are the properties of water
A
- colourless
-odourless
-tasteless
- boils at 100C
-excellent solvent
-neutral pH7
-can be solid, liquid or gas
3
Q
A
3
Q
what are the biological functions of water
A
-removes waste products from the body through the kidneys as urine
-provides the minerals calcium and fluoride
-helps to regulate body temperature at 37C
-makes up 92% of blood plasma, which helps to transport nutrients, oxygen and carbon dioxide, hormones and enzymes around the body
-prevents constipation, as it makes stools soft and easy to pass
4
Q
what are the sources of water
A
- soups
-beverages, e.g. tea
-tap or bottled water
-fruit and vegetables
