Water is a polar molecule due to the charge distribution between the slightly positive and slightly negative oxygen atom.
Weak intermolecular force - hydrogen bond when hydrogen and oxygen in h2o of different atoms are close together - - - (lines between).
Cohesion - water molecules sticking together. Adhesion - water molecules sticking to other things. Capillary action - water sticking to the side of capillary tube.
Nitrate ions - NO3-, nitrogen supply to plants for amino acids and protein formation. Hydrogen carbonate ions - HCO3-, maintenance of blood ph. Chloride ions - cl-, cell membrane formation nucleic acid and ATP formation, bone formation. Hydroxide ions - OH-, catalysis of reactions, ph determination. Phosphate ions - Po4 3-, used to make nucleic acids and ATP.