Cards (6)

    • 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.
    • Ions important in many biological processes.
    • Calcium ions - ca2+, nerve impulse transmissions muscle contractions. Sodium ions - Na+, nerve impulse transmissions kidney function. Potassium ions - K+, nerve impulse transmission stomatal opening. Hydrogen ions - H+, catalysis of reactions ph determination. Ammonium ions - NH4+, production of nitrate ions by bacteria.
    • 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.
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