2.2 Water 0.0 / 5 ? Biology2.2 WaterInternational BaccalaureateNone Created by: tom4dui24Created on: 09-04-21 18:52 Water molecule A polar molecule made of 1 oxygen and 2 hydrogen atoms. 1 of 11 Polarity Having positively & negatively charged areas because of an uneven distribution of electrons. 2 of 11 Negative pole Area with more electrons, around the oxygen atom. 3 of 11 Positive pole Area with fewer electrons, near the hydrogen atom nuclei of water molecules. 4 of 11 Hydrogen bond A weak bond formed between polar water molecules. 5 of 11 Cohesion of water molecules is high because H-bonds make water molecules stick to each other more strongly. It causes surface tension. 6 of 11 Water has high specific heat capacity because some heat is used to break H-bonds so more is needed to raise the temperature. 7 of 11 Water is an excellent solvent because polar water molecules dissolve so many substances. 8 of 11 Water has dipolarity because water molecule contains both positve and negative charges. 9 of 11 Water is a good coolant in sweat because it has a high specific heat. 10 of 11 Water is good for transport because it can easily dissolve glucose, sodium chloride, oxygen, and many amino acids. 11 of 11
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