4318869
Description
Flashcards by Ella-mentary, updated more than 1 year ago
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Created by Ella-mentary
over 8 years ago
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| Question | Answer |
| Water molecule | A polar molecule made of: 1 oxygen atom, and 2 hydrogen atoms. |
| Polarity | Having positively and negatively charged areas because of an uneven distribution of electrons. |
| Negative pole | Area with more electrons. In water, the area around the oxygen atom. |
| Positive pole | Area with fewer electrons. Near the hydrogen atom nuclei of water molecules. |
| Hydrogen bond | A weak bond formed between polar water molecules. |
| Cohesion of water molecules is high... | ...because H-bonds make water molecules stick to each other more strongly. It causes surface tension. |
| Water has high specific heat capacity... | ...because some heat is used to break H-bonds, so more is needed to raise the temperature. |
| Water is an excellent solvent... | ...because polar water molecules can dissolve a large range of substances. |
| Water has dipolarity... | ...because water molecules contain both positive and negative charges. |
| Water is a good coolant in sweat... | ...because it can easily dissolve glucose, sodium chloride, oxygen, and many amino acids. |
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