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level: Water

Questions and Answers List

level questions: Water

QuestionAnswer
How does hydrogen bonding occur between water moleculesDue to the polar water molecules interacting with each other. Oxygen is more negative and hydrogen is more positive. The more negative oxygen is attracted to the more hydrogen atom in the other molecules, vice versa, therefore creating a hydrogen bond
What are polar moleculesuneven distribution of electrons
Explain the thermal stability of water- Water molecules have a high heat capacity due to the hydrogen bonds. - Many hydrogen bonds between molecules = more energy needed to break bonds - therefore, the temperature remains constant
Explain why ice is less dense- As the water cools and freezes, hydrogen bonds fix the positions of the polar molecules slightly further apart than the average distance in a liquid state. - therefore, water underneath stays liquid - insulates the water underneath from the outside temperatures - organisms are still able to move and allows nutrients to circulate
Explain how water is cohesiveMoves as one mass as molecules are attracted to each-other, therefore surface tension happens
Explain how water is a solvent- As water molecules are polar, ions are able to interact with the water molecules - this provides organisms with minerals and nutrients for growth