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Properties of Water

  • Water is polar. The electrons are more strongly attracted to the more electronegative oxygen molecule than to the hydrogen molecule..
  • Adjacent Water molecules are held together through hydrogen bonds. This bonding is responsible for some of the properties of water.
  • Water’s special properties make it essential to life. Water is both strongly cohesive and adhesive, has a high surface tension and both high heat capacity and a high heat of evaporation.
  • Substances can be divided into either hydrophilic, meaning “water loving”, or hydrophobic, meaning “water fearing.”
  • “Like dissolves like.” For example, hydrophilic substances dissolve in hydrophilic substances.
  • Acids increase the concentration of H+ in a solution. Bases decrease the concentration of H+ in a solution.
  • The pH scale is used to describe how acidic or basic a solution is. Solutions with a lower pH are more acidic. Those with a higher pH are more basic. A solution with a pH of 7 is neutral.

Properties of Water

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AP Biology Intro