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Water Properties

Explore the essential properties of water, such as polarity, cohesion, adhesion, and surface tension. Learn how water regulates temperature, acts as a universal solvent, and impacts kinetic energy. Discover the significance of hydrophobic vs. hydrophilic interactions and understand the concept of pH and acid precipitation.

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Water Properties

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  1. Water Properties Pre AP Biology Coach Futral

  2. Life • Water, mainly found ____________________, makes up ___________of the organisms body for all life forms on earth.

  3. Polarity • Water is a ____________________________. • Oxygen is slightly __________________ charged due to higher electronegativity– holds e’s ______ __________________ because it has more protons. • Hydrogen is slightly __________________, due to lower electronegavity- holds e’s _____________, because it has less protons. • Makes water good ______________ of electricity. • Makes it possible for water to form ___________ _________________________________________.

  4. Cohesion • Term refers to water molecules ___________ _______________________________________. • Made possible because of _______________ _________________. • Important in how water _________________ ______________________.

  5. Adhesion • Refers to water molecules ________________ ______________________________________ than water molecules. • Made possible because of _______________ ______________________.

  6. Surface Tension • The ___________________________of water molecules on the _______________ of a body of water. • Made possible because of _______________ _______________________.

  7. States of Water • Only substance on Earth to be found in _____ ____________________ naturally: __________, _________________, and __________.

  8. Temperature Regulation • Water helps regulate temperature ___________ _________________________________________. • Can act as huge “____________________” • Possible due to ______________ • It takes tremendous amounts of ____________________ ________________________________________________ at once and turn liquid water to a gas. • This helps to keep the temperature of earth ________________, because water absorbs heat and __________________________________.

  9. Kinetic Energy and Water • _____________ – This measurement is the total amount of _____________________ in a substance. • _______________________– This measurement is the ______________________________________ in a substance as the molecules move. (The faster they move… the ______________ it gets and the slower they move… the _______________ it gets.)

  10. Evaporative Cooling • Putting _______________ into water, causing the water to ____________________________________ away from the body thus providing a cooling of the organism to occur as the E leaves. • Wind increases the effect of cooling by ___________ ____________________________ away from the body. • _________________, water vapor in the air, __________________________because water can’t evaporate into the air as it is already full of water vapor.

  11. Expansion • Water condenses down to 4° Celsius; after that, the colder it gets, the ____________________________. • Life was and still is able to survive under the ___________________________that occurs at the poles and during winter.

  12. Universal Solvent • ________________– Liquid that is doing the dissolving of another substance. • ________________– Substance being dissolved in the solute. • __________________ – Substance possessing equal distribution of material. (Kool-aid is a good example.) • __________________________of water make each situation possible. • ____________________________– Water surrounding a molecule, so that the substance dissolves and disappears. • _____________________________________________and therefore water can’t grab and dissolve.

  13. Hydrophobic vs. Hydrophillic • ______________________ – “hydro” = water; “phobia” = fear • Water cannot attach itself to these substances, because it is _______________________. • Substance hates water’s polarity. • _________________________– “hydro” = water; “phillic” = love • Water ________________________to the substance, because it is polar. • Substance loves water’s polarity.

  14. _____________________ • Refers to water breaking apart into _______ (Proton) and an ________ (hydroxide Ion). • ____________– a substance that gives away H+. (Measured on a pH scale.) • Scale goes from 0 to 14. • 7 neutral • ON THE pH SCALE:<7- substance is an ACID; >7 – Substance is a BASE • ____________– a substance that gives away OH-.

  15. Fig: 3.8

  16. _______________ • A substance that can___________________in pH or pOH. • It can take on or gives off a H+ or OH- to maintain the __________________________ • _______________________. • Good example is Human Blood –The buffer is _____________________________________.

  17. Acid Precipitation • Water falling in the environment that has a pH of ___________________________. • Mainly because of ________ (Sulfur Oxide) and ________ (Nitrous Oxide) in the air to combine with water. • Both are found in __________________when burned. (Such as oil, gasoline, or diesel fuel)

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