Tuesday, January 11, 2011

Day 2 Activity 4 1/11/11 Water?

What elements make up water?

Is water an ionic compound or a covalent compound?

What is the shape of water?

Why does water stick to itself?

Why does water not stick to or mix with oil?

1 comment:

  1. 1. The elements in water are 2 Hydrogen and 1 Oxygen.

    2. Water is a covalent bond.

    3. Water has three forms solid (ice), liquid, and gas (water vapor). Depending on the temperature the shape of water changes. When the temperature is warm ice will melt and create water, when water is surrounded in a colder temperature water turns into ice, and when water is boiled it turns into a gas.

    http://en.wikipedia.org/wiki/Water

    4. Water sticks to itself because of cohesion. "Cohesion refers to the fact that water sticks to itself very easily."

    http://science.howstuffworks.com/environmental/earth/geophysics/h2o7.htm

    5. Oil does not mix with water because they are hydrophobic. Meaning that water does not dissolve with oil based on the elements dissolving minerals. "This is the source of the saying "oil and water don't mix." Water's solvency is why the water that we use is rarely pure; it usually has several minerals dissolved in it."

    http://science.howstuffworks.com/environmental/earth/geophysics/h2o7.htm

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