Term
| A water molecule is a simple_____molecule and it is also_____. |
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Definition
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Term
| What prevents most liquid water molecules from escaping the surface of the liquid? |
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Definition
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Term
| What are five properties of the water molecule? |
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Definition
| high surface tension, low vapor pressure, high specific heat capacity, high heat of vaporization, and high boiling point |
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Term
| Water surface acts as a _____. |
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Definition
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Term
| The inward force that minimizes surface area of a liquid is called_____. |
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Definition
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Term
| Surface tesnion holds water in a _____shape. |
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Definition
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Term
| How can surface tension be decreased? What does this interfere with? |
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Definition
| by adding surfactant; hydrogen bonding |
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Term
| What is vapor pressure caused by? |
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Definition
| molecules escaping liquid |
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Term
| What type of systems are heterogeneous mixtures? what types are homogeneous? |
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Definition
| colloids and suspensions; solutions |
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Term
| In a suspension, are the particles bigger or smaller than the particles in a solution? |
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Definition
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Term
| How does the size of teh particles in colloids compare to those of suspensions and true solutions? |
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Definition
| they are intermediate in size |
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Term
| The dispersion can be____,_____,or____. |
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Definition
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Term
| What are two examples of a colloid? |
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Definition
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Term
| When concentrated, colloids can appear_____or_____. When very dilute they are almost_____. |
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Definition
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Term
| What is the tyndall effect? |
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Definition
| the scattering of visible light in all directions |
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Term
| What two types of systems exhibit the tyndall effect? |
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Definition
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Term
| What is the brownian motion? |
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Definition
| chatoic movement of colloidal particles |
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Term
| What causes the brownian motion? |
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Definition
| the collisions of the water molecules of the medium with the small, dispersed colloidal particles |
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Term
| All the particles in a particular colloidal system have the same_____. |
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Definition
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Term
| What must happen to hydrogen bonds before water changes from liquid to vapor? |
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Definition
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Term
| What does water's high heat of vaporization help to accomplish? |
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Definition
| helps moderate temperature in the tropic and polar regions |
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Term
| As water cools does it become more or less dense? |
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Definition
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Term
| Below 4 degrees celsius, water becomes more or less dense? |
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Definition
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Term
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Definition
| becasue ice is less dense than liquid water at zero degress celsius |
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Term
| What structure do the water molecules in ice make? |
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Definition
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Term
| Which is more closely packed: ice or liquid water? |
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Definition
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Term
| Because ice floats, ice _____water below it and it keeps water at the bottom above what temperature? |
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Definition
| insultates; zero degrees celsius |
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Term
| What is an aqueous solution? |
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Definition
| water containing dissolved substances |
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Term
| What is the solvent? What is the sollute? |
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Definition
| dissolving medium; dissolved particles |
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Term
| Solute particles can be ____or_____. |
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Definition
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Term
| _____is the process that occurs when a solute dissolves. |
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Definition
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Term
| What surrounds the solute particles? |
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Definition
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Term
| ______are compounds that conduct electric current in aqueous solutions or in the molten state. |
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Definition
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Term
| ______are compounds that do no conduct electric current in aqueous solution or the molten state. |
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Definition
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Term
| _____is a solution in which only a fraction of the solute exists as ions. |
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Definition
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Term
| ______is when almost all the solute exists as separate ions. |
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Definition
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Term
| What is water of hydration? |
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Definition
| when water is chemically combined in crysal |
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Term
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Definition
| compound that contains water of hydration |
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Term
| What happens to a hydrate when it's heated? |
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Definition
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Term
| Are the forces holding the water molecules in together in hydrate strong or not strong? |
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Definition
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Term
| What does it mean when a hydrate effloresces? |
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Definition
| it loses water to the air |
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Term
| What does it mean when a hydrate is hygroscopic? |
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Definition
| compounds remove moisture from the air |
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Term
| What is a synonym for hygroscopic? |
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Definition
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Term
| What does it mean when a hydrate is deliquescent? |
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Definition
| compounds absorb so much water from the air that they dissolve completely and form solutions |
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Term
| _____are electrolytes when melted or dissoled in water. |
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Definition
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Term
| Do solutions exhibit the tyndall effect? |
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Definition
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Term
| Do particles in a colloid settle out over time? |
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Definition
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Term
| Will ethanol, a polar comound dissolve in water? |
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Definition
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Term
| The attractions between adjacent water molecules are called_____. |
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Definition
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Term
| The attractions between adjacent water atoms are called ______. |
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Definition
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Term
| What two types of systems exhibit the tyndall effect? |
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Definition
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Term
| Non polar compounds dissolve in _____. |
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Definition
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Term
| What types of cpounds dissolve in water? |
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Definition
| polar compounds because water is polar |
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Term
| What type of compounds are polar? What types are nonpolar? |
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Definition
| ionic are polar; molecular are nonpolar |
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