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36 Cards in this Set
- Front
- Back
- 3rd side (hint)
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True or false 74% of the planet is covered in water
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False, is actually 76%
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True or false Each water molecule can form four bonds
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True
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Cohesion
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Very sticky or hold together
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Adhesion
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The clinging of a substance to another
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Surface tension
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A measure of how difficult it is to stretch or break the surface of a liquid, water has a very high surface tension
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Heat
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Kinetic energy , molecular motion
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Temperature
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Average heat
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True or false A calorie is the amount of heat it take the temperature of 1 g of water by 1°C
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True
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True or false Hydrogen bonds resist molecular motion heat breaks hydrogen bonds
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True
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True or false, All liquids can vaporize
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True
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Water is not a solvent true or false
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False
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Solvent
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Liquid in which a solid dissolves or become a solute
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Hydrophilic
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Water loving, dissolves in water
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Hydrophobic
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Water hating, does not dissolve in water
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Does ice expand and when is it densest
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Yes it is densest at 4°C
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Aqueous solution
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A solution where water
is the solvent |
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Hydration shell
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The sphere of water molecules around each dissolved ion
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Colloid
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A stable suspension of fine particles in a liquid
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Molecular mass
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The sum of all masses of all the atoms in a molecule
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Molarity
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The number of moles per liter of solution
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Hydrogen ion
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A single proton with a charge of 1+
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Hydroxide ion
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(OH-) , The water molecule has lost a proton, which has a charge of 1-
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Hydronium ion
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A proton that binds to water molecules
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Acid
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A substance that increases hydrogen ion concentration of a solution; Anything that donates [H+] protons in H2O
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Base
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A substance that reduces the hydrogen ion concentration of a solution; Donates [OH-], great acceptors of protons
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pH
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A solution is defined as negative logarithm of the hydrogen ion concentration; measure of H+, acidity
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Buffer
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A substance that minimizes changes in the concentration of H+ and OH- in a solution; Chemical reaction to stabilize pH
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Ocean acidification
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When CO2 dissolves sea water it reacts with the water to form a carbonic acid, which lowers the ocean pH
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Acid precipitation
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Rain snow or fog with a pH lower than 5.2
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High specific heat
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The amount of heat that must be absorbed or lost for 1g of a substance to change temperature by 1°C
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Total heat in calories
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1 cal is the amount of heat it takes 1 gram of Water by 1°C
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Concentration
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Number of molecules per volume liter
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Avogadro's number
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6.02 x 10^23
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Water dissociation
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H2O <~~> H+ + OH- ( In a tiny amount)
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H+ =10^-7 M
OH- = 10^-7 M |
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Buffers
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Chemical reaction to stabilize pH
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In a reaction H2CO3 <~~> HCO3- + H+
If pH drops reaction move left If pH increases reaction move right |
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Molarity
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1 mol per volume liter
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