Chem Quiz 2 Qtr 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Most Abundant element on Earth | Oxygen
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| 21% of Air | Oxygen
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| What percent of water is oxygen | 89%
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| What does "oxygen" mean? | acid former
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| Properties of oxygen | tasteless, odorless, colorless gas. Heavier than air. Slightly soluble in water. Can be liquified. Made solid by low temp and heavy pressure
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| Chemical properties | Reacts with many substances, forms oxides, support combustion, acts as oxidizing agents
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| WHat defines oxidation? | + of oxygen
- of hydrogen
- of electrons
+ in oxidation #
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| WHat defines reduction? | - oxygen
+hydrogen
+ electrons
- oxidation #
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| WHat is the substance oxidized in a redox reaction | reducing agent
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| WHat is the simplest reducing agent? | Hydrogen
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| Three allotropic forms of oxygen | O3, O2, O
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| What is the most abundant element in the Universe? | Hydrogen
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| T or F There is a lot of free hydrogen | False
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| Physical properties of hydron | Colorless, odorless, tasteless gas. Lightest gas, slightly soluble in water
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| Chemical properties of hydrogen | Burns hot with a blue flame forming water. Does not support combustion. Reducing agent
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| WHat is the most abundant compound? | Water
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| How much of the Earth is covered in water? | 75%
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| WHat cells have water? | Animal, plant, bacteria
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| To what degree is water bent? | 105
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| WHat is the molecular mass of water? | 18 amu
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| Physical properties of water | Colorless tasteless liquid.
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| Freezing point of water | 0 degrees C
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| Boiling point of water | 100 degrees C
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| Heat of fusion of water | 80 c/g
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| Heat of vaporization | 540 c/g
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| WHat is hydrogen bonding? | Intermolecular force cause by the attraction of one water molecule's H atom to another water molecule's Oxygen atom
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| WHat is surface tension? | force that cause the surface of a liquid to contract
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| What are the embalming implications of surface tension? | Occurs at the interface of solutions an cell membranes. Can interfere with diffusion of chemicals from capillaries to tissues. This is alleviated by surface agents. `
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| Chemical properties of water | Very stable. Reacts chemically with group I and IIA metals to liberate hydrogen gas
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| WHat does water form with some metallic oxides? | Bases
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| What does water form with some non metallic oxides? | Acids
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| WHat minerals are in hard water | Ca, Mg, Fe (II)
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| How does is effect soap | Stops cleansing action
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| WHat are two classes of of hard water? | Temorary and Permanent
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| How can you remove temporary hardwater? | Boiling and filtration
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| WHat causes temporary hard water? | bicarbonate salts of Ca and Mg
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| What causes permanent hard water? | Chlorite and and sulfate salts of Ca and Mg
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| Embalming implications of hard water | Ionized calcium aids clotting, hard water should be avoided when diluting fluid, water softeners are used in arterial fluids.
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