Oxygen, Hydrogen, Water
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| most abundant element on earth | oxygen
🗑
|
||||
| oxygen is _____ percent the volume of atmospheric air | 21%
🗑
|
||||
| oxygen is _____ percent the mass of water | 89%
🗑
|
||||
| means "acid former" | oxygen
🗑
|
||||
| how many valence electrons does oxygen have? | 6
🗑
|
||||
| what is oxygen's oxidation number? | -2
🗑
|
||||
| 3 words to describe oxygen: | colorless, odorless, tasteless
🗑
|
||||
| T/F: Oxygen is lighter than air. | False. Oxygen is heavier than air.
🗑
|
||||
| Is oxygen soluble in water? | slightly
🗑
|
||||
| What can liquefy and solidify oxygen? (2 things) | Extreme pressure and Low temperature
🗑
|
||||
| oxygen will react with other substances very rapidly at what temperatures? | high temperatures
🗑
|
||||
| oxygen reacts with metallic and nonmetallic elements to form _____ | oxides
🗑
|
||||
| what process does oxygen support, helping other things burn? | combustion
🗑
|
||||
| considered a ______ agent | oxidizing
🗑
|
||||
| Define Oxidation (4 ways) | 1) addition of oxygen to a substance, 2) the removal of hydrogen from a substance, 3) the removal of electrons from a substance, 4) the increase in oxidation number of a substance
🗑
|
||||
| reduction is the _____ of oxidation | opposite
🗑
|
||||
| Define Reduction (4 ways) | 1) removal of oxygen from a substance, 2) addition of hydrogen to a substance, 3) addition of electrons to a substance, 4) the decrease in oxidation number of a substance
🗑
|
||||
| the substance reduced in an oxidation-reduction reaction is called the _____ agent | oxidizing
🗑
|
||||
| the simplest form of an oxidizing agent is | oxygen
🗑
|
||||
| the substance oxidized in an oxidation-reduction reaction is called the _______ agent | reducing
🗑
|
||||
| the simplest form of a reducing agent is | hydrogen
🗑
|
||||
| when an element exists in two or more different forms, each with its own physical and chemical properties | allotropic
🗑
|
||||
| Three Allotropic forms of oxygen | O (nascent oxygen), O2 (molecular oxygen), O3 (ozone)
🗑
|
||||
| the most abundant element in the universe | hydrogen
🗑
|
||||
| T/F: there is a lot of free hydrogen in the atmosphere | false, there is very little free hydrogen in the atmosphere
🗑
|
||||
| atomic mass of one atom of hydrogen | 1 amu
🗑
|
||||
| oxidation # for hydrogen | +1
🗑
|
||||
| T/F: hydrogen is lighter than air | true
🗑
|
||||
| is hydrogen soluble in water? | slightly
🗑
|
||||
| hydrogen burns with a _____, _____ flame, forming _____ | hot, blue, water
🗑
|
||||
| does hydrogen support combustion? | no
🗑
|
||||
| hydrogen acts as a ______ agent | reducing
🗑
|
||||
| means "water producer" | hydrogen
🗑
|
||||
| the most abundant compound | water
🗑
|
||||
| water covers _____ percent of the earth's surface | 75%
🗑
|
||||
| water is considered a _____ molecule, where ____ atoms of hydrogen are bonded to ____ atom of oxygen, forming a bond angle of _____ degrees | bent, 2 hydrogen, one oxygen, angle of 105 degrees
🗑
|
||||
| how are H and O bonded? | covalent
🗑
|
||||
| molecular mass of water | 18 amu
🗑
|
||||
| water freezes at | 0 degrees C
🗑
|
||||
| water boils at | 100 degrees C
🗑
|
||||
| heat of vaporization for water | 540 calories/gram
🗑
|
||||
| heat of fusion for water | 80 calories/gram
🗑
|
||||
| specific heat of water | 1 calorie/gram per degree C
🗑
|
||||
| is water a good solvent for many substances? | yes
🗑
|
||||
| an intermolecular attractive force between a hydrogen atom on one water molecule to an oxygen atom on another molecule | hydrogen bonding
🗑
|
||||
| the force that causes the surface of a liquid to contract | surface tension
🗑
|
||||
| surface tension is important to embalming because it occurs at interfaces of _____ and _______, which interferes with _____ of embalming chemicals from the capillaries to the tissues | solutions and cell membranes, interferes with the diffusion of embalming chemicals
🗑
|
||||
| to alleviate the problem of surface tension in embalming, what is introduced to most embalming fluids: (3 names) | surfactants, wetting agents, surface active agents
🗑
|
||||
| is water stable? | yes
🗑
|
||||
| water reacts with the alkali metals to liberate _____ | hydrogen
🗑
|
||||
| water reacts with metallic oxides to form ____ | bases
🗑
|
||||
| water reacts with nonmetallic oxides to form _____ | acids
🗑
|
||||
| water that contains certain minerals in solution that destroy the cleansing action of soap | hard water
🗑
|
||||
| three minerals which contribute to water hardness | calcium, magnesium, and iron (II)
🗑
|
||||
| water hardness that can be removed by boiling and filtration | temporary hardness
🗑
|
||||
| water hardness due to the presence of bicarbonate salts of Ca and Mg | temporary hardness
🗑
|
||||
| water hardness caused by the chloride and sulfate salts of Ca and Mg | permanent hardness
🗑
|
||||
| water hardness that can be removed by chemical treatment and filtration | permanent hardness
🗑
|
||||
| presence of _____ calcium in the blood is very important in the blood-clotting process | ionized
🗑
|
||||
| hard water should be avoided to dilute embalming fluid because it will cause | blood clotting
🗑
|
||||
| to reduce effect of hard water on embalming, what are added (2 names) | water-conditioning agents, anticoagulants
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
amyziolkowski
Popular Chemistry sets