Hydrogen
Hydrogen Continued/Ch. 9 Water
Water Ch. 9
More Water
Mooooore Water Ch. 9
100
Free form hydrogen is in the _____ and released during ____
What is Earth’s crust, volcanic eruptions
100
Addition of a dilute solution of hydrochloric acid and zinc is the ______ method of preparing Hydrogen
What is Laboratory
100
Heat of fusion ___ cal/gram
What is 80 calories
100
Force that causes the surface of a liquid to contract
What is Surface Tension
200
______ is homonuclear diatomic molecule, like oxygen
What is Hydrogen
200
Most abundant ___ on Earth
What is Compund
200
Heat of vaporization ____ cal/gram
What is 540 cal/gram
200
Surface tension happens because molecules are attracted ____
What is Downward toward larger body
200
Contains certain minerals in solution that destroy the cleansing actions of soaps
What is Hard Waters (calcium, magnesium, iron)
300
Colorless, odorless, tasteless gas. Lighter than air, slightly soluble, highly diffusible are ______ properties of Hydrogen
What is Physical
300
Humans are __% water
What is 70%
300
The hydrogen atom in water molecules are slightly ____, and oxygen atom slightly ___
What is Positive/Negative
300
Surface tension interferes with
What is Embalming Chemicals
300
Can be removed by boiling and is due to the presence of bicarbonate of salts of calcium and magnesium
What is Temporary Hardness
400
Burns hot blue flame (forms water), does not support combustion, acts as reducing agent are ______ properties of hydrogen
What is Chemical properties
400
Molecular mass ___ amu
What is 18 amu
400
Hydrogen and oxygen atoms are attracted to themselves and ______
What is Other water molecules
400
Surface tension reducing agents
What is Surfactants
400
Cannot be removed by boiling, rather than by addition of chemicals, caused by chloride and sulfate salts of calcium and magnesium
What is Permanent Hardness ;) oooohhhhh yea
500
Commercial preparation of hydrogen
What is Electrolysis
500
Colorless, odorless, tasteless. Very good solvent for many substances are the ______ properties of water
What is Physical properties
500
This bond has ___ the strength of regular covalent bonds
What is 5%
500
Very stable, vital part of hydrolysis reactions, reacts with active metals to liberate hydrogen are _____ properties of water
What is Chemical properties
500
Both blood and hard water contain
What is Ionized calcium salts
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