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31 Cards in this Set

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  • Back
Does phlogiston exist?
No way Jose
Who first isolated the gas we now call oxygen?
Joesph Priestly
Give two names for the chemical Preistly decomposed to produce oxygen?
mercury (II) oxide, HgO, mercuric oxide
Give the equation for this decomposition reaction...

mercuric oxide decomposes to produce oxygen
2 HgO ---> 2 Hg + O2
Who first explained burning?
Antoine Lavosier
How do chemistsdescribe burning?
it involves a chemical combination with oxygen
Will the ashes in your fireplace that result from butning a log weigh more, less or the same as the weight of the log? Explain why.
Less because all the oxygen in the long will burn away and it would leave just carbon.
Does oxygen burn?
yes
Does oxygen support combustion?
Yea baby!!
We produce oxygen in the lab by decomposing a solution of hydrogen peroxide. Write the equation.
2 H2O2 ----> 2 H2O + O2
When we burn sulfur it seens to disappear. Why is there no residue and where did the sulfur go?
Sulfur burns to produce a gas which goes into the air
Is burning a physical or chemical change?
chemical
Is burning an endothermic or exothermic change?
exothermic
Does carbon dioxide burn?
no
Does carbon dioxide support the combustion of wood, paper, coal, etc?
No
Does carbon Dioxide support the combustion of metals such as Mg, AL, Zn?
Yes
When carbon dioxide reacts with water what acid is formed?
Carbonic acid
Starting materials in a chemical reaction
reactants
ending materials in a chemical reaction
products
the word that is used to read the arrow in an equation
yeilds
a term meaning hot, melted material
molten
a term meaning decomposition by the use of electricity
electrolisis
an insoluble solid formed during a chemical reaction
precipitate
the term usd for the numbers we insert to balance an equation
coefficients
a word meaning a gas is being released
effervasence
combustion is a word that means ______
burn
we balance equations to obey the Law of ___________
conservation of matter
a material htat is added to a reaction to speed it up but is not consumed itself.
catalyst
a reaction that gives off heat is said to be ___________
exothermic
a reaction that requires the addition of heat is said to be ___________
endothermic
our common fuels contain only the elements carbon and bydrogen and are called ___________
hydrocarbons