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