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| The study of reaction speeds is called |
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| A catalyst speeds up a chemical reaction by |
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| lowering the activation energy of the reaction. |
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| If product molecules have a lower energy than reactant molecules, the reaction is (exothermic / endothermic) |
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| The energy of a molecule is stored in its |
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| Powdered magnesium will react faster than a strip of magnesium ribbon because |
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| The powdered magnesium exposes more surface area during the reaction. |
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| A chemical reaction can be slowed down by (increasing / decreasing) temperature. |
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| A chemical that speeds up a chemical reaction is called a |
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| A biological catalyst is called a(n) |
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[image]
The activation energy of the catalyzed reaction is |
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| True / False: By speeding up a chemical reaction, you increase the amount of product produced. |
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| False. You don't make any more product; you just create the same amount of product faster. |
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| Increasing the concentration of a reactant speeds up a chemical reaction because |
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| there will be more frequent collisions between the reactants |
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| A slow-release medicine capsule controls its reaction speed by controlling (temperature/surface area/catalyst). |
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| surface area. By dissolving slowly over time, the capsule exposes a small amount of medicine for reaction each hour. |
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| By using a catalyst, you (increase/decrease/do not change) the enthalpy of reaction (ΔH). |
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do not change. See the diagram below, comparing a catalyzed to a noncatalyzed reaction.
[image] |
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The enthalpy of reaction (ΔH) in the chemical reaction below is
[image] |
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| When performing stoichiometry calculations, the coefficients of a balanced equation are interpreted as (gram/mole) ratios. |
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If 3 moles of HCl are consumed in the reaction below, how many moles of FeCl3 are produced?
___ HCl + ___ Fe2O3 → ___ FeCl3 + ___ H2O
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| 1 mole FeCl3 will be produced |
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Given the equation ___ H2O → ___ H2 + ___ O2,
how many moles of H2O would be required to produce 2.5 moles of O2? |
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Consider the equation __ CaCO3 → __ CaO + __ CO2.
If 3 moles of calcium carbonate decomposes according to the reaction above, how many grams of CO2 are produced? |
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If 146 grams of HCl are are used in the reaction
___ HCl + ___ Fe2O3 → ___ FeCl3 + ___ H2O,
how many moles of FeCl3 are produced? |
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In the reaction ___ Zn + ___ H2SO4 → ___ ZnSO4 + H2,
how many grams of H2SO4 are required to produce 1.0 gram of H2? |
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Methane undergoes a combustion reaction to produce carbon dioxide and water vapor:
___ CH4 + ___ O2 → ___ CO2 + ___ H2O
If 6600 grams of CO2 are produced, what mass of oxygen gas was required? |
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| 9600 grams of O2 was required |
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Given the reaction __ Zn + __ HCl → __ ZnCl2 + __ H2 ,
if 2 mol Zn and 5 mol HCl are allowed to react, what is the correct amount of ZnCl2 produced? |
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This is a limiting reactant problem, since amounts of both reactants are given to you.
By completing the stoichiometry, 2 mol Zn will produce 2 mol ZnCl2 and 5 mol HCl will produce 2.5 mol ZnCl2. So the correct amount is the lower amount, 2 mol ZnCl2 |
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| If amounts of both reactants are given to you in a stoichiometry problem, one of the reactants will be used up first, and we call that reactant the (excess/limiting) reactant. |
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| The starting amount of the (excess/limiting) reactant produces the correct amount of product in a chemical reaction. |
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| Can you draw out the stoichiometry roadmap? |
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