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29 Cards in this Set
- Front
- Back
List the rules for writing and balancing equations
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1.) Determine correct formulas for reactants and products 2.) Write the skeleton equation. 3.) Determine the number of atoms. Count Polys as a single unit if it appears unchanged. 4.) Balance 5) Check 6) Reduce
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Balance
SO2 + O2 --> SO3 |
2SO + O2 --> 2SO3
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Balance
Fe2O3 + H2 --> Fe + H2O |
Fe2O3 + 3H2 --> 2Fe + 3H2O
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Balance
P + O2 --> P4O10 |
4P + 5O2 --> P4O10
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Balance
Al + N2 --> AlN |
2Al + N2 --> 2AlN
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Write the skeleton:
Heating copper(II) sulfide in the presence of diatomic oxygen produces pure copper and sulfur dioxide gas. |
CuS (s) + O2 (g) --heat> Cu(s) and SO2 (g)
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Write the skeleton:
When heated, baking soda (sodium hydrogen carbonate) decomposes to form the products sodium carbonate, carbon dioxide and water |
NaHCO3 --heat> Na2CO3 + CO2 and H2O
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Write and balance
iron metal and chlorine gas react to form solid iron 3 choride |
Skeleton: Fe (s) + Cl (g) --> FeCl3
Balanced: Fe (s) + 3Cl (g) --> FeCl3 |
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Write and Balance the following.
Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas |
Skeleton: Al2(CO3)2(s) --> Al2O3 + CO2 (g)
Balanced: Al2(CO3)2(s) --> Al203 + 3CO2 (g) |
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Write and balance:
Solid magnesium reacts with aqueous silver nitrate to form solid silver and aqueous magnesium nitrate. |
Skeleton: Mg (s) + AgNO3 (aq) --> Ag (s) + Mg(NO3)2 (aq)
Balanced: Mg(s) + 2AgNO3 --> 2Ag (s) + Mg(NO3)2 |
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Balance
Al (s) + O2(g) --> Al2O3 (s) |
4Al(s) + 3O2(g) --> 2Al2O3(s)
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Balance
FeCl3 + NaOH --> Fe(OH)3 + NaCl |
FeCl3 + 3NaOH --> Fe(OH)3 + 3NaCl
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Balance
CS2 + Cl2 --> CCl4 + S2CL2 |
CS2 + 3Cl2 --> CCl4 + S2Cl2
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Write and Balance this equation...
calcium hydroxide + sulfuric acid --> calcium sulfate + water |
Skeleton:
Ca(OH)2 + H2SO4 --> CaSO4 + H2O Balanced: Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O |
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Balance
AgNO3 + H2S --> Ag2S + HNO3 |
2AgNO3 + H2S --> Ag2S + 2HNO3
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Balance
Zn(OH)2 + H3PO4 --> Zn3(PO4)2 + H2O |
3Zn(OH)2 + 2H3PO4 --> Zn3(PO4)2 + 6H2O
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Write and Balance
hydrogen + sulfur ---> hydrogen sulfide |
H2 + S --> H2S
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Write and Balance
iron (III) chloride + calcium hydroxide --> iron (III) hydroxide + calcium chloride |
2FeCl3 + 3Ca(OH)2 --> 2Fe(OH)3 + 3CaCl2
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Write a sentence for
NH3(g)+O2(g) --pt> NO(g) + H2O(g) |
Gaseous ammonia and oxygen react in the presence of a platinum catalyst to produce nitrogen monoxide gas and water vapor.
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Write a sentence for
H2So4(aq) + BaCl2(aq) --> BaSO4(s) + HCL(aq) |
Aqueous solutions of sulfuric acid and barium chloride are mixed to produce a precipitate of barium sulfate and aqueous hydrochloric acid.
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Balance
N2O3 (g) + H2O (l) --> HNO2 (aq) |
The gas dinitrogen trioxide reacts with water to produce an aqueous solution of nitrous acid
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What is the purpose of a catalyst?
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a substance that speeds up the reaction but is not used up in the reaction. a catalyst is neither a reactant or a product, so its formula is written above the arrow in the a chemical equation.
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Balance a basketball team.
Center+forward+guard-->team C+F+G-->CF2G2 |
c + 2F +2G --> CF2G2
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Balance a tricycle
frame+wheel+seat+pedal-->tricycle F+W+S+P-->FW3SP2 |
F + 3W + S +2P --> FW3SP2
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The equation for the formation of water from its elements, H2(g) + o2(g) --> H2)(l) can be "balanced" by changing the formula of the product to H2O2. Explain why this is incorrect
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Changing the formula would change chemical properties. The molecule would be different. Changing the coefficients just changes the number of molecules and is the way to balance.
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Balance
PbO2 --> PbO + O2 |
2PbO2 --> 2PbO + O2
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Balance
Fe(OH)3 --> Fe2O3 + H2O |
2Fe(OH)3 --> Fe2O3 + 3 H2O
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Balance
(NH4)2CO3 --> Nh3 + H2O +CO2 |
(NH4)2CO3 --> 2NH3 + H2O + CO2
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Balance
NaCl + H2SO4 --> Na2SO4 + HCL |
2NaCl + H2SO4 --> Na2SO4 + 2HCl
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