Chem 11.1

Front 1

List the rules for writing and balancing equations

Back 1

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

Front 2

Balance
SO2 + O2 --> SO3

Back 2

2SO + O2 --> 2SO3

Front 3

Balance
Fe2O3 + H2 --> Fe + H2O

Back 3

Fe2O3 + 3H2 --> 2Fe + 3H2O

Front 4

Balance
P + O2 --> P4O10

Back 4

4P + 5O2 --> P4O10

Front 5

Balance
Al + N2 --> AlN

Back 5

2Al + N2 --> 2AlN

Front 6

Write the skeleton:
Heating copper(II) sulfide in the presence of diatomic oxygen produces pure copper and sulfur dioxide gas.

Back 6

CuS (s) + O2 (g) --heat> Cu(s) and SO2 (g)

Front 7

Write the skeleton:
When heated, baking soda (sodium hydrogen carbonate) decomposes to form the products sodium carbonate, carbon dioxide and water

Back 7

NaHCO3 --heat> Na2CO3 + CO2 and H2O

Front 8

Write and balance
iron metal and chlorine gas react to form solid iron 3 choride

Back 8

Skeleton: Fe (s) + Cl (g) --> FeCl3
Balanced: Fe (s) + 3Cl (g) --> FeCl3

Front 9

Write and Balance the following.

Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas

Back 9

Skeleton: Al2(CO3)2(s) --> Al2O3 + CO2 (g)

Balanced: Al2(CO3)2(s) --> Al203 + 3CO2 (g)

Front 10

Write and balance:

Solid magnesium reacts with aqueous silver nitrate to form solid silver and aqueous magnesium nitrate.

Back 10

Skeleton: Mg (s) + AgNO3 (aq) --> Ag (s) + Mg(NO3)2 (aq)

Balanced: Mg(s) + 2AgNO3 --> 2Ag (s) + Mg(NO3)2

Front 11

Balance

Al (s) + O2(g) --> Al2O3 (s)

Back 11

4Al(s) + 3O2(g) --> 2Al2O3(s)

Front 12

Balance

FeCl3 + NaOH --> Fe(OH)3 + NaCl

Back 12

FeCl3 + 3NaOH --> Fe(OH)3 + 3NaCl

Front 13

Balance

CS2 + Cl2 --> CCl4 + S2CL2

Back 13

CS2 + 3Cl2 --> CCl4 + S2Cl2

Front 14

Write and Balance this equation...

calcium hydroxide + sulfuric acid --> calcium sulfate + water

Back 14

Skeleton:
Ca(OH)2 + H2SO4 --> CaSO4 + H2O

Balanced:
Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O

Front 15

Balance

AgNO3 + H2S --> Ag2S + HNO3

Back 15

2AgNO3 + H2S --> Ag2S + 2HNO3

Front 16

Balance

Zn(OH)2 + H3PO4 --> Zn3(PO4)2 + H2O

Back 16

3Zn(OH)2 + 2H3PO4 --> Zn3(PO4)2 + 6H2O

Front 17

Write and Balance

hydrogen + sulfur ---> hydrogen sulfide

Back 17

H2 + S --> H2S

Front 18

Write and Balance

iron (III) chloride + calcium hydroxide --> iron (III) hydroxide + calcium chloride

Back 18

2FeCl3 + 3Ca(OH)2 --> 2Fe(OH)3 + 3CaCl2

Front 19

Write a sentence for

NH3(g)+O2(g) --pt> NO(g) + H2O(g)

Back 19

Gaseous ammonia and oxygen react in the presence of a platinum catalyst to produce nitrogen monoxide gas and water vapor.

Front 20

Write a sentence for

H2So4(aq) + BaCl2(aq) --> BaSO4(s) + HCL(aq)

Back 20

Aqueous solutions of sulfuric acid and barium chloride are mixed to produce a precipitate of barium sulfate and aqueous hydrochloric acid.

Front 21

Balance

N2O3 (g) + H2O (l) --> HNO2 (aq)

Back 21

The gas dinitrogen trioxide reacts with water to produce an aqueous solution of nitrous acid

Front 22

What is the purpose of a catalyst?

Back 22

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.

Front 23

Balance a basketball team.
Center+forward+guard-->team
C+F+G-->CF2G2

Back 23

c + 2F +2G --> CF2G2

Front 24

Balance a tricycle
frame+wheel+seat+pedal-->tricycle
F+W+S+P-->FW3SP2

Back 24

F + 3W + S +2P --> FW3SP2

Front 25

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

Back 25

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.

Front 26

Balance

PbO2 --> PbO + O2

Back 26

2PbO2 --> 2PbO + O2

Front 27

Balance

Fe(OH)3 --> Fe2O3 + H2O

Back 27

2Fe(OH)3 --> Fe2O3 + 3 H2O

Front 28

Balance

(NH4)2CO3 --> Nh3 + H2O +CO2

Back 28

(NH4)2CO3 --> 2NH3 + H2O + CO2

Front 29

Balance

NaCl + H2SO4 --> Na2SO4 + HCL

Back 29

2NaCl + H2SO4 --> Na2SO4 + 2HCl