writing equations review

WRITING EQUATIONS REVIEW

• In a combustion reaction, one of the reactants is always

• Oxygen Gas (O2)

• In a combustion reaction, one of the products is always

• Water (H2O)

• In every balanced chemical equation, each side of the equation has the same number of _______ of each element.

• ATOMS

• H2O(l) O2(g) + H2(g)

• 2 __ + 2

• Decomposition

• Mg(s) + N2(g) Mg3N2(s)

• 3 + __ __

• Synthesis

• Fe(s) + Cl2(g) FeCl3(s)

• 2 + 3 2

• Synthesis

• Al(s) + O2(g) Al2O3(s)

• 4 + 3 2

• Synthesis

• CaCO3(s) CaO(s) + CO2(g)

• ALREADY BALANCED!

• Decomposition

• NaCl(l) Na(s) + Cl2(g)

• 2 2 + __

• Decomposition

• FeCl2(aq) + Na3PO4(s)

Fe3(PO4)2(s) + NaCl(aq)

• 3 + 2 __ + 6

• Double Replacement

• K (s) + Cl2(g) KCl(s)

• 2 + __ 2

• Synthesis

• HCl(aq) + Ca(OH)2(s) CaCl2(aq) + H2O(l)

• 2 + __ __ + 2

• Double Replacement

• KClO3(s) KCl (s) + O2(g)

• 2 2 + 3

• Decomposition

• AgNO3(aq) + AlCl3(aq) AgCl(s) + Al(NO3)3(aq)

• 3 + __ 3 + __

• Double Replacement

• Na(s) + H2O(l)

NaOH(aq) + H2(g)

• 2 + 2 2 + __

• Single Replacement

• Fe(s) + CuSO4(aq) FeSO4(aq) + Cu(s)

• ALREADY BALANCED!

• Single Replacement

• LiCN(aq) + BaCl2(aq) LiCl(aq) + Ba(CN)2(s)

• 2 + __ 2 + __

• Double Replacement

• NaBr(aq) + Cl2(aq) NaCl(aq) + Br2(l)

• 2 + __ 2 + __

• Single Replacement

• C2H5OH(g) + O2(g) CO2(g) + H2O(g)

• __ + 3 2 + 3

• Combustion

• Sb2S3(s) + Fe(s) Sb(s) + FeS(s)

• __ + 2 2 + 3

• Single Replacement

• C2H6(g) + O2(g) CO2(g) + H2O(g)

• 2 + 7 4 + 6

• Combustion

• C2H2(g) + O2(g) CO2(g) + H2O(g)

• 2 + 5 4 + 2

• Combustion

• CH4(g) + O2(g) CO2(g) + H2O(g)

• __ + 2 __ + 2

• Combustion

F2 Cl2 Br2 I2 H2 N2 O2

• The combustion of propane (C3H8). This is a reaction of propane with oxygen that yields carbon dioxide and water.

• C3H8 + O2 CO2 + H2O

• __ + 5 3 + 4

• COMBUSTION

F2 Cl2 Br2 I2 H2 N2 O2

• The reaction of aluminum bromide with magnesium hydroxide to form aluminum hydroxide and magnesium bromide.

• Figure out your compounds first.• Al 3+ Br – • AlBr3

• Mg 2+ OH - • Mg(OH)2

F2 Cl2 Br2 I2 H2 N2 O2

• The reaction of aluminum bromide with magnesium hydroxide to form aluminum hydroxide and magnesium bromide.

• Al 3+ OH –

• Al(OH)3

• Mg 2+ Br –

• MgBr2

F2 Cl2 Br2 I2 H2 N2 O2

• The reaction of aluminum bromide with magnesium hydroxide to form aluminum hydroxide and magnesium bromide.

• AlBr3 + Mg(OH)2 Al(OH)3 + MgBr2

• 2 + 3 2 + 3

• DOUBLE REPLACEMENT

F2 Cl2 Br2 I2 H2 N2 O2

• Potassium metal and chlorine gas combine to form potassium chloride.

• Figure out your compounds first.

• K+ Cl-

• KCl

F2 Cl2 Br2 I2 H2 N2 O2

• Potassium metal and chlorine gas combine to form potassium chloride.

• K + Cl2 KCl

• 2 + __ 2

• SYNTHESIS

F2 Cl2 Br2 I2 H2 N2 O2

• Hydrogen gas and nitrogen monoxide react to form water and nitrogen gas.

• H2 + NO H2O + N2

• 2 + 2 2 + __

• SINGLE REPLACEMENT

F2 Cl2 Br2 I2 H2 N2 O2

• The decomposition of hydrogen peroxide (H2O2) to form water and oxygen.

• H2O2 H2O + O2

• 2 2 + __

• Decomposition

• The reaction Fe(s) + O2(g) Fe2O3(s) is an example of a:

• ____________________ reaction.

•  

• Mg(s) + HCl(aq) MgCl2(aq) + H2(g)

• The above reaction is a __________________________ reaction.

• In what type of reaction is water often a product?

The reaction 2Fe + 3Cl 2FeCl is which type of reaction?

• 

•The equation 2HgO 2Hg + O2 is an example of which type of reaction?

•

• Balance the skeleton equation.

•  

• AlCl + NaOH Al(OH) + NaCl

•

•

• Balance Fe + Cl FeCl

• Do the following statements happen in all chemical reactions? (Yes or No)

• The bonds of the reactants are broken and new bonds of the products are formed. _______

• The ways in which atoms are joined together are changed. _______

• New atoms are formed as products. _______

• The starting substances are called reactants. _______

• In every balanced chemical equation, each side of the equation has the same number of _________________ of each element.

• In a combustion reaction, one of the reactants is always

________________________________

•  

• The products of a combustion reaction may include

w______________, c___________ d_____________, and

c_________________ m__________________