Classifying Chemical Reactions
Common Reaction Notation Reactants are always on the left hand side Products are always on the right hand side Means to yield or produce Example: Peanut Butter + Jelly + Bread PB&J Sandwitch
Combustion Reactions Burning something Combining it with oxygen CH4 + O2 CO2 + H2O
Synthesis Reactions Two or more substances combine to make one product Transfer of electrons A + B AB 2Na + Cl2 2NaCl
Decomposition Reactions One reactant breaks down into two or more substances AB A + B Usually require heat, electricity, or light H2O H2 + O2
Single Replacement Reactions One element replaces another element in a compound A + BC AC + B Cu + 2AgNO3 Cu(NO3)2 + 2Ag
Double Replacement Reactions AX + BY BX + AY Two compounds switch ions Usually form a precipitate – a solid Pb(NO3)2 (aq) + KI (aq) PbI2(s) + KNO3(aq)
BaCl2 + Na2(SO4) NaCl + Ba(SO4) Classify each reaction as synthesis, decomposition, combustion, single replacement, or double replacement H2 + O2 H2O Na + H(OH) Na(OH) + H2 HgO Hg + O2 Al + Fe2O3 Al2O3 + Fe C2H5OH + O2 H2O + CO2 H2 + N2 NH3 NH4NO2 N2 + H2O BaCl2 + Na2(SO4) NaCl + Ba(SO4)