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Predicting Products

Predicting Products. Synthesis Combine the elements together. Check subscripts with oxidation numbers. Combine two oxide compounds into one large oxide compound. Decomposition One reactant breaks into two parts. Predicting Products. Combustion

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Predicting Products

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  1. Predicting Products • Synthesis • Combine the elements together. Check subscripts with oxidation numbers. • Combine two oxide compounds into one large oxide compound. • Decomposition • One reactant breaks into two parts.

  2. Predicting Products • Combustion • Start with a hydrocarbon and oxygen. • The products will be carbon dioxide and water. • Single Replacement • Metal replace metals. Check subscripts with oxidation numbers. • Nonmetal replace nonmetals. Check subscripts with oxidation numbers. • Need to check activity series

  3. Activity Series – Table 4, pg 281or 832 for more complete table • A series of elements that have similar properties and that are arranged in decreasing order of chemical activity • However, reaction will only occur if the more reactive material is added to a less reactive material. • A more reactive material displaces a less reactive material. • The more reactive the material, the higher on the activity series it will be.

  4. Predicting Products • Double replacement • First elements switch. Check subscripts with oxidation numbers. • Neutralization falls under this category. In the reaction, it makes the product liquid water and a soluble salt. • Need to check solubility chart

  5. Solubility Chart • Helps predicts if a doublereplacement reaction will occur. • If an insoluble product is produced, the reaction will take place. • These can come in the form of a precipitate, a gas or sometime a liquid. • This chart helps to predict if a precipitate (insoluble solid) forms

  6. 2 2 ZnO Synthesis MgF2 • Zn + O2 • F2 + Mg  • AgCl  • HgO  • C3H8 + O2 • HCl + NaOH  Synthesis 2 Ag + Cl2 Decomposition 2 2 2 Hg + O2 Decomposition 5 3 CO2 + H2O 4 Combustion NaCl + H2O Neutralization

  7. Examples – Predict if the following will occur. If they will, predict the result: • NaI + Cl2 • AuCl3 (aq) + Ag(s)  • AgNO3 (aq)+ CaCl2 (aq) • AgNO3 (aq) + NaCl (aq)  • Lead (II) nitrate + sodium chloride  Cl is higher than I  yes NaCl + I2 Ag is higher than Au  yes AgCl + Au Ag is lower than Ca  no No reaction AgCl is not soluble  yes AgCl (s) + NaNO3 (aq) PbCl2 is not soluble  yes Pb(NO3)2 (aq) + NaCl (aq)  PbCl2 (s) + NaNO3 (aq)

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