Predicting precipitation reactions. Ionic reactions of two solutions are double replacement reactions  We will talk about this more shortly.  The ions.

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Presentation transcript:

Predicting precipitation reactions

Ionic reactions of two solutions are double replacement reactions  We will talk about this more shortly.  The ions switch partners in a double replacement reaction.  Ba(ClO 3 ) 2 + Ag 2 SO 4  BaSO 4 + AgClO 3  barium chlorate + silver I sulfate  barium sulfate + silver I chlorate  (we are not balancing yet)

Example  Calcium Nitrate and Potassium Phosphate  Ca(NO 3 ) 2 + K 3 PO 4  ?  It helps to say the names of the ionic compounds  Switch partners  Calcium Phosphate and Potassium Nitrate  Ca 3 (PO 4 ) 2 + KNO 3  Ca(NO 3 ) 2 + K 3 PO 4  Ca 3 (PO 4 ) 2 + KNO 3

Net Ionic Equation  Ca(NO 3 ) 2 + K 3 PO 4  Ca 3 (PO 4 ) 2 + KNO 3  This is the full molecular equation.  Write the net ionic equation for this reaction  3 Ca PO 4 3-  Ca 3 (PO 4 ) 2

DO NOT!!!!!  It helps to say the name of the compound because you have to write the appropriate ionic formula.  A common mistake is to try and carry the subscript over from the reactant side  Ca(NO 3 ) 2 + K 3 PO 4   Ca PO 4 + K 3 (NO 3 ) 2  The charges don’t cancel out!!!!!

Predict the full molecular and net ionic equation between  Copper II acetate and lithium sulfite  Ammonium oxalate and cobalt II chloride  Aluminum nitrate and sodium carbonate  Hydrochloric acid and silver I nitrate