Predicting Products of Chemical Reactions

Category: Education

Presentation Description

The process for predicting products of single displacement, double displacement and decomposition reactions is described. The Activity Series is introduced and its use described.


Presentation Transcript

Predicting Products:

Predicting Products Recall the general formula for the reaction Use your oxidation sheet and/or the original compounds to determine oxidation numbers Don’t forget the diatomics ! Balance the equation, if necessary.

Predicting Products Single Displacement Reactions:

Predicting Products Single Displacement Reactions Free element will only displace an element from a compound if it has a higher activity Activity - Tendancy to gain/lose electrons Use the activity series to determine if a reaction will occur Free element is higher on list, reaction occurs Free element is lower on list, reaction does not occur

Activity Series:

Activity Series Metals Lithium Potassium Calcium Sodium Magnesium Aluminum Zinc Chromium Iron Nickel Tin Lead Hydrogen Copper Mercury Silver Platinum Gold Nonmetals Fluorine Chlorine Bromine Iodine Decreasing Activity

Predicting Products Double Displacement Reactions:

Predicting Products Double Displacement Reactions Reactions usually occur in aqueous solution (dissolved in water) Some products may be soluble (will dissolve); others may be insoluble (won’t dissolve) A product that is insoluble will precipitate out of solution and fall to the bottom of the container (a  is placed after the formula in the chemical equation to signify this)

Predicting Products Decomposition Reactions:

Predicting Products Decomposition Reactions Metal carbonate  metal oxide + CO 2 Na 2 CO 3  Na 2 O + CO 2 Transition metal oxide  Transition Metal + O 2 2Cr 2 O 3  4Cr + 3O 2 Metal hydroxide  metal oxide + H 2 O Mg(OH) 2  MgO + H 2 O Metal chlorate  metal chloride + O 2 2KClO 3  2KCl + 3O 2

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