Before balancing the chemical reaction, let’s first write the chemical formula of each of the compounds involved in the reaction.
Potassium Chlorate (solid)
• Potassium is a metal from group 1A. It forms ionic compounds as K+
• Chlorate is a polyatomic anion with the formula ClO3-
• When ions combine, their charges or oxidation numbers crisscross to become subscripts
• K+ will have a subscript of 1 from ClO3- → K
• ClO3- will have a subscript of 1 from K+ → ClO3
• Subscript 1 is no longer indicated → KClO3(s)
• Heat has no chemical formula.
• It is used to drive the reaction forward.
• Since the reaction consumes heat to proceed, the reaction is endothermic.
Write a balanced chemical equation for the following and classify the reaction.
Heating solid potassium chlorate in the presence of manganese dioxide catalyst produces potassium chloride and oxygen gas.
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