12. H2O2 H2O + O2
What type of reaction is represented by the equation above?

13. For each of the following pairs, predict which element as an atom would displace the other element as an ion from a compound in aqueous solution.
(a) iron and sodium
Iron displaces sodium or
Sodium displaces iron
(b) silver and copper
Copper displaces silver or
Silver displaces copper
(c) zinc and hydrogen (in HCl)
Zinc displaces hydrogen or
Hydrogen displaces zinc

14. Potassium chlorate is a rich source of oxygen. It decomposes upon heating to produce potassium chloride and oxygen. Which of the following represents the correctly balanced equation for this reaction?
4 KClO3 4 KCl + 6 O3
2 KClO3 2 KCl + 3 O2
KClO3 KCl + O3
2 KCl + 3 O2 2 KClO3

Filed under: Potassium Rich

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