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Question
Place the metals calcium, iron, magnesium and sodium in order of their activity with water, placing the most active first. Write the equation for each of the above metals which react with Water.
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Solution
Na Sodium 2Na + 2H2O → 2NaOH + H2
Ca Calcium Ca + 2H2O → Ca[OH]2 + H2
Mg Magnesium
Fe Iron
\[\ce{Mg +\underset{\text{(Boiling water)}}{H2O} -> MgO + H2}\]
\[\ce{3Fe + 4H2O (steam)⇌ Fe3O4 + 4H2}\]
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