A base
we prepared by the
reaction belureen
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(gas and water i an active meta and
valer an actus nou metal and water
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The reactivity of active metals can be demonstrated by dropping pieces of Li,Na,K into water. Li reacts slowly with water, Na reacts more rapidly and K reacts violently. For a reaction between sodium and water, it can be divided into two halves. One-half reaction describes what happens when sodium atoms lose electrons. The other half describes what happens when water molecules gain these electrons. An overall equation is obtained for the reaction which shows the formation of metal hydroxide and evolution of hydrogen gas.
2Na(s)+2H
2
O(l)→2Na
+
(aq)+2OH
−
(aq)+H
2
(g)↑
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