Question

hey !! please answer this!!
name two metals which react violently with cold water . write any three obervations which you would make when such a metal is droped into water, how would you identify the gas involved if any ,during the reacton?

Answer 1

Potassium  and sodium

Answer 2

Answer:

a) Sodiumm and potassium

$b) \: (i) \: 2K + 2 H_{2}O = > 2KOH + H_{2} + Heat \: energy \\ \\ \: \: \: (ii) \:2Na + 2H _{2} = > 2NaOH + H_{2} + Heat \: energy$

The hydrogen gas produced during the reactions of these two metals with water immediately catches fire. Thus, these reactions are violent and exothermic.

The gas evolved during these reactions burns with a popping sound w hich confirms that the gas is hydrogen (H2).

I Hope It Will Help!

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