Chemistry question alkalin metals?

Hello, I need help to do this question.





1. One of the akali metals reacts with oxygen to form a solid white substance. When this substance is dissolved in water, the solution gives a positive test for hydrogen peroxide, H2O2. When the solution is tested in a burner flame, a lilac-purple flame is produced.





a) What is the likely identity of the metal? (i believe it is potassium)





b) Write a balanced chemical equation for the reaction of the white substance with water





Thanks

Chemistry question alkalin metals?
a) Sodium





b) 2Na + O2 ===%26gt; Na2O2





Na2O2 + H2O ===%26gt; 2NaOH + H2O2





Sodium reacts with oxygen to produce sodium peroxide, Na2O2. Potassium reacts to produce potassium superoxide, KO2



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