Ecuatie chimica ex 2

[tex]2K^{0}+2H^{+1} _{2}O => 2K^{+1} OH + H_{2} ^{0}[/tex]
semireactiile:
K(0) __-e-__> K(+1) oxid. (ag. red.)
H(+1) _ +e-__> H(0) red. (ag. ox.)