K+H2O= K+Na2O= K+O2= K+H2SO4= K+NaOH= K+CL2= K+S= K+Cu= K+HCL= K+H3PO4= K+CR2O3=

Question

K+H2O= K+Na2O= K+O2= K+H2SO4= K+NaOH= K+CL2= K+S= K+Cu= K+HCL= K+H3PO4= K+CR2O3=

Answer 1

2K + 2H2O = 2KOH + H2↑

K + O2(воздух) = KO2

2K + 3H2SO4 = 2KHSO4 + SO2↑ + 2H2O

K+NaOH = РЕАКЦИЯ НЕ ИДЕТ.

2K + Cl2 = 2KCl

2K + S = K2S

2K + 2HCl = 2KCl + H2↑