Równania reakcji:

I.   $Be+2H_3{O}^{+}+2H_{2}O\to {\left[Be{\left(H_{2}O\right)}_4\right]}^{2+}+H_2\uparrow$  

II.  $Be+2O{H}^{-}+2H_{2}O\to {\left[Be{\left(OH\right)}_4\right]}^{2-}+H_2\uparrow$