Writing a balanced chemical reaction

Question

An aqueous solution of be²⁺ is slightly acidic. Write a balanced chemical reaction that shows why. (Note: Be²⁺ is surrounded by four water molecules when it is in solution)

Answer 1

You just have to write a simple acid base reaction where solvent water acts as the conjugate base:

 

[Be(OH2)4]2+ + H2O --> [Be(OH)(OH2)3]+ + H3O+