When 1,2-diaminoethane, h2nch2ch2nh2, dissolves in water, the resulting solution is basic. write the formula of the ionic compound that is formed when 2 molar equivalents of hydrochloric acid (hcl) is added to a solution of 1,2-diaminoethane?

Because 1,2-diaminoethane is base, this compound gain protons from acid (in this example hydrochloric acid) and becaume ionic compound with positive charge (cation). 
1,2-diaminoethane is organic compound and hydrochloric acid is inorganic compound.
Balance chemical reaction: 
H₂NCH₂CH₂NH₂(aq) + 2HCl(aq) → ⁺H₃NCH₂CH₂NH₃⁺(aq) + 2Cl⁻(aq).