Question

The ionic compounds below are not charge-balanced. Re-write each chemical formula with subscripts that correctly balance the positively- and negatively-charged ions in the compound. NOTE: Enter subscripts as regular numbers. Example: If the answer was H2O, enter it as H2O. If the answer was CO2, enter it as CO2. (a) MgF (b) RbO (c) LiS (d) CaCl (e) KP

Answer 1

a)Charge of Mg is +2 and F is -1.Therefore to balance the charge one molecule of Mg2+ and two molecule of F- is needed.That is why the ionic structure is MgF2.

b)Charge of Rb is +1 and O is -2.To balance the charge two molecule of Rb+ and one molecule of O2- is needed.Therefore,the ionic structure is Rb2O.

c)Charge of Li is +1 and S is -2.To balance the charge two molecule of Li and one molecule of S2- needed.Therefore ionic structure is Li2S.

d)Charge of Ca is 2+ and charge of Cl is -1.Therefore, balanced structure is CaCl2.

e)charge of K is +1 and charge of P is -3.Therefore balanced structure is K3P.