identify any incorrect formulas. explain your answer.?

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identify any incorrect formulas. explain your answer.?

a.Mg2(SO4)3
b. Rb3As
c. BeCl3
d. NaF

2006-12-14 14:35:15 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

2 answers

The charges of each ion need to be balanced for a correct formula:
a Mg2+ and SO42- : as written formual is incorrect
b Rb+ and As3-: formula is correct
c Be2+ and Cl-: formula is incorrect
d Na+ and F-: formula is correct

2006-12-14 23:43:37 · answer #1 · answered by Peter B 3 · 0⤊ 0⤋

MgSO4 is the correct formula. Mg is 2+ and SO4 is 2- so no other subscripts are needed.

BeCl2 is the correct formula. Be is 2+ and Cl is 1- so the Cl requires a subscript of 2.

2006-12-14 22:52:16 · answer #2 · answered by physandchemteach 7 · 0⤊ 0⤋