Notice that "SO4" appears in two different places in this chemical equation. SO42− is a polyatomic ion called "sulfate." What number should be placed in front of CaSO4 to give the same total number of sulfate ions on each side of the equation? ?CaSO4+AlCl3→CaCl2+Al2(SO4)3

Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.

The given unbalanced chemical reaction is,

[tex]CaSO_4+AlCl_3\rightarrow CaCl_2+Al_2(SO_4)_3[/tex]

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of chloride and sulfate ion are not balanced.

In order to balanced the chemical reaction, the coefficient 3 is put before the [tex]CuSO_4[/tex], the coefficient 2 is put before the [tex]AlCl_3[/tex] and the coefficient 3 is put before the [tex]CaCl_2[/tex].

Thus, the balanced chemical reaction will be,

[tex]3CaSO_4+2AlCl_3\rightarrow 3CaCl_2+Al_2(SO_4)_3[/tex]

Therefore, the number placed in front of [tex]CuSO_4[/tex] should be, three (3).

adioabiola adioabiola · Answer 2 · 2021-11-09T16:55:57+01:00

The number which should be placed in front of CaSO4 to give the same total number of sulfate ions on each side of the equation is; 3.

According to the question;

We are required to determine what number should be placed in front of CaSO4 to give the same number of each side of the equation.

The equation given is;

?CaSO4 + AlCl3 → CaCl2 + Al2(SO4)3

There are 3 moles of SO4 on the right hand side of the equation and as such, there should be the same number of SO4 on the left too.

In essence, the number that should be added in front of CaSO4 is; 3.