Question

1. what is the chemical formula for aluminum sulfate? also₄ al₂(so₄)₃ al₃(so4)₂ als

Explanation:

Step1: Determine the charge of aluminum ion

Aluminum (\(Al\)) has a charge of \(+3\) (\(Al^{3 + }\)).

Step2: Determine the charge of sulfate ion

Sulfate (\(SO_{4}\)) has a charge of \(- 2\) (\(SO_{4}^{2-}\)).

Step3: Use the criss - cross method

To balance the charges, we need \(2\) \(Al^{3 + }\) ions (\(2\times(+3)=+6\)) and \(3\) \(SO_{4}^{2-}\) ions (\(3\times(-2)=-6\)).

Answer:

\(Al_{2}(SO_{4})_{3}\)