Question

1. write the formula for calcium arsenite. (0.5 points) enter your answer 2. name the following ion: s2- (0.5 points) enter your answer 3. name the following ion: n3- (0.5 points) * enter your answer

Explanation:

1. Write the formula for Calcium arsenite

Step1: Determine the ions

Calcium has a charge of \(Ca^{2 +}\). Arsenite ion is \(AsO_{3}^{3 -}\).

Step2: Balance the charges

To balance the charges, we need 3 \(Ca^{2+}\) ions (\(3\times2 = 6\)) and 2 \(AsO_{3}^{3 -}\) ions (\(2\times3=6\)).
The formula is \(Ca_{3}(AsO_{3})_{2}\).

2. Name the ion \(S^{2 -}\)

Step1: Recall naming rules

For monatomic anions, we change the ending of the element name to -ide.
The element is sulfur, so the ion is sulfide ion.

3. Name the ion \(N^{3 -}\)

Step1: Apply naming rules

Using the rule for monatomic anions (change element ending to -ide).
The element is nitrogen, so the ion is nitride ion.

Answer:

1. \(Ca_{3}(AsO_{3})_{2}\)
2. sulfide ion
3. nitride ion