The chemical formula for calcium chlorite is

Options

A. `Ca(ClO_4)_2`
B. `Ca(ClO_3)_2`
C. `CaClO_2`
D. `Ca(ClO_2)_2`

Explanation

To determine the chemical formula for calcium chlorite, we can follow these steps:

### Step 1: Identify the ions involved
- Calcium ion (Ca) has a charge of +2 (Ca²⁺).
- Chlorite ion (ClO₂) has a charge of -1 (ClO₂⁻).

### Step 2: Determine the ratio of ions
- To balance the charges, we need two chlorite ions for every calcium ion because the calcium ion has a +2 charge and each chlorite ion has a -1 charge. Thus, we need two ClO₂⁻ ions to balance the +2 charge of Ca²⁺.

### Step 3: Write the chemical formula
- Combining the ions, we get the formula: Ca(ClO₂)₂. This indicates that there is one calcium ion and two chlorite ions.

### Step 4: Finalize the chemical formula
- Therefore, the chemical formula for calcium chlorite is Ca(ClO₂)₂.

### Final Answer
The chemical formula for calcium chlorite is **Ca(ClO₂)₂**.

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