Write the chemical formula of “Calgon”.

Answer

To write the chemical formula of Calgon, follow these steps:

### Step 1: Identify the compound
Calgon is commonly known as sodium hexametaphosphate.

### Step 2: Determine the chemical formula
The chemical formula for sodium hexametaphosphate is Na6P6O18.

### Step 3: Understand its use
Calgon is used for water softening. It works by replacing calcium ions in water with sodium ions.

### Step 4: Write the final answer
The chemical formula of Calgon is Na6P6O18.

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