Question:
The empirical formula of Calgon is
The empirical formula of Calgon is
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Calgon is sodium hexametaphosphate used in water softening. Its molecular formula is \((NaPO_3)_6\), while its empirical formula is \(NaPO_3\).
Updated On: Jun 22, 2026
- \(Na_2PO_3\)
- \(NaP_2O_3\)
- \(NaPO_3\)
- \(Na_3PO_3\)
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The Correct Option is C
Solution and Explanation
Step 1: Recall what Calgon is.
Calgon is sodium hexametaphosphate, which is commonly used for softening hard water.
Its molecular formula is:
\[ (NaPO_3)_6 \]
Step 2: Determine the empirical formula.
The empirical formula is the simplest whole number ratio of atoms present in the compound.
From the molecular formula:
\[ (NaPO_3)_6 \] The simplest repeating unit is:
\[ NaPO_3 \] Thus, the empirical formula is:
\[ NaPO_3 \]
Step 3: Match with the given options.
The correct option is:
\[ (3)\;NaPO_3 \]
Step 4: Final conclusion.
Hence, the empirical formula of Calgon is:
\[ \boxed{NaPO_3} \]
Calgon is sodium hexametaphosphate, which is commonly used for softening hard water.
Its molecular formula is:
\[ (NaPO_3)_6 \]
Step 2: Determine the empirical formula.
The empirical formula is the simplest whole number ratio of atoms present in the compound.
From the molecular formula:
\[ (NaPO_3)_6 \] The simplest repeating unit is:
\[ NaPO_3 \] Thus, the empirical formula is:
\[ NaPO_3 \]
Step 3: Match with the given options.
The correct option is:
\[ (3)\;NaPO_3 \]
Step 4: Final conclusion.
Hence, the empirical formula of Calgon is:
\[ \boxed{NaPO_3} \]
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