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How to Deduce the Formula of Ferric Phosphate – A Step-by-Step Guide

Understanding how to deduce the chemical formula of ferric phosphate (iron(III) phosphate) is essential for students and researchers in chemistry. This guide provides a clear, step-by-step method to derive the correct formula while optimizing for SEO visibility.

Step 1: Identify the Ions Involved
Ferric phosphate consists of two ions:
– Ferric ion (Iron III): Fe³⁺ (since “ferric” refers to iron with a +3 charge).
– Phosphate ion: PO₄³⁻ (a polyatomic ion with a -3 charge).

Step 2: Determine the Charges
The iron(III) ion carries a +3 charge, while the phosphate ion has a -3 charge. Since these charges are equal in magnitude but opposite in sign, they balance each other out in a 1:1 ratio.

Step 3: Write the Formula
Combine the ions in their simplest whole-number ratio:
– Fe³⁺ + PO₄³⁻ → FePO₄

No subscripts are needed because the charges neutralize each other directly.

Final Formula: FePO₄
The correct chemical formula for ferric phosphate is FePO₄, representing one iron(III) ion bonded to one phosphate ion.

Key Takeaways
– Ferric phosphate is an ionic compound.
– The +3 charge of iron(III) balances the -3 charge of phosphate.
– Simplest formula: FePO₄.

By following these steps, students and professionals can confidently deduce the formula of ferric phosphate for lab work or academic study.