How many grams of phosphoric acid $\mathrm{H_3PO_4}$ would be needed to neutralise 100 g of magnesium hydroxide (Mg(OH)2).

Question

**Options:**
- **A.** [object Object]
- **B.** [object Object]
- **C.** [object Object]
- **D.** [object Object]

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**Difficulty:** MEDIUM | **Chapter:** Mole concept | **Topic:** Basic stoichiometry, POAC, percent yield & limiting reagent

Accepted Answer

## ✅ Correct Answer: **C**

### 📖 Detailed Explanation:
This question uses volumetric analysis & stoichiometry. Convert all given quantities into moles using n = given amount/molar mass, use Avogadro's number where needed to get particles, and then compare with the options; this matches option C.

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How many grams of phosphoric acid \(\mathrm{H_3PO_4}\) would be needed to neutralise 100 g of magnesium hydroxide (Mg(OH)2).

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