What is the specific equivalent mass of Phosphoric acid () in the following balanced neutralization — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

Step 1: Analyze the reaction to determine the basicity (n-factor) of the acid. Phosphoric acid ($H_3PO_4$) has three replaceable acidic hydrogen atoms. Step 2: Observe the products. The product salt is $CaHPO_4$, indicating that only two of the three acidic hydrogen atoms have been replaced by the calcium cation during this specific reaction. Step 3: Calculate the equivalent weight. Since exactly 2 moles of $H^+$ were transferred per mole of $H_3PO_4$, the n-factor is 2. Equivalent Weight = Molar Mass / n-factor = $M/2$.