Concept explainers
Interpretation:
The number grams of Zn (PO4)2 can be made with 26.5 g of Zn (NO3)2 and 19.7 g of Na3PO4, needs to be identified.
Concept introduction:
The limiting reagents are also known as limiting reactants, in which the compounds from the reactant are completely consumed during the reaction.
Answer to Problem 19STP
The correct answer is (b).
Explanation of Solution
The given reaction is as follows:
Amount of Na3PO4 = 19.7 g
Here, 2 mol of Na3(PO4)2 required 3 mol of Zn (NO3)2 thus 0.12 mol of Na3(PO4)2 required:
So, the limiting reagent is Zn (NO3)2.
3 moles of Zn (NO3)2produces 1 mole of Zn3(PO4)2:
So, the mass of Zn3(PO4)2 =
=
Thus, the correct answer is (b).
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