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Question

If 0.5 mole of BaCl2 is mixed with 0.20 mole of Na3PO4, the maximum number of Ba3(PO4)2 that can be formed is:

A
0.70
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B
0.50
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C
0.20
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D
0.10
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Solution

The correct option is D 0.10
3BaCl2+2Na3PO4Ba3(PO4)2+6NaCl

3 mol of BaCl2 reacts with 2 mole of Na3PO4 to give 1 mole of Ba3(PO4)2 and 6 mole of NaCl.

0.5 mol BaCl2 reacts wtih 0.33 mol of Na3PO4.

Here, Na3PO4 is the limiting reagent.

2molesofNa3PO41moleBa3(PO4)2

1moleofNa3PO412moleBa3(PO4)2

0.2moleofNa3PO412×0.2moleBa3(PO4)2

0.1moleBa3(PO4)2

The maximum number of mole of Ba3(PO4)2 is 0.1mole.

Hence, option D is correct.

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