Q.

How many moles of Na+ions are in 200 ml of 0.4M Na3PO4?

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a

0.05

b

0.5

c

0.008

d

0.24

answer is D.

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Detailed Solution

no. of moles Na3PO4=MV1000 =0.4×2001000 =0.08 no. of moles of Na+=3×0.08 =0.24
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