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JEE Main 202126 AugustEvening Shift
Exam
JEE Main
Year
2021
Date
26 August
Shift
Evening Shift
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JEE Main 2021 · 26 August · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

100mL of Na _ 3 PO _ 4 solution contains 3 . 45g of sodium. The...

100mL100mL of Na3PO4{Na}_{3}{PO}_{4} solution contains 3.45g3 . 45g of sodium. The molarity of the solution is .....×10−2molL−1\times {10}^{- 2}mol{L}^{- 1}. (Nearest integer)
[Atomic Masses - Na:23.0u,O:16.0u,P:31.0u]Na: 23 . 0u, O: 16 . 0u, P: 31 . 0u ]

Correct answer

0

Step-by-step solution

Number of mole of Na+{Na}^{+} ion =3.4523mol= \dfrac{3 . 45}{23}mol

So number of mole of Na3PO4=3.453×23=0.050mol{Na}_{3}{PO}_{4} = \dfrac{3 . 45}{3 \times 23} = 0 . 050mol

Molarity =0.050100×1000=0.50=50×10−2M= \dfrac{0 . 050}{100} \times 1000 = 0 . 50 = 50 \times {10}^{- 2}M

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