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Question: > \(4.28g\) of NaOH is dissolved in water and the solution is made to 250 cc. what will be the molar...

4.28g4.28g of NaOH is dissolved in water and the solution is made to 250 cc. what will be the molarity of the solution?

A

0.615molL−10.615molL^{- 1}

B

0.428molL−10.428molL^{- 1}

C

0.99molL−10.99molL^{- 1}

D

0.301molL−10.301molL^{- 1}

Answer

0.428molL−10.428molL^{- 1}

Explanation

Solution

(2) : No. of moles of NaOH =4.2840=0.107= \frac{4.28}{40} = 0.107

Volume of solution = 250 cm3cm^{3}

M=nVinL=0.107250×1000=0.428molL−1M = \frac{n}{VinL} = \frac{0.107}{250} \times 1000 = 0.428molL^{- 1}