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What is the molarity of sodium chloride in sea water if it contains roughly 28.0 g of NaCl per liter?

1. 0.479M
2. 0.488M
3. 0.499M
4. 0.610M

This question is part of Molarity Practice Quiz
Asked by Eddy, Last updated: Apr 01, 2020

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3 Answers

Anika Nicole

Content Writer, Teacher

Anika Nicole, Wordsmith, PG In Journalism, New York

Answered May 28, 2018

Given:Sea water contains roughly 28.0 g of NaCl per liter.

To find: What is the molarity of sodium chloride (NaCl) in sea water?

Solution:

Molecular mass of NaCl= 58.4

Therefore 1 mole of NaCl= 58.4 g

Number of moles in sea water= 28/58.4= 0.479

Therefore, 1 litre of water contains 0.479 moles of NaCl

Now, Molarity(M) = Number of moles of solute/ volume of solvent.

Therefore,

M= 0.479/1 = 0.479M

 

John Adney

John Adney

Answered Jul 17, 2017

0.4791M is the molarity that I calculated, it is correct

 

John Smith

John Smith

Answered Mar 16, 2017

0.479m

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