Answer to Question #205603 in Chemistry for marianna

Question #205603

What is the molarity of of 485.0g of Na2CO3 dissolved in 2.5 L of water?


1
Expert's answer
2021-06-11T22:49:23-0400

Solution:

The molar mass of Na2CO3 is 106 g/mol.

Therefore,

(485.0 g Na2CO3) × (1 mol Na2CO3 / 106 g Na2CO3) = 4.575 mol Na2CO3


Molarity = Moles of solute / Volume of solution

Molarity of Na2CO3 = (4.575 mol) / (2.5 L) = 1.83 mol/L = 1.83 M

Molarity of Na2CO3 = 1.83 M


Answer: 1.83 M is the molarity of Na2CO3.

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