contestada

A student added 500 mL of water to 200 mL of 0.20M NaCl solution. Which of the following is True?

A. The resulting solution has a higher molarity

B. The same number of moles of solute in both solutions is the same

C. Adding water does not affect the molarity of the solution

D. The number of moles of solvent stays the same

Respuesta :

Option B is true , the same number of moles of solute in both solution is the same.

What is Molarity?  

Molarity is the ratio of no of moles as per liter solution. It is denoted by M and SI unit is also M or moles/litre.

Molarity = no . Of moles/Volume (L)  

In this question the amount of solution is increased means the volume is increased from 500-700ml it is increased , Molarity is inversly proportional of Volume

it will decrease if volume increase. Adding water do affect the concentration of the solution. The no. Of moles of solute remains because there no increament in amount of NaCl .

Hence ,option B is more correct

to learn more about Molarity click herehttps://brainly.com/question/27931587

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