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As water is being added to a concentrated NaOH solution

As water is being added to a concentrated NaOH solution

(A) the moles of solute are decreasing, and the molarity is increasing.

(B)  the moles of solute are decreasing, and the volume is increasing.

(C)  the volume of the solution is increasing, and the molarity is decreasing.

(D) the volume of the solution is increasing and the molarity is increasing.


Solution:

Molarity = moles of solute/Liters of solution

Solute = the substance that gets dissolved

Solvents= what the solute dissolves in


In our problem NaOH is the solute and water is the solvent. Adding more water will result in increased volume. Since volume is in the denominator of the molarity equation, increasing the volume results in decreased molarity. Choice C


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