no attempt penalty 0 This is a Numeric Entry question/tis worth 1 point/You have

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no attempt penalty 0 This is a Numeric Entry question/tis worth 1 point/You have unlimited attempts/There is a See page 143 04 Question (1 point) A pudle of coastalseawater caught in a depression formed by some coastal rocks at high tide, begins to evaporate on a hot summer day as t goes out v 1st attempt l See Periodic Table See Hint If the volume of the puddle decreases to 23,0 % of its initial volume, what is the concentration of Na" after evaporation if initially it was 0.449 M 10 QUESTIONS COMPLETED-

Explanation / Answer

Dilution law: M1 x V1 = M2 x V2

Where, M1 and V1 are the molarity and volume of dilute solution

M2 and V2 are the molarity and volume of stock solution.

M2 = 0.449 M

V1 = 23.0%V2 = 0.230V2

Substitute these values in above equation.

M1 x 0.230 V2 = 0.449 M x V2

M1 = 0.449 M / 0.230 = 1.95 M

So, the concentration of Na+ after evaporation is 1.95 M.

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