A student wants to prepare 1.00 L of a 1.00 M solution of NaOH (molar mass 40.00 g/mol). If solid NaOH is available, how would the student prepare this solution? If 2.00 MNaOH is avail- able, how would the student prepare the solution? To help insure three significant figures in the NaOH molarity, to how many sig- nificant figures should the volumes and mass be determined?

Explanation:

1)

Mass of NaOH = m

MOlar mass of NaOH = 40 g/mol

Volume of NaOH solution = 1.00 L

Molarity of the solution= 1.00 M

A student can prepare the solution by dissolving the 40. grams of NaOH in is small volume of water and making that whole volume of solution to volume of 1 L.

Upto two significant figures mass should be determined.

2)

(dilution equation)

Molarity of the NaOH solution =

Volume of the solution =

Molarity of the NaOH solution after dilution =

Volume of NaOH solution after dilution=

A student can prepare NaOH solution of 1.00 M by diluting the 0.500 L of 2.00 M solution of NaOH with water to 1.00 L volume.

Upto three significant figures volume should be determined.

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