How many grams of naoh (mw = 40.0) are there in 500.0 ml of a 0.225 m naoh solution?

There are 4.5 grams of NaOH in 500.0 mL of a 0.225 M NaOH solution.

HOW TO CALCULATE MASS:

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Given: Molar mass of NaOH=40 g/mol

Volume of NaOH solution=500 mL

Molarity of solution=0.225 M

Molarity of solution is defined as number of moles of solute in 1 L of solution. Thus,

Thus, to calculate the mass of NaOH, first calculate its number of moles by rearranging the above equation and putting values of volume and number of moles.

Now, number of moles are related to mass as follows:

Here, M is molar mass

Rearranging and putting the values of number of moles and molar mass thus,

Therefore, mass of NaOH in 500 mL of 0.225 M NaOH solution is 4.5 g.