Question

If 25.00 mL of 4.50 M NaOH(aq) is diluted with water to a volume of 750.0 mL, what is the molarity of the diluted NaOH(aq)?

Answer 1

we know molarity =(wt of solutex1000)/(mol wt of solutexvol of soln in ml)

initially:

4.5=$\frac{(w\times1000)}{(40\times25)}$

=4.5g

now vol of soln becomes 750 ml

so molarity becomes:

$\frac{(4.5\times1000)}{(40\times750)}$

=0.15M