Question

how manu mL of 5.00 M NaOH solution are needed to prepare 750mL of a 0.150 M NaOH solution? and how many mL of water misy be added to prepare the above solution?

Answer 1

We have to prepare diluted solution of NaOH ( 0.150 M ) from stock solution of NaOH ( 5.00 M ) . We can calculate volume of stock solution required to prepare dilute solution of NaOH by using dilution formula.

We have dilution formula, C _stock V _stock = C _dilute V _dilute

V _stock = C _dilute V _dilute / C _stock

V _stock = 0.150 M 750 ml / 5.00 M

V _stock = 22.5 ml

To get 0.150 M NaOH solution , dilute 22.5 ml of 5.00 M NaOH to 750 ml by using distilled water.

Volume of water required to prepare 0.150 M NaOH solution = 750 ml - 22.5 = 727.5 ml

ANSWER : 727.5 ml water is required to add to 22.5 ml of 5.00 M NaOH solution to get 750 ml of 0.150 M NaOH solution.