Question

How match water make in 0.123 N NaoH for 0.1 N NaoH

Answer 1

How much solution do you need? 500 mL? Some other number? Use the appropriate number.
500 x 0.1 = mL x 0.123.
Solve for mL of the 0.123 N NaOH and add water to make 500 mL.