What volume of WATER MUST BE ADDED to 10.0 mL of 6.0 M NaOH to make a solution that is 0.30 M in NaOH? Assume that the volumes are additive.

Question

a. 10 mL
b. 190 mL
c. 200 mL
d. 210 mL
e. 500 mL

Answer 1

you are diluting it 20 times? Add 1 part original, 19 parts water.

Now if you want to do it the hard way:

molesacid=10ml*6M=V*.3

Volumetotal=200ml
so water added =200-10ml

Answer 2

190