You have a concentrated stock solution of 10 M NaOH and want to use it to produce a 150 mL solution of 3 M NaOH. What volume of water and stock solutions will you measure out to make this new solution?
(a) 135 mL of water, 15 mL of NaOH stock
(b) 115 mL of water, 35 mL of NaOH stock
(c) 100 mL of water, 50 mL of NaOH stock
(d) 105 mL of water, 45 mL of NaOH stock
Answer: D