Author Question: What volume of 50 NaOH is needed to prepare 25 mL of 2.0 NaOH? ... (Read 136 times)

plus1 · **on:** Aug 23, 2018

What volume of 50 NaOH is needed to prepare 25 mL of 2.0 NaOH?

Question 2

You need 45 mL of a 5 aqueous solution of NaHCO3.
(a) What weight of NaHCO3 is required?
(b) How much water will you add?

ashely1112 · **Reply #1 on:** Aug 23, 2018

Answer to Question 1

(a) 25 mL x (2.0 g/100 mL) = 0.50 g
X mL x (50 g/100 mL) = 0.50 g, X = 1 mL

Answer to Question 2

(a) 45 mL (5 g/100 mL) = 2.25 g
(b) enough to make the final volume 45 mL

plus1 · **Reply 2 on:** Aug 23, 2018

YES! Correct, THANKS for helping me on my review

amcvicar

Thanks for the timely response, appreciate it