Question

A 0.25 M solution of NaCl must be diluted into a 250 mL solution (0.08 M). What volume should be taken from the original solution? *
80 mL
50 mL
100 mL
40 mL

Answer 1

Answer: 80 mL

Step - by - step explanation: MV = M'V'

• M = 0.25 Molarity
• V' = 250 mL
• M' = 0.08 Molarity
• V = x

→ 0.25x = 0.08 × 250

→ 0.25x = 20

→ x = 20/0.25

→ x = 2000/25

→ x = 80 mL

Hence your ans is 80 mL

Regards

Answer 2

Answer:

Suppose volume be x.

0.25x = 0.08 ÷ 250

0.25x = 20

x= 20/0.25

x=2000/25

x=80 ml