Some Basic Concepts Of Chemistry Question 248

Question: The amount of water that should be added to 500 ml of 0.5 N solution of NaOH to give a concentration of 10 mg per ml is

Options:

A) 100

B) 200

C) 250

D) 500

Show Answer

Answer:

Correct Answer: D

Solution:

N1=0.5N10mg per mL

N2=10×103gm40×1×1000 =0.25N V1=500ml , V2=?

N1V1=N2V2 ; 0.5×500=0.25×V2

V2=1000mL final volume water added = 1000 ­? 500 = 500mL.



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