gneet

Study Companion

For more NEET and AIIMS mcq on Chemical arithmetic and volumetric analysis Visit www.gneet.com
QUESTION
Q81) 250ml of a sodium carbonate solution contains 2.65g of Na2CO3. If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution? [ mol.wt of Na2CO3=106] [ EAMCET 2001]




SOLUTION

wt in 10 ml=(2.65/250)×10=0.106 g
0.106g=0.001 mole
Since 10 ml is diluted to one litre molarity=0.001 M
Answer: (b)