Answer to Question #246085 in General Chemistry for mohamed

Question

1.00 mL of a 3.50  10–4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether,

forming solution A. Then 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether,

forming solution B. What is the concentration of solution B?

Answer 1

Total volume of solution A = (9.00+1.00) mL = 10.00 mL

According to law of dilution,

where C1 and C2are initial and final concentration respectively. V1 and V2 are initial and final volume respectively.

C1=3.55×10^-4M

V1 = 1.00 mL, V2= 10.00 mL

So, concentration of solution A =

Solution B: Total volume of solution B = (2.00+8.00) mL = 10.00 mL

Similarly as above,

Therefore the concentration of solution B= 7.10×10^-6M