Please make the answers simple , thanks : Find the volume of the solute In the f
ID: 831522 • Letter: P
Question
Please make the answers simple , thanks :
Find the volume of the solute In the following 3.55 L of a 70.0 %v/v Isopropyl alcohol solution (rubbing alcohol) Find the mass of stock solution required to prepare the following 50.0 g of 5.0 %w/w NaCI solution from a 25.0 %w/w NaCI solution Find the morality for the following 16.0 g of AgC 2H 30 2in 1.80 Lof solution In the following pair of aqueous solutions, which would have the lower freezing point? 1.25 M(NH 4)2 C0 3 or 1.40 MCuS0 4 In the following pair of aqueous solutions, which would have the higher boiling point? 1.00MNa 2CO 3 or1 .20/WZnSO 4 23) If following pairs of aqueous solutions are separated by a semi permeable membrane, to which solution will water flow? 1.25MKN0 3 or 1.00M MgCI 2Explanation / Answer
18) 70% of 3.55L is 2.485L. So 3.55L - 2.485L = 1.065L solute
19) (50)(.05)=(x)(.25)
x=10g
20) M = (16 g / 166.91 FW) / (1.80 L) = 0.05325 or 0.05M
21) (NH4)2CO3 (because of the number of ions)
22) Na2CO3 (because of the number of ions)
23) MgCl2 (Well just remember a thumb rule that water always tries to pass from low concentrated solution to high concentrated solution.This is to achieve equilibrium between low and high concs. )