Two solutions, A and B, are separated by a semipermeable membrane. For each case

Question

Two solutions, A and B, are separated by a semipermeable membrane. For each case, predict whether there will be a net flow of water in one direction and, if so, which direction. A with 0.20 M NaCl and solution B with 0.15 M Na_2SO_4 B with 0.10 M K_3PO_4 and solution B with 0.40 M C_6H_12O6. Which solution has the lower freezing point? 0.25 m KCl or 0.15 m Na_3PO_4 Calculate the number of eq/L and meq/L Ca^2+ in a solution that is 1.3 Times 10^-3 M in Ca^2+ Sketch the interaction of a water molecule with a potassium ion Sketch the interaction of a water molecule with a bromide ion. What type of solute dissolves readily in water? What type of solute dissolves readily in gasoline? Blood is essentially an aqueous solution, but it must transport a variety of nonpolar substances (hormones for example). Colloidal proteins, termed albumins, facilitate this transport. Must these albumins be polar or nonpolar? Why? A solution contains 1.5 mg of Fe^3+ per 1.00 kg solution. Calculate the concentration in ppt and ppm. Label 3% (m/V) NaCl solution as isotonic, hypotonic or hypertonic in comparison to 0.9% (m/V) NaCl solution. Label 0.35 M glucose (C6H, :06) as isotonic, hypotonic or hypertonic in comparison to 0.9% (m/V) NaCl solution

Explanation / Answer

Q3.

net ion count for NaCl solution --> 2*0.2 = 0.40

net ion count for Na2SO4 solution = 3*0.14 = 0.45

therefore, the gradient goes from Na2sO4 to NaCl

Totla ions = 0.40 + 0.45 = 0.85

for

K3PO4 --> 4 ions -->4*0.1 = 0.40

for C6H12O6 -> 1 molecules = 1*0.40

no net flow, since 0.4 = 0.40

Total ions = 0.80

Q4.

KCl = 2 ions = 0.25*2 = 0.50

Na3PO4 = 4 ions = 4*0.15 = 0.60

so... Na3PO4 will ahve a higher depression, which mens lower freezing point

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