Question

A semipermeable membrane separates two aqueous solutions at 20 degree C. For each of the following cases, name the solution into which a net flow of water (if any) will occur. Assume 100% dissociation for electrolytes.

Answer 1

Net flow is toward solution A Net flow is toward solution B No net flow solution A: 0.10 M CaCl2(aq) solution A: 0.10 M NaCI(aq) solution B: 0.50 M CaCl2 aq) solution B: 0.10 M KBr solution A: 0.10 M Al(NO3)3(aq) solution B: 0.20 M NaNO3(aq) solution A: 0.10 M NaCl(a) solution A: 0.10 M AI(NO3)3(aq) solution A: 0.10 M CaCl2(aq) solution B: 0.10 M KBr(a NaCl gives 2 ions KBr gives 2 ions solution B: 0.20 M NaNO3(aq) solution B: 0.50 M CaCl2(aq) AI(NO3)3 gives 4 ions clearly water will NaNO3 gives 2 ions move to one with higher concentration of CaCI2 for A, concetration of ions 2 0.10 0.20 M for A, concetration of ions 4 0.10 0.40 M for B, concetration of ions 2 0.20 0.40 M Since both are equal No net flow for B, concetration of ions 2 0.10 0.20 M Since both are equal. No net flow