Question

5. Given the following data:

Flask A with 50cm² surface area contains 100mL of water at 25^oC;

Flask B with 20cm² surface area contains 10mL of water at 55^oC.

In which flask does the water have a lower vapor pressure?

A   flask A

B flask B

C   both flasks have the same vapor pressure

12. Insoluble Bismuth Sulfide, undergoes the following reaction:    Bi₂S₃ (s) <-> 2Bi³⁺ (aq) + 3S²⁺(aq)

If y moles/liter of bismuth sulfide dissolves, the correct Ksp expression for bismuth sulfide is:

A    K_sp = [2y] [3y]         B K_sp = [y]³[ y]²            C K_sp = [2y]²[3y]³

D   K_sp = [y][y]               E   K_sp = [y][ y]³          D K_sp = [2y]³[3y]²   

G   none of the above expressions are correct

Answer 1

Dute (12 BigSg (S) 2BL Print + 3.5?aq) Genen, Birdz hay y more. I litre concentration BigS3 (8) a soled so it concentration doesnt & Bi r3 û also change, son concentration of Ч is also 2 Birds (9) 2 Bi + العم 3S 092 3y (c) uksp (29) (24) [3] 3 area (6) & Vapor pressure does not depend on turfare but rather depends on temperature And vapour pressure doreetly proportional to temperature Greates the temperature interaction betweer imoleules and higher the аро ин холия10 And vapour pressure is surface phenomenon so doesnt depend on volume i So Flask A has lower temperature. Flach A has lover vapour lizessure lower the a Teacher's Signum