Please show your work and explain why the answer you pick is correct. Thank you.
ID: 975182 • Letter: P
Question
Please show your work and explain why the answer you pick is correct. Thank you.
Which of the following statements about osmosis is True At sea level osmotic pressure is equal to I atmosphere. Because fresh water fish have higher salt concentrations compared to the water they live in, the water tends to leave the fish due to osmosis and therefore they must constantly drink water to replenish that which is lost. Water will rise into a column of high salt that has a semi permiable membrane attached and the height that the water will rise depends only on the external pressure. The act of applying urine to a stingray injury functions to accelerate healing by exploiting the osmotic properties of the urine and venom molecules. Osmosis is the movement of a solvent (water) through a semi permeable membrane into a solution of higher solute Concentration in an attempt to equalize the concentrations of solute on both sides of the membrane. The base dissociation equilibrium constant for cyanade(CNO) is 4.57 * 10^-11, What is the pK_a of cyanic acid (HCNO) 3.660 10.340 4.56 * 10^-11 7.45 1.12Explanation / Answer
10 ) answer : E
that is definition for osmosis . so it is correct
11 )
Kb of CNO- = 4.57 x 10^-11
HCNO , Ka = Kw / Kb
Ka = 1.0 x 10^-14 / 4.57 x 10^-11
Ka = 2.19 x 10^-4
pKa = -log Ka
pKa = -log (2.19 x 10^-4)
pKa = 3.660
so answer : A ) 3.660