Both ammonia (NH3) and phosphine (PH3) are soluble in water. Which is least soluble and why?
a) ammonia because it does not form hydrogen bonds with water molecules
b) phosphine because the P-H bonds are so strong that they cannot break to enable phosphine to hydrogen-bond with water
c) phosphine because it does not form hydrogen bonds with water molecules
d) ammonia because the N-H bonds are so strong that they cannot break to enable the ammonia to hydrogen-bond with water
Answer: c) phosphine because it does not form hydrogen bonds with water molecules