Problem: Both ammonia and phosphine (PH3) are soluble in water. Which is least soluble and why? 1. ammonia; it does not form hydrogen bonds with water molecules. 2. phosphine; the P−H bonds are so strong that they cannot break to enable phosphine to hydrogen-bond with water. 3. ammonia; it is too small to be hydrated by water molecules. 4. ammonia; the N−H bonds are so strong that they cannot break to enable the ammonia to hydrogen-bond with water. 5. phosphine; it does not form hydrogen bonds with water molecules. 

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Both ammonia and phosphine (PH3) are soluble in water. Which is least soluble and why?

1. ammonia; it does not form hydrogen bonds with water molecules.

2. phosphine; the P−H bonds are so strong that they cannot break to enable phosphine to hydrogen-bond with water.

3. ammonia; it is too small to be hydrated by water molecules.

4. ammonia; the N−H bonds are so strong that they cannot break to enable the ammonia to hydrogen-bond with water.

5. phosphine; it does not form hydrogen bonds with water molecules. 

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