Water is known as the universal solvent. one reason water makes a good solvent is because it is composed of polar molecules. what makes a water molecule a polar molecule? a. the water molecule never develops a charge and is always neutral. water molecules are rod-shaped. b. the water molecule has a negative charge at cold temperatures. c. water molecules have a positive charge on one end and a negative charge on the other.

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.