An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. the solution is weakly conducting compared with a solution of nacl of the same concentration. part a which of the following substances could the unknown be: koh, nh3, hno3, kclo2, h3po3, ch3coch3 (acetone)?

H₃PO₃

Explanation:

KOH, NH₃, and KClO₂ are all basic so they must not be the unknown solute since the solution is acidic.

CH₃COCH₃ is a nonelectrolyte, which means it does not dissociate into ions when it dissolves in water. Acetone must not be the unknown since the solution is weakly conducting.

The two remaining candidate, HNO₃ and H₃PO₃ are both acids. The unknown solution does not conduct electricity as well as a solution of NaCl of the same concentration, which means that the unknown acid must not dissociate to the same extent as NaCl. Both NaCl and HNO₃ (a strong acid) dissociate 100%. Thus, the unknown solute must be H₃PO₃, which is known to be a weak acid (doesn't dissociate 100%).

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?