Question

Which of the following best explains why a 0.1M Na2CO3 solution is a better conductor of electricity than a 0.1M NaCl Solution.

A. Na2CO3 has a higher molar mass than NaCl
B. Na2CO3 dissociates into more particles in solution
C. NaCl is more soluble than than Na2CO3
D. NaCl does not contain a polyatomic ion.

Answer 1

neutral molecules cannot carry electrical charges through the solution, and so no current flows. sodium carbonate is not "neutral" instead, they are within close proximity of each other to sort of "neutralize" the opposing charge on the oxygens.

Answer 2

You have Na-Cl which is a strong bond (ionic), also, keep in mind that electrolytes are usually salt based, and hence sodium carbonate is a good conductor in electrolysis.

Answer 3

A mole of Na2CO3 contains more of a total charge when in solution than NaCl, because 0.1mole of Na2CO3 contains more ions than a mole of NaCl (HINT ENDS HERE). Also, it contains a doubly charged polyatomic ion which is able to carry more charge making it better than an electrolyte (D is the incorrect answer though).

Go here and read page 362 to 363 roughly it should help you with understanding
http://www.chemeddl.org/services/moodle/textbooks/general/Chemistry/pdfs/chapter11

I have no idea what abb0t is talking about, I would just ignore it.

Answer 4

If you have any questions feel free to inquire

Answer 5

Also, abbot check out my synth for the challenge question you posted. I would like to know if I'am on the right track.

Answer 6

Mostly just read the writing at the top of page 363