Chemistry AP
posted by Zawng .
Each response gives a pair of solutions. Which pair of solutions should conduct electrical current equally well?
1. 0.10 M NH3 and 0.10 M NH4Cl
2. 0.10 M NaNO3 and 0.10 M HNO2
3. 0.10 M HBr and 0.10 M HF
4. 0.10 M NaCl and 0.10 M NaClO4
Please help...
I would also would like to know how to solve. Thank You...

Conducting electricity EQUALLY well means both not very well, both not at all, both very well.
So look to see if the pair are nonelectrolytes, strong electrolytes, weak electrolytes.
NH3 and NH4Cl. NH3 is a weak base; NH4Cl a salt that ionizes completely so NH3 will conduct weakly and NH4Cl strongly. Not #1.
NaNO3 is ionizes 100% so strong conductor; HNO2 is a weak acid so weak conductor. Not #2.
HBr a strong acid and HF weak acid; therefore not #3
4. NaCl strong electrolyte; NaClO4 strong electrolyte so both will conduct electricity very well. I would pick #4 as the choice. 
Thank You Very Much... It help me completely understand how to get the answer... Thank You...