Which of the following are strong electrolytes?
BaCl2
AgNO3
PbI2
Pb(NO3)2
KI
I think they are all strong electrolytes. Is this correct?
PbI2 is an insoluble salt. See the solubility rules.
http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
No, not all of them are strong electrolytes. Among the given options, BaCl2, AgNO3, Pb(NO3)2, and KI are strong electrolytes, while PbI2 is a weak electrolyte.
To determine whether the given compounds are strong electrolytes, we need to understand what a strong electrolyte is. A strong electrolyte is a substance that completely dissociates into ions when it dissolves in water, resulting in a high concentration of ions in the solution.
Now, let's analyze each compound:
1. BaCl2 (barium chloride): BaCl2 is classified as a strong electrolyte because it dissociates into Ba2+ and 2Cl- ions when dissolved in water.
2. AgNO3 (silver nitrate): AgNO3 is also a strong electrolyte because it fully dissociates into Ag+ and NO3- ions when dissolved in water.
3. PbI2 (lead(II) iodide): PbI2 is insoluble in water, meaning it does not dissociate well into ions. Therefore, it is not considered a strong electrolyte.
4. Pb(NO3)2 (lead(II) nitrate): Similar to AgNO3, Pb(NO3)2 is a strong electrolyte because it completely dissociates into Pb2+ and 2NO3- ions in water.
5. KI (potassium iodide): KI is another strong electrolyte because it fully dissociates into K+ and I- ions when dissolved in water.
So, to answer your question, not all of the given compounds are strong electrolytes. Only BaCl2, AgNO3, Pb(NO3)2, and KI are strong electrolytes. PbI2 is not a strong electrolyte since it has low solubility in water and does not readily dissociate into ions.