Classify as a strong, weak, or non electrolyte. FeCl2, HBr, HCN, CaCO3.
I put FeCl2 and HBr as strong, HCN as weak and CaCO3 as non.
Your classification is mostly correct.
FeCl2 (Iron(II) chloride) is a strong electrolyte because it dissociates completely into ions when dissolved in water.
HBr (Hydrobromic acid) is also a strong electrolyte because it completely ionizes into H+ and Br- ions in water.
HCN (Hydrogen cyanide) is a weak electrolyte because it only partially dissociates into H+ and CN- ions in water.
CaCO3 (Calcium carbonate) is a non-electrolyte because it does not dissociate into ions when dissolved in water. Instead, it remains as intact molecules.
So, the correct classification is:
FeCl2: Strong electrolyte
HBr: Strong electrolyte
HCN: Weak electrolyte
CaCO3: Non-electrolyte
To determine the classification of each compound as a strong, weak, or non-electrolyte, we need to consider their ability to conduct electricity in water.
A strong electrolyte completely dissociates into ions when dissolved in water, resulting in a high electrical conductivity. A weak electrolyte partially dissociates into ions, leading to a lower electrical conductivity. A non-electrolyte does not dissociate into ions and thus does not conduct electricity.
1. FeCl2 (Iron(II) chloride): Strong electrolyte
- Iron(II) chloride completely dissociates into Fe2+ (iron) and Cl- (chloride) ions when dissolved in water, resulting in a solution that conducts electricity effectively.
2. HBr (Hydrobromic acid): Strong electrolyte
- Hydrobromic acid completely ionizes into H+ (hydrogen) and Br- (bromide) ions when dissolved in water, forming a solution that conducts electricity well.
3. HCN (Hydrogen cyanide): Weak electrolyte
- Hydrogen cyanide partially ionizes into H+ (hydrogen) and CN- (cyanide) ions when dissolved in water. Although it partially dissociates, the extent of ionization is limited, resulting in lower electrical conductivity compared to strong electrolytes.
4. CaCO3 (Calcium carbonate): Non-electrolyte
- Calcium carbonate does not dissociate into ions when dissolved in water. It remains as intact molecules, which cannot conduct electricity. Therefore, it is classified as a non-electrolyte.
Your classification of FeCl2 as a strong electrolyte and HBr as a strong electrolyte is correct. However, HCN should be classified as a weak electrolyte, and CaCO3 correctly falls under the non-electrolyte category.