Are the following solutions strong, weak or non-electrolytes?

2019-02-19 3:21 pm
Are the following solutions strong, weak or non-electrolytes?
a) NaOH(aq)
b) HCl(aq)
c) C6H12O6(aq)
d) NH3(aq)
e) Ethanol in H2O

回答 (1)

2019-02-19 5:16 pm
✔ 最佳答案
a)
NaOH(aq) is a strong electrolytes.
This is because NaOH "completely" dissociates in water to give mobile ions (Na⁺ and OH⁻) which conduct electricity.
NaOH(aq) → Na⁺(aq) + OH⁻(aq)

b)
HCl(aq) is a strong electrolytes.
This is because HCl "completely" ionizes in water to give mobile ions (Cl⁻ and H₃O⁺/H⁺) which conduct electricity.
2HCl(aq) → H₃O⁺(aq) + Cl⁻(aq)
OR: HCl(aq) → H⁺(aq) + Cl⁻(aq)

c)
C₆H₁₂O₆(aq) is a non-electrolyte.
This is because C₆H₁₂O₆ entirely exists as molecules in aqueous solution, and there are no ions to conduct electricity.

d)
NH₃(aq) is a weak electrolytes.
This is because NH₃ "partially" dissociates in water to give mobile ions (NH₄⁺ and OH⁻) which conduct electricity.
NH₃(aq) + H₂O(l) ⇌ NH₄⁺(aq) and OH⁻(aq)

e)
Ethanol (C₂H₅OH(aq)) is a non-electrolyte.
This is because ethanol entirely exists as molecules in aqueous solution, and there are no ions to conduct electricity.


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