Homework Answers
Theory: Deybe Length in water is determined by the formula:
Deybe Length in Picometer = 304/Sqrt(C) ehere C is the concentration in mol/L for 1-1 Electrolyte.
Solution: Step 1:
NaCl is 1-1 electrolyte since it dissoaciates into 1 Na+ ion and 1 Cl- ion
NaCl --> Na+ + Cl-
Step 2: For C= 0.001 M Solution:
Deybe Length = 304/Sqrt(C) = 304/Sqrt(0.001) = 9613 pm = 9.6 nm where nm is nanometer
Step 3: Debye length in ethanol = Deybelenth in water*Sqrt[Ethanol Dielectric constant/Water Dielectric Constnat]
= 9613*Sqrt[24.5/80.1] = 5316.5 pm = 5.316 nm
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NaCl=20.9 C
KCl=20.4 C
CaCl2=20.4 C
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