Redox Reactions And Electrochemistry Ques 346
Question: The equivalent conductances of two strong electrolytes a infinite dilution in $ H_2O $ (where ions move freely througl a solution) at $ 25{}^\circ C $ are given below $ {{\Lambda }^{o}} _{CH_3COONa}=91.0Scm^{2}\text{/},Eq $ $ {{\Lambda }^{o}} _{HCl}=426.2Scm^{2}\text{/},Eq $ What additional information/ quantity one needs to calculate $ \Lambda {}^\circ $ of an aqueous solution of aceti acid-
Options:
A) $ \Lambda {}^\circ $ of $ NaCl $
B) $ \Lambda {}^\circ $ of $ CH_3 $ COOK
C) The limiting equivalent conductance of $ {H^{+}}(\lambda _{{H^{+}}}^{\circ }) $
D) $ \Lambda {}^\circ $ of chloroaceti cacid (Cl $ CH_2 $ COOH)
Show Answer
Answer:
Correct Answer: A
Solution:
[a] From Kohlraush-s law, $ {{\Lambda }^{o}} _{CH_3COOH}={{\Lambda }^{o}} _{CH_3COONa}+{{\Lambda }^{o}} _{HCl}-{{\Lambda }^{o}} _{NaCl} $
