Download App

Electrochemistry — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry3 Marks
Question
Given that $\Lambda^{0}_{\text{m}}(\text{HCl})=426\text{ S cm}^2\text{mol}^{-1},\Lambda^{0}_{\text{m}}(\text{NaCl})\\=126\text{ S cm}^2\text{mol}^{-1}$
$\Lambda^{0}_{\text{m}}(\text{CH}_3\text{COONa})=91\text{ S cm}^2\text{mol}^{-1}$
✓

Answer

$\Lambda^{0}_{\text{m}}(\text{CH}_3\text{COOH})=\Lambda^{0}_{\text{CH}_3\text{COO}^-}+\Lambda^{0}_{\text{H}^+}$
$=\Lambda^{0}_{\text{CH}_3\text{COO}^-}=\Lambda^{0}_{\text{Na}^{+}}+\Lambda^{0}_{\text{H}^{+}}+\Lambda^{0}_{\text{Cl}^{-}}-\Big(\Lambda^{0}_{\text{Na}^{+}}+\Lambda^{0}_{\text{Cl}^{-}}\Big)$
$=\Lambda^{0}_{\text{m(CH}_3\text{COONa})}+\Lambda^{0}_{\text{m(HCl})}-\Lambda^{0}_{\text{m(NaCl})}$
$=(91+426+126)\text{S cm}^2\text{mol}^{-1}$
$=391\text{ S cm}^2\text{mol}^{-1}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Electrochemistry→Electrochemistry — all question types→Chemistry STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

An organic compound 'X', does not undergo aldol condensation. However 'X' with compound 'Y' in the presence of a strong base react to give the compound 1,3-diphenylprop-2-en-1-one.
a. Identify 'X' and 'Y'
b. Write the chemical reaction involved.
c. Give one chemical test to distinguish between X and Y.
→
Observe the graph in diagram and answer the following questions.

  1. If slope is equal to -2.0 × 10-6 sec-1 , what will be the value of rate constant?
  2. How does the half-life of zero order reaction relate to its rate constant?
→
Give the major products that are formed by heating each of the following ethers with HI.
Image
→
Write the structure of the product when chlorobenzene is treated with methyl chloride in the presence of sodium metal and dry ether.
→
The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume:
SO2Cl2(g)$\rightarrow$SO2(g) + Cl2(g)
Experiment
Time/s-1
Total pressure/atm
1
2
0
100
0.4
0.7
Calculate the rate constant.
(Given: log4 = 0.6021, log2 = 0.3010)
→
How the following conversions can be carried out?
Ethanol to But-2-yne.
→

Give the IUPAC name of the following organic compounds:

  1. $\text{(CH}_3)_2\text{C}=\text{CH}-\text{C}-\text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ||\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{O}$

  2.  

  1. $\text{CH}_3\text{CH}\text{(Br)}\text{CH}_2\text{CONHCH}_3$

→
Write chemical reaction to affect the following transformation.
(iii) Benzaldehyde to m-nitro benzaldehyde
→
Discuss the classification of monohydric alcohols containing Csp3-OH bond.
→
Explain the acidic nature of alcohols and phenols by their reaction with metals. ### 'Alcohols and phenols are acidic in nature' verify the truth of this statement by a reaction with metals.
→