Download App

Electrochemistry — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry3 Marks
Question
Calculate the electrode potential of copper electrode dipped in $0.1\ce{M CuSO_4}$ solution at $298K.$ Given that $\text{E}^{\circ}_{\text{cu}^{2}+/\text{cu}}=0.34\text{V}.$
✓

Answer

$\text{Cu}^{2+}+2\text{e}^-\xrightarrow{ \ \ \ \ \ \ }\text{Cu};\text{n}=2$
$\text{E}_{\text{Cu}^{2+}/\text{Cu}}=\text{E}^{\circ}_{\text{Cu}^{2+}/\text{Cu}}-\frac{0.059}{\text{n}}\log\frac{1}{[\text{Cu}^{2+}]}$
$\text{E}_{\text{Cu}^{2+}/\text{Cu}}=0.34-\frac{0.059}{2}\log\frac{1}{0.1}$
$\text{E}_{\text{Cu}^{2+}/\text{Cu}}=0.34-0.0295=0.3105\text{V}$

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→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

In which of the following pairs will more electric current flow and why?
(a) KCl solution $25^{\circ} C$ and KCl solution at $50^{\circ} C$.
(b) $0.2 \quad M \quad CH _3 COOH$ solution and 2 M $CH _3 COOH$ solution.
(c) $NH _4 OH$ solution at $25^{\circ} C$ and at wire at $50^{\circ} C$.
(d) Al wire at $25^{\circ} C$ and Al wire at $50^{\circ} C$.
→
Short note on: Sucrose.
→
Neeta was experimenting in the lab to study the chemical reactivity of alcohols. She carried out a dehydration reaction of propanol at $140^\circ C$ to $180^\circ C$. Different products were obtained at these two temperatures.
a. Identify the major product formed at $140^\circ C$ and the substitution mechanism followed in this case.
b. Identify the major product formed at $180^\circ C$ and the substitution mechanism followed in this case.
→
Giving a suitable example for each, explain the following:
  1. Crystal field splitting.
  2. Linkage isomerism.
  3. Ambidentate ligand.
→
Give reasons for the following$:$
  1. The transition metals generally form coloured compounds.
  2. $E^\circ$ value for $\ce{(Mn^{3+}|Mn^{2+})}$ is highly positive than that for $\ce{(Cr^{3+}|Cr^{2+})}$ couple.
  3. The chemistry of actinoids elements is not so smooth as that of the lanthanoids.
→
Indicate the steps in the preparation of:
$K_2Cr_2O_7$​​​​​​​ from chromite ore.
→
Vapour pressure of water at $20^oC$ is $17.5 \ mm \ Hg.$ Calculate the vapour pressure of water at $20^oC$ when $15 g$ of glucose $($Molar mass $=180 g \ mol^{-1})$ is dissolved in $150 g$ of water.
→
$100\ mg$ of a protein is dissolved in just enough water to make $10.0\ mL$ of solution. If this solution has an osmotic pressure of $13.3\ mm\ Hg$ at $25^\circ C,$ what is the molar mass of the protein$? (R = 0.0821\ L$ atm $mol^{–1}\ K^{–1}$ and $760\ mm\ Hg = 1\ atm.)$
→
What is meant by chelate effect?
→
How would you differentiate between $S_N1$ and $S_N2$ mechanisms of substitution reactions? Give one example of each.
→