Answer
Verified
39.9k+ views
Hint: A certain amount of milliequivalents of $KMn{{O}_{4}}$ will titrate the same amount of milliequivalents of oxalic acid. Also, remember that the n-factor of $KMn{{O}_{4}}$ varies in acidic and basic medium.
Step-by-Step Solution:
Let us first go through the properties of Potassium Permanganate ($KMn{{O}_{4}}$) as a compound.
Potassium permanganate is an inorganic compound with the chemical formula $KMnO_4$ and composed of K+ and $MnO^{4-}$. It is a purplish-black crystalline solid that dissolves in water to give intensely pink or purple solutions.
Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, and also as a medication for dermatitis, for cleaning wounds, and general disinfection.
Having established the properties and usage of $KMn{{O}_{4}}$, let us now move on to the particulars of this question.
Now, we know that Oxalic Acid’s chemical formula is $COOH-COOH$ and due to its presence in the initial titration, the medium would thus be acidic.
However, the later titration is done against alkaline ${{H}_{2}}{{O}_{2}}$ where the medium would be alkaline in nature.
With all this information now at our disposal along with the hint, let us now proceed to the step-by-step solution:
\[\begin{align}
& Milliequivalents\text{ }of\text{ }oxalic\text{ }acid~=50\times 0.1\times 2=10 \\
& \because Initial\text{ }medium\text{ }is\text{ }acidic~(\Rightarrow n=5~for~KMnO4). \\
& \therefore ~Molarity\text{ }of~KMn{{O}_{4}}=\dfrac{N}{5}=\dfrac{\dfrac{10}{100}}{5}=0.02M \\
& In\text{ }alkaline\text{ }medium,~\text{ }n=3~for~KMn{{O}_{4}}~ \\
& Hence,\text{ }normality~=0.02\times 3~=0.06N \\
\end{align}\]
Therefore, by our calculations, we can safely conclude that the required normality of $KMn{{O}_{4}}$ is 0.06N making the answer to this question c) 0.06N.
Note: Absolute caution must be taken during the titrations of any acidic or alkaline substance, regardless of its strength, so as to avoid any form of injury or damage. Also make sure that no mistakes are made in the n- factor calculation of Potassium Permanganate w.r.t change in mediums.
Step-by-Step Solution:
Let us first go through the properties of Potassium Permanganate ($KMn{{O}_{4}}$) as a compound.
Potassium permanganate is an inorganic compound with the chemical formula $KMnO_4$ and composed of K+ and $MnO^{4-}$. It is a purplish-black crystalline solid that dissolves in water to give intensely pink or purple solutions.
Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, and also as a medication for dermatitis, for cleaning wounds, and general disinfection.
Having established the properties and usage of $KMn{{O}_{4}}$, let us now move on to the particulars of this question.
Now, we know that Oxalic Acid’s chemical formula is $COOH-COOH$ and due to its presence in the initial titration, the medium would thus be acidic.
However, the later titration is done against alkaline ${{H}_{2}}{{O}_{2}}$ where the medium would be alkaline in nature.
With all this information now at our disposal along with the hint, let us now proceed to the step-by-step solution:
\[\begin{align}
& Milliequivalents\text{ }of\text{ }oxalic\text{ }acid~=50\times 0.1\times 2=10 \\
& \because Initial\text{ }medium\text{ }is\text{ }acidic~(\Rightarrow n=5~for~KMnO4). \\
& \therefore ~Molarity\text{ }of~KMn{{O}_{4}}=\dfrac{N}{5}=\dfrac{\dfrac{10}{100}}{5}=0.02M \\
& In\text{ }alkaline\text{ }medium,~\text{ }n=3~for~KMn{{O}_{4}}~ \\
& Hence,\text{ }normality~=0.02\times 3~=0.06N \\
\end{align}\]
Therefore, by our calculations, we can safely conclude that the required normality of $KMn{{O}_{4}}$ is 0.06N making the answer to this question c) 0.06N.
Note: Absolute caution must be taken during the titrations of any acidic or alkaline substance, regardless of its strength, so as to avoid any form of injury or damage. Also make sure that no mistakes are made in the n- factor calculation of Potassium Permanganate w.r.t change in mediums.
Recently Updated Pages
silver wire has diameter 04mm and resistivity 16 times class 12 physics JEE_Main
A parallel plate capacitor has a capacitance C When class 12 physics JEE_Main
A series combination of n1 capacitors each of value class 12 physics JEE_Main
When propyne is treated with aqueous H2SO4 in presence class 12 chemistry JEE_Main
Which of the following is not true in the case of motion class 12 physics JEE_Main
The length of a potentiometer wire is 10m The distance class 12 physics JEE_MAIN
Other Pages
Explain the construction and working of a GeigerMuller class 12 physics JEE_Main
Oxidation state of S in H2S2O8 is A 6 B 7 C +8 D 0 class 12 chemistry JEE_Main
A closed organ pipe and an open organ pipe are tuned class 11 physics JEE_Main
Which of the following is a buffer solution A CH3COOH class 11 chemistry JEE_Main
The mole fraction of the solute in a 1 molal aqueous class 11 chemistry JEE_Main
The resultant of vec A and vec B is perpendicular to class 11 physics JEE_Main