Question:
Excess of $NaOH_{(aq)}$ was added to $100\, mL$ of ${ FeCl_3}$ (aq) resulting into $2.14\, g$ of ${Fe(OH)_3}$. The molarity of ${FeCl_3}$ (aq) is :
(Given molar mass of ${Fe = 56 \, g \, mol^{-1}}$ and molar mass of ${Cl = 35.5 \, g \, mol^{-1}}$)
Excess of $NaOH_{(aq)}$ was added to $100\, mL$ of ${ FeCl_3}$ (aq) resulting into $2.14\, g$ of ${Fe(OH)_3}$. The molarity of ${FeCl_3}$ (aq) is :
(Given molar mass of ${Fe = 56 \, g \, mol^{-1}}$ and molar mass of ${Cl = 35.5 \, g \, mol^{-1}}$)
Updated On: Nov 21, 2025
- $0.2\, M$
- $0.3\, M$
- $0.6\, M$
- $1.8\, M$
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The Correct Option is A
Solution and Explanation
3NaOH + FeCl $\rightarrow$ Fe (CH) + NaCl
100 ml 2.14 gm
m = ?
Moles of Fe(CH) $=\frac{2.14}{107}=2\times10^{-2}$ mol
moles FeCl $=2\times10^{-2}$ mol
$M=\frac{2\times10^{-2}}{100}\times1000=0.2$ M
100 ml 2.14 gm
m = ?
Moles of Fe(CH) $=\frac{2.14}{107}=2\times10^{-2}$ mol
moles FeCl $=2\times10^{-2}$ mol
$M=\frac{2\times10^{-2}}{100}\times1000=0.2$ M
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Chemistry is a vast subject and for understanding its significance we can take help of following points:
- Chemistry plays an important role in understanding various subjects like physics, geology and biology.
- Chemistry is a core branch of science that explains us about the various compositional properties and interaction of matter. It also helps to understand various chemical reactions.
- Chemistry is important in order to understand the behaviour of fertilizers, alkenes, acids, salts, dyes, polymers, drugs, soaps and alloys in organic and inorganic chemistry.
- Chemistry plays an important role in various fields like healthcare, industrial, research, food, and farm activities.
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Classification of Matter
There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
- Solids - have definite volume and definite shape
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(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
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