Question:
An aqueous solution of $6.3\, g$ oxalic acid dehydrate is made upto $250\, mL$. The volume of $0.1N\, NaOH$ required to completely neutralize $10 \,ml$. of this solution is
An aqueous solution of $6.3\, g$ oxalic acid dehydrate is made upto $250\, mL$. The volume of $0.1N\, NaOH$ required to completely neutralize $10 \,ml$. of this solution is
Updated On: Jun 23, 2023
- $40 \,mL$
- $20\, mL$
- $10\, mL$
- $4 \,mL$
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The Correct Option is A
Solution and Explanation
Oxalic acid dihydrate $H_2C_2O_4.2H_2O:mw=126$
It is a dibasic acid, hence equivalent weight = 63
$\Rightarrow \, \, \, \, \, \, \, \, \, \, \, \, \, Normality=\frac{6.3}{63}\times \frac{1000}{250}=0.4 N$
$\Rightarrow \, \, \, \, \, \, \, \, \, \, \, \, \, N_1V_1 =N_2V_2$
$\Rightarrow \, \, \, \, \, \, \, \, \, \, \, \, 0.1 \times V_1 =0.4 \times \, 10$
Hence, $\, \, \, \, \, \, \, \, \, \, \, \, V_1 =40 mL$
It is a dibasic acid, hence equivalent weight = 63
$\Rightarrow \, \, \, \, \, \, \, \, \, \, \, \, \, Normality=\frac{6.3}{63}\times \frac{1000}{250}=0.4 N$
$\Rightarrow \, \, \, \, \, \, \, \, \, \, \, \, \, N_1V_1 =N_2V_2$
$\Rightarrow \, \, \, \, \, \, \, \, \, \, \, \, 0.1 \times V_1 =0.4 \times \, 10$
Hence, $\, \, \, \, \, \, \, \, \, \, \, \, V_1 =40 mL$
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Chemistry is a vast subject and for understanding its significance we can take help of following points:
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- 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
- Liquids - have definite volume but not definite shape.
- Gases - have neither definite volume nor definite shape.
(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
- Pure Substances are defined as a single substance (or matter) which cannot be separated by simple physical methods. Pure substances can be further classified as (i) Elements (ii) Compounds
- Mixtures are the combination of two or more elements or compounds which are not chemically combined together and may also be present in any proportion.