Question:
The density of $3M$ solution of sodium chloride is $1.252\, g\, mL^{-1}$. The molality of the solution will be:
(molar mass, $NaCl = 585\, g\, mol^{-1}$)
The density of $3M$ solution of sodium chloride is $1.252\, g\, mL^{-1}$. The molality of the solution will be:
(molar mass, $NaCl = 585\, g\, mol^{-1}$)
Updated On: Jul 2, 2024
- 260 m
- 2.18 m
- 2.79 m
- 3.00 m
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
The relation between molarity (M) and molality (m) is
$d=M\left(\frac{1}{m}+\frac{M_{2}}{1000}\right), M_{2}=$ Mol. mass of solute
On putting value
$1.252=3\left(\frac{1}{m}+\frac{58.5}{1000}\right)$
on solving $m = 2.79$
$d=M\left(\frac{1}{m}+\frac{M_{2}}{1000}\right), M_{2}=$ Mol. mass of solute
On putting value
$1.252=3\left(\frac{1}{m}+\frac{58.5}{1000}\right)$
on solving $m = 2.79$
Was this answer helpful?
0
1
Top Questions on Some basic concepts of chemistry
- Identify the pair which is not correctly matched:
- AP EAPCET - 2025
- Chemistry
- Some basic concepts of chemistry
- Identify the herbicides from the following:
a) DDT b) Aldrin c) Sodium chlorate d) Nicotine e) Sodium arsenite- AP EAPCET - 2025
- Chemistry
- Some basic concepts of chemistry
Brass alloy is made of which metals?
- NATA - 2025
- Chemistry
- Some basic concepts of chemistry
- Which of the following is an extensive property?
- KEAM - 2025
- Chemistry
- Some basic concepts of chemistry
- A shell in projectile motion explodes while in motion, what is the trajectory of the center of the fragments?
- KEAM - 2025
- Chemistry
- Some basic concepts of chemistry
View More Questions
Questions Asked in JEE Main exam
Let one focus of the hyperbola $ \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 $ be at $ (\sqrt{10}, 0) $, and the corresponding directrix be $ x = \frac{\sqrt{10}}{2} $. If $ e $ and $ l $ are the eccentricity and the latus rectum respectively, then $ 9(e^2 + l) $ is equal to:
- JEE Main - 2025
- Conic sections
- The number of real solution(s) of the equation \( x^2 + 3x + 2 = \min \left( |x - 3|, |x + 2| \right) \) is:
- JEE Main - 2025
- Coordinate Geometry
- A 400 g solid cube having an edge of length \(10\) cm floats in water. How much volume of the cube is outside the water? (Given: density of water = \(1000 { kg/m}^3\))
Let $ P_n = \alpha^n + \beta^n $, $ n \in \mathbb{N} $. If $ P_{10} = 123,\ P_9 = 76,\ P_8 = 47 $ and $ P_1 = 1 $, then the quadratic equation having roots $ \alpha $ and $ \frac{1}{\beta} $ is:
- JEE Main - 2025
- Relations and functions
- Density of 3 M NaCl solution is 1.25 g/mL. The molality of the solution is:
- JEE Main - 2025
- Solutions
View More Questions
Concepts Used:
Some Basic Concepts of Chemistry
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.
Read More: Some Basic Concepts of Chemistry
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.