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Some Basic Concepts of Chemistry

Molality

The density of {NaOH} solution is 1.2 {~g} {~cm}^{-3}. The mol

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The density of $NaOH$ solution is $1.2 g cm^{- 3}$ . The molality of this solution is $m$ (Round off to the nearest integer)
[Use : Atomic masses : Na $23 u$ ; $O : 16.0 u$ $H : 1.0 u]$ Density of $H_{2} O : 1.0 g cm^{- 3}$ ]

Views: 9,625 students

Updated on: Jul 15, 2023

Exam:

JEE Mains 2021 July 27 Shift 1

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Asher Discussed

The density of

NaOH

solution is

1.2 g cm^{- 3}

. The molality of this solution is

m

(Round off to the nearest integer)
[Use : Atomic masses : Na

23 u

;

O : 16.0 u

H : 1.0 u]

Density of

H_{2} O : 1.0 g cm^{- 3}

]

8 mins ago

Discuss this question LIVE

8 mins ago

Text solutionVerified

Let volume of solution is x ml
So mass of solution = 1.2 x
& mass of water (solvent) = x gram
So mass of solute = 0.2 x gram
Molality =

\frac{W _{sdute} \times 1000}{GMM _{soluta} \times W _{solvent}} = \frac{0.2 x \times 1000}{40 \times x} = \frac{200}{40} = 5 m

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Question Text	The density of $NaOH$ solution is $1.2 g cm^{- 3}$ . The molality of this solution is $m$ (Round off to the nearest integer) [Use : Atomic masses : Na $23 u$ ; $O : 16.0 u$ $H : 1.0 u]$ Density of $H_{2} O : 1.0 g cm^{- 3}$ ]
Updated On	Jul 15, 2023
Topic	Some Basic Concepts of Chemistry
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 8
Upvotes	761
Avg. Video Duration	6 min

The density of $NaOH$ solution is $1.2 g cm^{- 3}$ . The molality of this solution is $m$ (Round off to the nearest integer)
[Use : Atomic masses : Na $23 u$ ; $O : 16.0 u$ $H : 1.0 u]$ Density of $H_{2} O : 1.0 g cm^{- 3}$ ]

Text solutionVerified

Filo tutor solutions (8)

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The density of NaOH solution is 1.2 g cm−3. The molality of this solution is m (Round off to the nearest integer)[Use : Atomic masses : Na 23u ;O:16.0u H:1.0u] Density of H2​O:1.0 g cm−3 ]

Text solutionVerified

Filo tutor solutions (8)

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The density of $NaOH$ solution is $1.2 g cm^{- 3}$ . The molality of this solution is $m$ (Round off to the nearest integer)
[Use : Atomic masses : Na $23 u$ ; $O : 16.0 u$ $H : 1.0 u]$ Density of $H_{2} O : 1.0 g cm^{- 3}$ ]