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ChemistryConcentration TermsConcentration termMedium2 minPYQ_2021
ChemistryMediumassertion reason

A 6.50 molal solution of KOHaq. has a density of 1.89 g cm-3. The molarity of the solution is mol dm-3. (Round off to the Nearest Integer).

[Atomic masses: K:39.0 u; O:16.0 u; H:1.0 u]

Answer:
9
Solution:

6.5 molal KOH=1000 gm solvent has 6.5 moles KOH

so, wt. of solute =6.5×56

=364 gm

wt. of solution =1000+364=1364

Volume of solution =13641.89 m

Molarity =mole of soluteVsolution  in Litre

=9.00

Stream:JEESubject:ChemistryTopic:Concentration TermsSubtopic:Concentration term
2mℹ️ Source: PYQ_2021

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