Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasynumerical

26.8 gm $N a_{2} S O_{4} . n H_{2} O$ contains 12.6 of water here the value of 'n' is?

Answer:

7.00

Solution:

$N a_{2} S O_{4} . n H_{2} O$

Molar mass of this salt $= (142 + 18 n)$

Mass of water $= \frac{12.6}{26.8} \times (142 + 18 n)$

$18 n = \frac{12.6}{26.8} (142 + 18 n)$

On solving $n = 7$

Stream:NTA_ABHYASSubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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