Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

A sample of a hydrate of barium chloride weighing 61 g was heated until all the water of hydration is removed. The dried sample weighed 52 g. The formula of the hydrated salt is: (atomic mass, Ba = 137 amu, Cl = 35.5 amu)

Options:

Answer:

Solution:

$B a C l_{2} \cdot x H_{2} O \to B a C l_{2} + x H_{2} O$

$(137 + 2 \times 35.5 + 18 x)$

$= (208 + 18 x)$ g/mole

$\frac{208 + 18 x}{208} = \frac{61}{52}$

$10816 + 936 x = 12688$

$936 x = 1872$

$x = 2$

Formula is $B a C l_{2} \cdot 2 H_{2} O$

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

⏱ 2mℹ️ Source: PYQ_2020

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