Question

.what mass of anhydrous copper (ii) chloride (cucl2) can be obtained by heating 3.42 g of hydrated copper (ii) chloride (cucl2 2h2o) find the mass ?
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Answer 1

mass of anhydrous copper chloride is 2.69 g

it is given that anhydrous copper chloride can be obtained by heating 3.42g of hydrated copper chloride.

we have to find the mass of anhydrous copper chloride.

here CuCl₂.2H₂O ⇔CuCl₂ + 2H₂O

here it is clear that one mole of anhydrous copper chloride is made by one mole of hydrated copper chloride.

let's find no of mole of hydrated copper chloride.

given weight of hydrated copper chloride = 3.42g

molecular weight of hydrated copper chloride = 170.5 g/mol

now no of mole = 3.42/170.5 = 0.02

here no of mole of CuCl₂.2H₂O = no of mole of CuCl₂

⇒0.02 = weight of CuCl₂/134.5

⇒weight of CuCl₂ = 134.5 × 0.02 = 2.69 g

therefore, mass of anhydrous copper chloride is 2.69 g

Answer 2

Explanation:

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It is given that anhydrous copper chloride can be obtained by heating 3.42g of hydrated copper chloride. we have to find the mass of anhydrous copper chloride. here it is clear that one mole of anhydrous copper chloride is made by one mole of hydrated copper chloride.

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