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Melting and Boiling Points

53.On heating...

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53.On heating 1.763g of hydrated BaCl_2 to dryness, 1.505 g of anhydrous salt remained. Hence the formula of hydrate is

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Q. On heating 1.763g of hydrated

B a C l_{2}

to dryness 1.505g of an hydrous salt remained. What is the formula of hydrate ?

2

millimoles of hydrated copper sulphate salt

(C u S O_{4} .5 H_{2} O)

is heated to dryness, then calculate the obtained mass of anhydrous copper sulphate salt.
(Given: molar mass of

C u = 63.5 g/mol

)

Q. A crystalline hydrated salt on being rendered anhydrous loses 45.6% of its weight.
The percentage composition of the anhydrous salt is:

A l = 10.5 %, K = 15.1 %, S = 24.8 %

= 49.6 %

A l = 27, K = 39, S = 32

].

What is the empirical formula of the hydrated salt?

Q. Anhydrous magnesium chloride is obtained by heating the hydrated salt with dry ___.

Q. Hydrated magnesium chloride becomes anhydrous salt when it is heated:

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