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A hydrate of magnesium iodide has a form...

A hydrate of magnesium iodide has a formula `Mgl_(2).xH_(2)O.A 1.055 g` sample is heated to a constant weight of `0.695 g`. What is the value of `x` ?

A

`2`

B

`4`

C

`6`

D

`8`

Text Solution

Verified by Experts

The correct Answer is:
D
`(W_("sample"))/(W_("residuce")) = (M_(Mgl_(2).xH_(2)O))/(M_("residuce"(Mgl_(2))))`
`(1.055)/(0.695) = (278+18x)/(278)`
x = 8`
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