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How much KClO(3) must be heated to produ...

How much `KClO_(3)` must be heated to produce as much oxygen as that would be obtained from 200g of HgO? [Hg=200.5, K=39]

Text Solution

Verified by Experts

HgO when heated produces Hg and `O_(2)`:
`underset((2xx216.5)g)(2HgO)to2Hg+underset(32g)(O_(2))`
`therefore`Amount of `O_(2)` obtained from 200g of `HgO=(32xx100)/(2xx216.5)g`
Preparation of `O_(2)` from `KClO_(3)`:
`underset((2xx122.5)g)(2KClO_(3)) to 2KCl +underset(96g)(3O_(2))`
96g `O_(2)` is obtained by heating `2xx122.5g` of `KClO_(3)`
`therefore (32xx200)/(2xx216.5)g` `O_(2)` is obtained by heating
`(2xx122.5)/(96)xx(32xx200)/(2xx216.5)g=37.72g` of `KClO_(3)`.
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