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DO value of a water sample is 6 ppm. Cal...

`DO` value of a water sample is 6 ppm. Calculate the weight of dissolved oxygen present in 100 kg of water sample.

Text Solution

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`DO` value 6 ppm means, `10^(6) g` of water contains 6g of dissolved oxygen.
`10^(6) g` water `rarr 6g O_(2)`
`100kg (10^(5) g)` water `rarr (6xx10^(5))/(10^(6))=0.6 g`
Amount of dissolved oxygen in water `=0.6 g`.
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Knowledge Check

  • Dissolved oxygen present in natural water has

    A
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    B
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    D
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  • Hardness of water sample is 300 ppm CaCO_3 Hence its molarity is:

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    B
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    C
    is less than `25^@C`
    D
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