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1.249g of a sample fo pure BaCO(3) and i...

`1.249g` of a sample fo pure `BaCO_(3)` and impure `CaCO_(3)` containing some `Cao` was treated with dil.`HCI` and it `BaCrO_(4)` was precipitaate was dissolvbed in dilute `H_(2)SO_(4)` and with `KI` solution libetared iodine which required exactly `20mL` of `0.05N Na_(2)S_(2) O_(3)`. Calculate percentage of `CaO` in the sample.

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The correct Answer is:
`14.09%`
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P BAHADUR-RADIO ACTIVITY-Exercies 9
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  2. 25mL of a solution of ferric alum Fe(2)(SO(4))(3) (NH(4))(2) (SO(4))//...

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  3. A 2.5g sample containing As(2) O(5) Na(2) HAsO(3) and inert substance...

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  4. Calculate the weight of MnO(2) and the volume fo HCI of specific grav...

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  5. Chile saltpetre, a source of NaNO(3) also contains NalO(3). The NalO(3...

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  6. (a) CusO(4) reacts with KI in acidic medium to liberate I(2): 2CuSO(...

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  7. Calculate the amont of SeO(4)^(2-) in solution on the basic of the fo...

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  8. A mixture containg As(2)O(3) and As(2)O(5) and required 20.10mL of 0.0...

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  9. In a quality control analysis for sulphur impurity 5.6g steel sample w...

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  10. 0.108g of finely divided copper was treated with an excess of ferric s...

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  11. 1.249g of a sample fo pure BaCO(3) and impure CaCO(3) containing some...

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  12. A 10g mixture of Cu(2)S and CuS was treated with 200 mL of 075M MnO(4...

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  13. For estimating ozone in the air, a ceratin volume of air is passed t...

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  14. A forensic chemist needed to determine the conventration of HCN in the...

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  15. A mixture of two gases, H(2)S and SO(2) is passes throgh three beakers...

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  16. A 0.141g sample of phosphorus containing compound was digested in a mi...

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  17. 1g of a sample of NaOH was dissolved in 50mL 0.33M alkaline solution o...

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  18. How many mole of FeCl(3) can be prepared by the reaction of 10g pf KMn...

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  19. A steel sample is to be analysed fo rCr and Mn simultaneously. By suit...

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  20. A define amount of impure sample of P(4)O(6) is treated with 20 mL of ...

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