A 0.56 g sample of limestones is dissolv...

A `0.56` g sample of limestones is dissolved in acid and the calcium is precipitated as calcium oxalate .The precipitate as calcium oxalate the prepcipate is filtered washed with water and dissolved in dil `H_(2)SO_(4)` The solution required `40ml` of `0.25NKmnO_(4)` solutions for titration .Calculate percentage of `CaO` in limestone sample.

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A 0.56 g sample of limestones is dissolved in acid and the calcium is precipitated as calcium oxalate .The precipitate as calcium oxalate the prepcipate is filtered washed with water and dissolved in dil H_(2)SO_(4) The solution required 40ml of 0.25NKmnO_(4) solutions for titration .Calculate percentage of 0.25N KMnO_(4) solution for titration .Calculate of 0.25N KMnO_(4) solution for titration ,Calculate percentage of CaO in limestone sample.

A 0.518 g sample of limestone is dissolved in HCl and then the calcium is precipitated as CaC_(2)O_(4) . After filtering and washing the precipitate, it requires 40.0 filtering and washing the precipitate, it requires 40.0 mL of 0.250 N KMnO_(4) , solution acidified with H_(2)SO_(4) to titrate it as. The percentage fo CaO in the sample is: MnO_(4)^(-)+H^(+)+C_(2)O_(4)^(2-)rarrMn^(2+)+CO_(2)+2H_(2)O

0.56 g of limestrone was treated with oxalic acid to give CaC_(2)O_(4) . The precipitate decolourised 50 " mL of " (M)/(25) KMnO_(4) in acidic medium. Calculate percentage of CaO in limestone.

A sample of sodium carbonate contains sodium also. 1.5 g of the sample is dissolved in water and volume raised to 250 mL. 25 mL of this solution requires 20 mL of (N)/(10)H_(2)SO_(4) solution for neutralisation. Calculate the percentage of sodium carbonate in the sample.

0.56 g of lime stone was treated with oxalic acid to give CaC_(2)O_(4) . The precipitate decolorized 45 ml of 0.2N KMnO_(4) in acid medium. Calculate % of CaO in lime stone.

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