Home
Class 12
CHEMISTRY
When 25 " mL of " an aqueous solution of...

When 25 " mL of " an aqueous solution of `H_2O_2` is titrated with an excess of KI solution in dilute `H_2SO_4`, the liberated `I_2` required 20 " mL of " 0.3 N`Na_2S_2O_3` solution for complete reaction.volume strength of `H_2O_2` solution.

Text Solution

Verified by Experts

Meq. of `H_(2)O_(2)` in 25 ml = Meq. of `Na_(2)S_(2)O_(3) = 20 xx 0.3 = 6 `
Normality of `H_(2)O_(2) = 6/25`
Volume strength of `H_(2)O_(2) = 5.6 xx N_(H_(2)O_(2)) rArr 5.6 xx 6/25 = 1.344 `V
Promotional Banner

Similar Questions

Explore conceptually related problems

The volume strength of 0.92 N H_2O_2 solution is

Free iodine is titrated against standard reducing agent usually with sodium thiosulphate , i.e. K_(2)Cr_(2)O_(7) + 6Kl + 7H_(2)SO_(4) to Cr_(2)(SO_(4))_(3) + 4K_(2) SO_(4) + 7H_(2)O+l_(2) 2CuSO_(4) + 4Kl to Cu_(2)l_(2) + 2K_(2)SO_(4) + l_(2) l_(2) + Na_(2)S_(2)O_(3) to 2Nal + Na_(2)S_(4)O_(6) In iodometric titration, starch solution is used as an indicator. Starch solution gives blue or violet colour with free iodine .At the end point , blue or violet colour disappears when iodine is completely changed to iodide. 50 ml of an aqueous solution of H_(2)O_(2) was treated with excess of Kl in dil. H_(2)SO_(4) . The liberated iodine required 20 ml of 0.1 N Na_(2)S_(2)O_(3) for complete reaction. The concentration of H_(2)O_(2) is

The volume strength of 1*5 N H_(2)O_(2) solution is

The volume strength of 1.5 N H_(2)O_(2) solution is

Calculate the volume strength of an N/10H_(2)O_(2) solution.

638.0 g of CuSO_(4) solution is titrated with excess of 0.2 M KI solution. The liberated I_(2) required 400 " mL of " 1.0 M Na_(2)S_(2)O_(3) for complete reaction. The percentage purity of CuSO_(4) in the sample is

Excess of Kl and dil. H_2SO_4 were mixed in 50 mL H_2O_2 . The liberated l_2 required 20 mL 0.1 N Na_2S_2O_3 . Find out the strength of H_2O_2 in g "litre"^(-1) .

0.71 g of a sample of bleaching powder (CaOCl_2) is dissolved in 100 " mL of " water. 50 " mL of " this solution is titrated with KI solution. The I_2 so liberated required 10 mL 0.1 M Na_2S_2O_3 (hypo) solution in acidic medium for complete neutralisation. Calculate the percentage of available Cl_2 from the sample of bleaching power.

To a 25 mL H_(2)O_(2) solution excess of an acidified solution of potassium iodide was added. The iodine liberated required 20 mL of 0.3 N sodium thiosulphate solution Calculate the volume strength of H_(2)O_(2) solution.

10 " mL of " a sample of phenol was diluted with H_2O and made up to 1.0L . 20 " mL of " this solution was treted with 40 mL brominating solution (a mixture of KBrO_3 and KBr) in dil H_2SO_4 . Excess of KI was added, and the liberated I_2 required 15 " mL of " 0.1 M Na_2S_2O_3 for complete reaction. 25 " mL of " the same brominating solution, on similar treatment required, 20 " mL of " 0.1 M Na_2S_2O_3 . Calculate the weight of phenol per litre of the original sample.