A 2.76g impure sample of copper ore is d...

A 2.76g impure sample of copper ore is dissolved and `Cu^(2+)` is titrated with KI solution. `l_2` liberated required 40 mLof `0.1MNa_2S_2O_3` solution for titration. What is the `%` impurity present in the ore ?

Text Solution

Verified by Experts

Topper's Solved these Questions

MOLE AND STOICHIOMETRY-I
PATHFINDER|Exercise QUESTION BANK|234 Videos
ORGANIC CHEMISTRY: SOME BASIC PRINCIPLES AND TECHNIQUES
PATHFINDER|Exercise QUESTION BANK|85 Videos

Similar Questions

Explore conceptually related problems

0.804 g sample of iron was dissolved in acid , Iron was reduced to +2 state and it required 47.2 mL of 0.112 N KMnO_4 solution for titration. Calculate the percentage of iron and Fe_3O_4 in the ore.

A solution of H_2O_2 has normality N/1.7 what is its % strength.

6.2 gm of a sample containing Na_2CO_3, NaHCO_3 & non volatile impurity on gentle heating loses 5% of its weight due to the reaction 2NaHCO_3 rarr Na_2CO_3 + CO_2 + H_2O Residue is dissolved in water to form 100 ml solution & its 10 ml portion requires 7.5 ml of 0.2 M aqueous solution of BaCl_2 for complete precipitation of carbonates . What is the weight of Na_2CO_3 in gm in the origin sample ?

A100 ml solution of 0.1 N HCl was titrated with 0.2 N NaOH solution. The titration was discontinued after adding 30 ml of NaOH solution. The remaining titration was completed by adding 0.25 N KOH solution. The volume of KOH required for completing the titration is

20 mL of a H_(2)O_(2) solution after acidification required 20 mL of N/10 KMn O_(4) solution for complete oxidation. Calculate the percentage and volume strength of H_(2)O_(2) solution.

Calculate the volume strength of 1% H_(2)O_(2) solution.

How many g of KCl would have to be dissolved in 60 g H_2O to give 20% by weight of solution ?

1.575 g of oxalic acid (COOH)_2. xH_2O are dissolved in water and the volume made upto 250 mL. On titration 16.68 mL of this solution requires 25 mL of N/15 NaOH solution for complete neutralization. Calculate x.

To a 25 ml H_2O_2 solution, excess of 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_2O_2 solution.

PATHFINDER-MOLE AND STOICHIOMETRY-II-QUESTION BANK

A mixture contains 1.0 mole each of NaOH, Na2CO3 and NaHCO3. When half...
Text Solution
|
What happens when xenon and fluorine are reacted in the ratio 1:20 res...
Text Solution
|
A 2.76g impure sample of copper ore is dissolved and Cu^(2+) is titrat...
Text Solution
|
The volume of 0.2M solution of MnO4^(-) which will react with 50.0 ml...
Text Solution
|
Titration of 0.2121g of pure Na2CO4(134g mol^-1) require 43.31 ml of K...
Text Solution
|
1.44g pure FeC2O4 was dissolved in dil. H2SO4 and solution diluted to ...
Text Solution
|
0.592 g of calcium oxalate was dissolved in dilute acid and the soluti...
Text Solution
|
10 mL of a blood sample (contains calcium oxalate) is dissolved in aci...
Text Solution
|
What is molality of equimolar mixture of water and ethanol ?
Text Solution
|
0.56 g of limestone was treated with oxalic acid to give CaC2O4. The p...
Text Solution
|
A, B and C have oxidation number of +6, -2 and -1 respectively. What w...
Text Solution
|
5.7 g of bleaching powder was suspended in 500 ml of water. 25 ml of t...
Text Solution
|
A solution of 0.1 M KMnO4 is used for the reaction : s2O3^(2-)+2MnO4^-...
Text Solution
|
In aqueous alkaline solution, two electron reduction of HO2^- gives
Text Solution
|
Assuming complete ionization, same moles of which of the following com...
Text Solution
|
The equation which is balanced and represents the correct product(s) i...
Text Solution
|
If Cl2 is passed through hot aqueous NaOH, the products formed have Cl...
Text Solution
|
The equivalent weight of K2Cr2O7in acidic medium is expressed in terms...
Text Solution
|
5 moles of Ba(OH)2 are treated with excess of CO2 How much BaCO3will b...
Text Solution
|
The equivalent weight of potassium permangante in alkaline solution is...
Text Solution
|