1 gram of pyrolusite `(MnO_(2))` was boiled with excess of concentrated `HCl` and the issuing gas was passed through a solution of potassium iodide when 1.27 g of iodide were liberated. What is the percentage of pure `MnO_(2)` in the sample ?

When chlorine is bubbled through aqueous solution of potassium iodide, iodine gas is liberated because

When chlorine is bubbled through aqueous solution of potassium iodide, iodine gas is liberated because

8.7gm of pyrolusite (impure MmO_(2) ) were heated with concentrated HCl. The Cl_(2) gas evolved was passed through excess of KI solution. The iodine gas evolved required 80ml of (N)/(10) hypo solution. The precentage of MnO_(2) in pyrolusite will be : [Mn=55]

0.261 g of a sample of pyrolusite was heated with excess of HCl and the chlorine evolved was passed in a solution of KI. The liberated iodine required 90 mL (N)/(30) Na_(2)S_(2)O_(3) . Calculate the percentage of MnO_(2) in the sample.

What happens when HCL gas is passed through concentrated NaCl solution?

A 0.5 g sample containing MnO_(2) is treated with HCl liberating Cl_(2) is passed into a solution of KI and 30.0 " mL of " 0.1 M Na_(2)S_(2)O_(3) are required to titrate the liberated iodine. Calculate the percentage of MnO_(2) is the sample.