A0.495 g sample of iron containing salt required 20.22 ml of 0.0194 m permanganate solution to reach the endpointof a titration. what is the percent of iron (55.845 g/mol) in the salt

% Fe in the sample = 22.0%

Explanation:

The redox reaction between iron and  permanganate is:

Moles of permanganate required is:

Based on the reaction stoichiometry:

5 moles of iron requires 1 mole of permanganate solution

Therefore, 0.000392 mols of permanganate would need:

Mol mass of iron (Fe) = 55.845 g/mol

Mass of iron present is:

it is a good conductor

explanation:

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l