Mole Concept & Redox
Some Basic Concepts of Chemistry
Oxidation number of 'Co' in Hg[Co(SCN)4]
A sample of 1.0g of solid Fe2O3of80% purity is dissolved in a moderately concentrated HCl solution which is reduced by zinc dust. The resulting solution required 16.7mL of a 0.1M solution of the oxidant. Calculate the number of electrons taken up by the oxidant.
How many of the following given ppt with H2S in the presence of HCl Cu+2, As+3, Zn+2, Fe+2, Al+3, Na+, Bi+3, Cd+2
A silver coin weighing 11.34 g was dissolved in nitric acid. When sodium chloride was added to the solution all the silver (present as ) was precipitated as silver chloride. The weight of the precipitated silver chloride was 14.35 g. Calculate the percentage of silver in the coin -
A 6.85g sample of the hydratedSr(OH)2.xH2O is dried in an oven to given 3.13g of anhydrous sr(OH)2. What is the value of x? (Atomic masses : Sr=87.60.O=16.0,H=1.0)