supply of chemicals for chemistry lab , chemicals , ammonium chloride ( 500 g ) , calcium carbonate ( 500 g ) , barium chloride ( 500 g ) , edta ( 100 g ) , ferrous ammonium sulphate ( 500 g ) , sodium chloride ( 500 g ) , sodium hydroxide ( 500 g ) , starch ( 500 g ) , potassium dichromate ( 500 g ) , sodium bicarbonate ( 500 g ) , sodium sulphate ( 500 g ) , potassium chromate ( 500 g ) , potassium iodide ( 500 g ) , potassium chloride ( 500 g ) , silver nitrate ( 25 g ) , manganese sulphate ( 500 g ) , sodium carbonate ( 500 g ) , sodium thiosulphate ( 500 g ) , methyl orange indicator ( 125 ml ) , phenolphthalein indicator ( 125 ml ) , eriochrome black t indicator ( 25 g ) , carbinol ( 500 ml ) , ammonia solution ( 2.5 l ) , sulphuric acid ( 2.5 l ) , ammonia buffer ( 500 ml ) , copper sulphate ( 500 g ) , acetic acid ( 2.5 l ) , ammonium thio cyanate ( 500 g ) , thiourea ( 500 g ) , potassium permanganate ( 500 g )