. Hydroxylamine : its quantitative determination and some double salts . ate was accurate in presenceof alkali. , of I used NapSg05 used 1 NapSgOg =:/^= I. I In presence of Na^PO^^ In pre3ance KgO is added When - : E2S0zi^ to neutralize the excessof Na^PO^ 3 of Mg 0 The determination was as follows:-To the weighed por-tion of an excess of the neutralizing agent was added andthe solution made up to about one hundred cuhic centimeters andimmediately ti
. Hydroxylamine : its quantitative determination and some double salts . ate was accurate in presenceof alkali. , of I used NapSg05 used 1 NapSgOg =:/^= I. I In presence of Na^PO^^ In pre3ance KgO is added When - : E2S0zi^ to neutralize the excessof Na^PO^ 3 of Mg 0 The determination was as follows:-To the weighed por-tion of an excess of the neutralizing agent was added andthe solution made up to about one hundred cuhic centimeters andimmediately titrated with the iodine solution of known strength^ it was found from the tests that the object is to get as smallan excess of the neutralizing agent as possible and also a smallexcess of iodine to be titrated back with thiosulphate because whensulphuric acid is added to neutralize any excess of alkali, it willset free hydriodic acid again. Further determinations with iodinesolution in which magnesium oxide was used as the neutralizingagent gave the following results:-. ~ 7~ No. of of Iodine of Na SgOgExpt. taken*^ found taken used used 1 .0122g .01474g 2 .0770f; .0705 g 3 .0779g .0768 g 4 .0863g .0858 g 5 .0411g .0395 g To calculate - :(NO cc I x factor) X = Wt. in grams of +The next method tried was the reduction of ferric sulphatewith hydroxylamine and the estimation of the ferrous salt with knownpermanganate solution. +Ebler and Schott usey chis method and claimto get good results . About one-tenth of a gram of the hydroxylaminesalt is dissolved in a little water and a known weight of ferric sul-phate and a few of sulphuric acid are added. The solution isheated to 90° and kept at that temperature for five minutes. The hy-droxylamine in hot acid solution is oxidized by means of ferric salts ;to nitrous oxide and + Og =N20+3H20 an
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