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For 0·125 M iron(III) nitrate solutions, the pH passes through a maximum with increasing base addition and the solution colour changes from the yellow characteristic of the low molecular weight species FeOH 2+ and Fe 2(OH) 2 4+ to the deep red-brown of high molecular weight polynuclear ...
I am sure that many of you are familiar with this experiment, however I am very new to chemistry, and I would like to know exactly what causes the colour change to occur between the first two compounds; why the solution becomes transparent after some time; and how do the other 4 compoun...
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Fig. 1. Absorption spectra of the MTB method: (A) Reaction product of ETM (15 μg/ml) with F–C reagent in Na2CO3 solution; (B) the blank. In the PB method, due to the reducing nature of ETM, iron(III) was reduced to iron(II) in acid medium. Subsequently, the iron(II) forme...
However, the presence in solution of ligands such as phosphate may also significantly affect reaction rates; a 50% reduction in sulphide removal rate for substrate removed from an online system was partly attributed to phosphate adsorption. The formation of a more crystalline, less reactive iron (...
hardly ever found in the free state. iron is used in the production of steel which is not an element but an alloy, a solution of different metals and some non-metals particularly carbon. uses of iron it is used to manufacture steel and also used in civil engineering like reinforced ...
What is the colour of iron (III) sulphate solution and its crystals( I don't know and cant find any info... ) 3. Test for nitrate The textbook test for nitrate invovles 1. add dilute sodium hydroxide 2. add a bit of aluminium powder ...
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例句 释义: 全部