Summary
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1.
FeSO4 and FeCl3 retard the reaction between tin and HNO3 and cause an increase in the yield of NH3 and a decrease in the hydroxylamine formed.
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2.
Retardation of the reaction by NaNO2 and no change in the rate of soultion by the addition of urea indicate that no HNO2 is formed, nor its presence is essential during the solution of tin in HNO3.
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3.
H2SO4 and TiCl3 retard the reaction when in lower concentrations, but accelerate the same at higher ones. There is a considerable increase in the yield of NH2OH and NH3. The catalytic effect of titanium ions is indicated.
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4.
Glucose in small concentrations does not affect the reaction.
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5.
NaNO3. NaHSO3, Na2SO3 and NaCl retard the reaction whilst NH4Cl does not. Action of Na ion is suggested.
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[Communicated by Dr. S. C. Devadatta, D.Sc. (Edin.)]
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Kasbekar, G.S., Normand, A.R. Reaction between nitric acid and tin in presence of catalysts—Part 1.. Proc. Indian Acad. Sci. (Math. Sci.) 5, 115–123 (1937). https://doi.org/10.1007/BF03036166
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DOI: https://doi.org/10.1007/BF03036166