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Effects of electrolytes upon potential—pH relation of electrolytic gamma manganese dioxide

✍ Scribed by I. Tari; T. Hirai

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
451 KB
Volume
27
Category
Article
ISSN
0013-4686

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✦ Synopsis

Potcotial-pH relations of two electr&tic gaatms manguret dioxidea wers detcrmiaed _ NH&2 (pH'1-Q ZnCll (pH O-S), and (C&H,), ?Wl$@H 1-8) solutions in order to examine how g supporting f&ctr&tes at&t upon both mag&mde and pIi-nslponw of potqatial. -nlere was no sigil&ant di&rtlutin&e4Wects~fttlosc~~pH-rrrpbnrcof -o.omv.pH-'ataimdwasYerycloaeto the thsontiaf value of -0.059v.pH-' at 25-c mimmted from the foliowiug reaction. MnO,+H+ +e' = MnOOH. IO-adwrpti& found for Zp a+ and NH: ions did not hpve any effuzt upan the pH-respoaae, though a rcannrkabbefkct waaexpecte& Another pH-reqonse of -0.075 ~0.10OV.pH-' wasobtainedin NH,Cl-HQ (pH l-31 and fC,H,), NClO, -HCIO, (pIcf-2.5) solutions. This response was found to be caued bv soluble MI?* ions formed bv the well-known disproportionation reaction of Mn(III) bciig present ii the MnO, s&ptcs.

📜 SIMILAR VOLUMES

Effects of electrolytes upon potential-p
Effects of electrolytes upon potential-pH relation of synthetic beta manganese dioxide
✍ I. Tari; T. Hirai 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 393 KB

## AImtract -The pi+-response of electrode potential of a synthetic beta manganese dioxide was obtained as -O.OtiOV.pH-' inconcentrated ZnCl, solutions. TbepH-response of -0.060 V pH -1 was also obtained in (C,H,),NClO, solutions in the pH range 47 where the pH-response in L M NH&l was -O.lOOV.pH-

Potential—pH relations of synthetic beta
Potential—pH relations of synthetic beta manganese dioxide in NH4Cl Solutions
✍ I. Tari; T. Hirai 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 365 KB

## Ah&act -The potential of synthetic beta manganese dioxides was measured in NH,CI solutions as a function of pH. Since both the dioxides were stoichiometric and the solutions dim not contain any trace of manganous ions, pH-response of the potential was expected to he -0.059V.pH-r at 25°C. Howeve