manganate

When a solution containing the green manganate ion

The Nobel Prize in Chemistry 1992 1992

By several methods, manganate of baryta may be obtained either as an emerald-green, a bluish-green, or a pale green.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field

On allowing the solution to stand exposed to the air, it rapidly becomes blue, violet, purple, and finally red, by the gradual conversion of the manganate into the permanganate of potash; and on account of these changes of color the black mass has received the name of mineral chameleon.

Scientific American Supplement, No. 401, September 8, 1883 Various

~ When carbon dioxide is passed through a solution of a manganate a part of the manganese is changed into manganese dioxide, while the remainder forms a salt of the unstable acid HMnO_ {4}, called permanganic acid.

An Elementary Study of Chemistry William McPherson

The black mass which results from this operation is soluble in water, to which it communicates a green color, due to the presence of the manganate.

Scientific American Supplement, No. 401, September 8, 1883 Various

The green compound (K_ {2} MnO_ {4}) is called potassium manganate, and is

An Elementary Study of Chemistry William McPherson

This reaction recalls the formation of a manganate under similar conditions.

An Elementary Study of Chemistry William McPherson

Now, however, this difficulty has been partly overcome by so preparing the manganate as to prevent fusion, and to keep it in a spongy state, which gives very high results, and the substance being practically everlasting, the cost of production is extremely low.

Scientific American Supplement, No. 795, March 28, 1891 Various

Potassium 287 acid carbonate 294 acid sulphate 294 acid sulphite 294 alum, aluminium 334 alum, chrome 384 alum, iron 352 and plant life 287 aurate 396 bromide 290 carbonate 293 chlorate 291 chloride 290 chromate 385 cyanide 293 dichromate 386 ferricyanide 352 ferrocyanide 352 hydroxide 288 hydroxide, action of halogens 289 hypochlorite 289 iodide 290 manganate 381 nitrate 291 occurrence 287 permanganate 381 preparation 288 sulphate 294

An Elementary Study of Chemistry William McPherson

This gas was made by the calcium-manganate method and represented a high degree of purity for commercial oxygen.

Respiration Calorimeters for Studying the Respiratory Exchange and Energy Transformations of Man Francis Gano Benedict 1913