dichromate

/dahy-kroh-meyt/US // daɪˈkroʊ meɪt //UK // (daɪˈkrəʊmeɪt) //

重铬酸盐,重铬酸盐,重铬酸钠,重铬酸钾

Definitions

n.名词 noun

1
- : Chemistry. a salt of the hypothetical acid H2Cr2O7, as potassium dichromate, K2Cr2O7.

The dichromate is first dissolved, and the acid added gradually.
On boiling it with copperas it becomes violet, while on boiling with potassium dichromate it changes to a yellowish brown.
Potassium dichromate, 3/8 oz.; hot water, 1/2 pint; dissolve, and add all together.
Potassic dichromate (bichromate of potash: bichrome) contains potassium, chromium, and oxygen.
Potassium dichromate might therefore be called potassium pyrochromate.