Question

formula and valency of chromate

Answer 1

Formula of Chromate is CrO4 ^-2
Valency of chromate is 2
NOTE:-We should not keep any sign(+ or -) for valency

Answer 2

Formula and Valency of chromate

• Chromate is an ion which is present in the chromium salt. When the element chromium has an oxidation state as 6+, it produces chromate ions as oxoanions.
• Chromate ion acts as reducing agents.
• Its chemical formula is $CrO_4^2-$.
• Valency refers to the number of electrons gained, lost or shared to make the outermost shell fill with 8 electrons.
• In the case of chromate ion, it bonds by gaining 2 electron, thus its valency is 2-.

Learn more about chromate ions

In alkaline solution ,we have chromate ions in acidic solution we have dichromate ions back .explain the reason.

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How chromate ions be converted into dichromate ions?

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