Question

valency of potassium di chromate​

Answer 1

Answer:

potassium di chromate formula=K2Cr2O7

Explanation:

Dichromate ion is Cr2O7(2-) so its valency is 2 and oxidation state of Cr is +6 its important compound is K2Cr2O7.

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Answer 2

The valency of potassium dichromate is -2 and the oxidation state of chromium is +6.

• K2Cr2O7 is potassium dichromate.
• (Cr2O7)2- have a valence of 2 because of the -2 charge.
• Valency is the number of electrons present in the valence shell of an element.
• The oxidation state of chromium in K2Cr2O7 is calculated by 2+2x-14 = 0, x= +6.
• K2Cr2O7 is a strong oxidising agent and is used in the laboratory for quantitative analysis.
• K2Cr2O7 is orange coloured solid with a molecular weight of 294 grams.
• It is used as a primary standard in titration reactions.