Question

Hello guys ⟵(o_O) please help me out: What is the normality of Cr₂O₇²⁻ , when it loses 6 electrons and gets converted to Cr³⁺ ? Molar mass of dichromate ion = 294 g/mol

Answer 1

Explanation:

PubChem CID:

24503

Structure:

Dichromate_small.png

Find Similar Structures

Molecular Formula:

Cr2O7-2

Synonyms:

Dichromate

Dichromate ion

Bichromate

Dichromate(2-)

Dichromate ion(2-)

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Molecular Weight:

215.99 g/mol

Dates:

Modify:

2020-09-05

Create:

2005-03-27

Description:

Dichromate(2-) is a divalent inorganic anion obtained by removal of both protons from dichromic acid. It is a chromium oxoanion and a divalent inorganic anion. It is a conjugate base of a hydrogen dichromate.

Answer 2

Answer:

Cr₂O₇²⁻ undergoes reduction as the oxidation number of Cr decreases from +6 to +3. Half-reaction for reduction of Cr₂O₇²⁻ in acidic solution is: Cr₂O₇²⁻(aq) + 6e⁻ + 14H⁺(aq) → 2Cr³⁺(aq) + 7H₂O(ℓ) The answer: c. Cr₂O₇²⁻(aq) + 6e⁻ + 14H⁺(aq) → 2Cr³⁺(aq) + 7H₂O(ℓ) 0 3 0.