Which of the reagents would oxidize cr to cr3+, but not pb to pb2+? co br− ca2+ ca br2 co2+?
Which of the following reagents would oxidize chromium (Cr) to chromium (III) ion (Cr³⁺) without oxidizing lead (Pb) to lead (II) ion (Pb²⁺)? The reagents are: Co, Br⁻, Ca²⁺, CaBr₂, and Co²⁺.
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