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k2cr2o7 hcl đặc nóng

k2cr2o7 + hcl đặc

trong phản ứng k2cr2o7 + hcl

cr + hcl đặc nóng

cr + h2so4 đặc nóng

hcl đặc + kmno4

cr + hno3 đặc nóng

kcl + h2so4 đặc

k2cr2o7 + sncl2 + hcl

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