| 1. | In an aqueous solution, chromate and dichromate ions can be interconvertible.
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| 2. | The excess dichromate is determined by titration against sodium thiosulfate.
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| 3. | Accuracy can be improved by calibrating the dichromate solution against a blank.
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| 4. | The higher the proportion of dichromate, the more sensitive the mixture.
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| 5. | Not all of the ammonium dichromate decomposes in this reaction.
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| 6. | The net reaction is that the dichromate oxidizes the iron.
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| 7. | When the dichromate is all reduced, the reaction stops.
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| 8. | Both methods normally use acidic chromate or dichromate solutions.
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| 9. | The mordant, potassium dichromate, is applied as an after-treatment.
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| 10. | A colloid sensitized with a dichromate is applied evenly to the taut screen.
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