مصادر الكيمياء موقع لتعليم الكيمياء بصورة مبسطة
A chemical reaction that shows a periodic colour change between magenta and blue with a period of about one minute. It occurs with a mixture of sulphuric acid, potassium bromate(V), cerium sulphate, and propanedioic acid. The colour change is caused by alternating oxidation-reductions in which cerium changes its oxidation state (Ce3+ gives a magenta solution while Ce4+ gives a blue …
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