video tutorial Make potassium chromate and dichromate

Potassium dichromate synthesis – summary

• Overview: converting chromium oxide with alkaline reagents into potassium chromate, then dichromate, followed by purification and crystallization to yield potassium dichromate.
• Process highlights: mixing starting materials, heating to melt, forming a solid paste, maintaining heat to promote reaction, acidifying to convert to dichromate, and crystallizing by cooling.
• Purification: multiple filtrations and washes, followed by recrystallization from hot water to improve purity and color.
• Yield: 18 g of potassium dichromate from starting chromium oxide, about 74% yield.
• Product: orange crystalline potassium dichromate, described as a high-quality commercial-like product used as an oxidizer in organic reactions.