Chrome alum facts for kids
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Chrome alum, also known as chromium potassium sulfate, is a special chemical compound. Think of it as a tiny building block made from different parts. Its chemical formula is KCr(SO4)2. This means it contains three main ingredients: chromium, potassium, and a group of atoms called sulfates. The chromium part has a specific electrical charge, which scientists call an oxidation state.
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What is Chrome Alum Like?
Chrome alum is a dark purple solid. It often comes with extra water molecules attached to its structure. This makes it a type of crystal that includes water. It dissolves easily when you put it in water.
How is Chrome Alum Made?
Scientists create chrome alum using a chemical process. They start with a substance called potassium dichromate. Then, they add a gas called sulfur dioxide. This process changes the potassium dichromate into chrome alum.
What is Chrome Alum Used For?
In the past, chrome alum was very important. It was used in making leather. It helped to 'tan' the leather, making it tough and long-lasting. Today, a similar chemical called chromium(III) sulfate is used for this purpose instead.
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