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Catalyst 

A catalyst is a substance that changes the rate of a chemical reaction. However, it itself is chemically unchanged at the end of the reaction. A positive catalyst speeds up the rate of reaction. A negative catalyst slows down the rate of reaction. Only a small amount of catalyst is required to create a big change in the reaction. A catalyst is usually a transition metal such as platinum, nickel and iron.

For a list of catalysts, click here.

Mangkin

Mangkin ialah sesuatu bahan yang mempengaruhi kadar tindakbalas kimia. Mangkin sendiri tidak berubah secara kimia pada akhir tindakbalas. Mangkin positif mencepatkan kadar tindakbalas. Mangkin negatif melambatkan kadar tindakbalas. Hanya sedikit mangkin sahaja diperlukan untuk perubahan yang besar dalam sesuatu tindakbalas kimia. Contoh mangkin ialah platinum, emas dan besi.
Untuk senarai mangkin klik di sini.

 

 

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