
Kristalisasi
Presentation
•
Science
•
8th Grade
•
Hard
Anna Masriyani
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6 Slides • 0 Questions
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Kristalisasi
By Desak Hariningsih-Anna Masriyani
2
Pengertian
Kristalisasi adalah metode pemisahan untuk memperoleh zat padat yang terlarut dalam suatu larutan.
Dasar metode kristalisasi adalah kelarutan bahan dalam suatu pelarut dan perbedaan titik didih.
By Desak Hariningsih-Anna Masriyani
3
Terdapat dua cara kristalisasi, yaitu kristalisasi penguapan dan kristalisasi pendinginan.
Kristalisasi penguapan dilakukan jika zat yang akan dipisahkan tahan terhadap panas dan titik bekunya lebih tinggi daripada titik didih pelarut. Contohnya pembuatan garam dapur.
By Desak Hariningsih-Anna Masriyani
4
By Desak Hariningsih-Anna Masriyani
5
By Desak Hariningsih-Anna Masriyani
6
Kristalisasi pendinginan dilakukan dengan cara mendinginkan larutan. Ketika suhu larutan turun, komponen zat yang memiliki titik beku lebih tinggi akan membeku terlebih dahulu, sementara zat lain masih larut hingga keduanya dapat dipisahkan melalui penyaringan. Kristalisasi pendinginan digunakan pembuatan natrium asetat dari campuran asam asetat dengan natrium karbonat, natrium bikarbonat, atau natrium hidroksida.
By Desak Hariningsih-Anna Masriyani
Kristalisasi
By Desak Hariningsih-Anna Masriyani
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