Pembuatan Kalsium Karbonat Dari Batu Kapur Bukit Tui Kota Padang Panjang
Abstrak: A Research has been
done about preparing calcium carbonat from limestone of Bukit Tui Kota Padang
Panjang. The sample as much as 20 g was dissolved in HCl 6 M, the resulting
filtrate reacted with NH4OH 6 M to the
pH of 8 and reacted with (NH4)2CO3 6 M until no more precipitate was was formed. The precipitate was separated and
dried in oven for 4 hours at 105ยบ C. Ten g of the dried precipitate was
determined complexometrically using EDTA as complexson and murexide as
indicator. It was found that the limestone at Bukit Tui Kota Padang Panjang
contained 67.2 % w/w calcium carbonate in comparison to reference compound
103.99 % w/w.
Kata Kunci: Limestone, calcium
carbonat, complexometri
Penulis: Rusdi, Metalia
Maryesri, Zulharmitta
Kode Jurnal: jpfarmasidd130402
