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General Arwana Forum Diskusi masalah-masalah arwana pada umumnya

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Old 06-21-2003, 09:34 AM   #1
JD Winata (5695)
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Join Date: Jul 2003
Location: Denpasar , Bali
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Sorry guys!!
sorry berat gue ada salah inget rumus kimianya tabel water buffer kemarin,
terbalik antara Na2HPO4 (acid Phospat) dan NaH2PO4 (alkaline Phospat)
Jadi tabel buffer solutionnya sbb:
Na2HPO4 NaH2PO4 pH
10% 90% 5.9
20% 80% 6.2
30% 70% 6.4
40% 69% 6.6
50% 50% 6.8
60% 40% 7.0
70% 30% 7.2
80% 20% 7.4
90% 10% 7.7

Sorry berat, gue terbalik, makanya gue bawa catatan kali ini deh,
By the way, ada info utk ngetest pH , paling akurat pake pH tester digital karena sampe 2 digit dibelakang koma, tapi inget untuk merendam indikatornya dalam buffer solution 7.0 agar gak perlu kalibrasi terus. Kalo mau test murmer gunakan Bromothymol blue (beli di toko kimia) bahan ini akan berwarna sbb:
Kuning pH 6.0
Kuning kehijauan pH 6.5
Hijau pH 7.0
Biru pH 7.6

Beli Bromothymol solution 0,1% , teteskan 10 tetes dalam 10 ml air dan lihat perubahan warnanya.
Good luck and sorry ttg terbaliknya Acid Phospat dan Alkaline Phospat dalam tabel buffer solution.
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