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LAPORAN PRAKTIKUM 3 pH METER, BUFFER ... - OpenWetWare

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HASIL <strong>PRAKTIKUM</strong><br />

Tabel 1 : Ringkasan hasil pembuatan buffer fosfat<br />

<strong>pH</strong> tujuan Volume<br />

0.25M<br />

Na2HPO4<br />

(ml)<br />

Volume 0.25M<br />

NaH2PO4 (ml)<br />

Volume buffer<br />

fosfat(0,125M)<br />

yang disiapkan<br />

(ml)<br />

6,3 40 30 140<br />

6,8 40 8 96<br />

7 35 11 92<br />

7,5 40 1,5 83<br />

7,8 40 1 82<br />

Perhitungan Volume buffer fosfat (0,125M) yang disiapkan<br />

V1 x M1 = V2 x M2<br />

(40 + 30)x 0,25 = V2 x 0,125<br />

V2 = 82 ml<br />

Grafik 1. Hasil pembuatan buffer fosfat<br />

VOLUME (mL)<br />

160<br />

140<br />

120<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

1 2 3 4 5<br />

KELOMPOK<br />

<strong>pH</strong> Tujuan<br />

Volume 0.25M Na2HPO4 (ml)<br />

Volume 0.25M NaH2PO4 (ml)<br />

Volume buffer fosfat yang<br />

disiapkan (ml)

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