Penentuan Kesadahan Ca 2+ dan Mg 2+ Pada Air Baku dan Air Resevoir Di PDAM Tirtanadi Instalasi Delituamedan
iv
PENENTUAN KESADAHAN Ca2+ DAN Mg2+PADA AIR BAKU DAN AIR
RESERVOIR DI PDAM TIRTANADI INSTALASI DELITUA MEDAN
ABSTRAK
Telah dilakukan analisa kesadahan pada air baku dan air reservoir di PDAM
Tirtanadi Instalasi Delitua Medan. Kesadahan air terutama disebabkan oleh ion –
ion Ca2+ dan Mg2+, kesadahan magnesium dan kalsium di tentukan dengan metode
titrasi menggunakan Na2EDTA dan indikator EBT untuk kesadahan total dan
indikator mureksid untuk kadar kalsium. Nilai kesadahan magnesium ditentukan
dengan pengurangan volume (ml) titrasi Na2EDTA pada kesadahan total CaCO3
dengan volume (ml) titrasi Na2EDTA pada kadar kalsium. Dari hasil titrasi
diperoleh kesadahan total air baku 222,6 mg CaCO3/L , kadar kalsium 17,28 mg
Ca/L , kadar magnesium 42,mg Mg/L dankesadahan total air reservoir 74,66 mg
CaCO3/L , kadarkalsium 13,28 mg Ca/L , kadar magnesium 10,06 mg /Mg/L.Nilai
kesadahan air pada air reservoir di PDAM Tirtanadi intalasi delitua Medan telah
memenuhi standar kesadahan menurut EPA,1974 .
Universitas Sumatera Utara
v
DETERMINATION HARDNESS Ca2+ AND Mg2+OFRAW
WATERANDWATERRESERVOIRINSTALLATIONINPDAM
TIRTANADI DELITUA MEDAN
ABSTRACT
Has conducted analysis on the raw water hardness and water reservoir in PDAM
Tirtanadi Installation Delitua Medan. Mainly caused by water hardness ions - ions
Ca2 + and Mg2+ , magnesium and calcium hardness is determined by titration
method using Na2EDTA and indicators EBT to total hardness and mureksid
indicator for the level of calcium. Magnesium hardness value is determined by the
reduction in volume (ml) Na2EDTA titration the total hardness of CaCO3 with the
volume (ml) Na2EDTA titration on calcium levels. From the results obtained by
titration of total hardness of raw water 222.6 mg CaCO3 / L, 17.28 mg calcium
levels Ca / L, 42 levels of magnesium, Mg mg / L and total hardness of water
reservoirs 74.66 mg CaCO3 / L, calcium levels 13 , 28 mg Ca / L, magnesium
content of 10.06 mg / mg / L. The value of water hardness in the water reservoir in
the taps Tirtanadi intalasi Delitua Medan has met the standard hardness according
to the EPA, 1974.
Universitas Sumatera Utara
PENENTUAN KESADAHAN Ca2+ DAN Mg2+PADA AIR BAKU DAN AIR
RESERVOIR DI PDAM TIRTANADI INSTALASI DELITUA MEDAN
ABSTRAK
Telah dilakukan analisa kesadahan pada air baku dan air reservoir di PDAM
Tirtanadi Instalasi Delitua Medan. Kesadahan air terutama disebabkan oleh ion –
ion Ca2+ dan Mg2+, kesadahan magnesium dan kalsium di tentukan dengan metode
titrasi menggunakan Na2EDTA dan indikator EBT untuk kesadahan total dan
indikator mureksid untuk kadar kalsium. Nilai kesadahan magnesium ditentukan
dengan pengurangan volume (ml) titrasi Na2EDTA pada kesadahan total CaCO3
dengan volume (ml) titrasi Na2EDTA pada kadar kalsium. Dari hasil titrasi
diperoleh kesadahan total air baku 222,6 mg CaCO3/L , kadar kalsium 17,28 mg
Ca/L , kadar magnesium 42,mg Mg/L dankesadahan total air reservoir 74,66 mg
CaCO3/L , kadarkalsium 13,28 mg Ca/L , kadar magnesium 10,06 mg /Mg/L.Nilai
kesadahan air pada air reservoir di PDAM Tirtanadi intalasi delitua Medan telah
memenuhi standar kesadahan menurut EPA,1974 .
Universitas Sumatera Utara
v
DETERMINATION HARDNESS Ca2+ AND Mg2+OFRAW
WATERANDWATERRESERVOIRINSTALLATIONINPDAM
TIRTANADI DELITUA MEDAN
ABSTRACT
Has conducted analysis on the raw water hardness and water reservoir in PDAM
Tirtanadi Installation Delitua Medan. Mainly caused by water hardness ions - ions
Ca2 + and Mg2+ , magnesium and calcium hardness is determined by titration
method using Na2EDTA and indicators EBT to total hardness and mureksid
indicator for the level of calcium. Magnesium hardness value is determined by the
reduction in volume (ml) Na2EDTA titration the total hardness of CaCO3 with the
volume (ml) Na2EDTA titration on calcium levels. From the results obtained by
titration of total hardness of raw water 222.6 mg CaCO3 / L, 17.28 mg calcium
levels Ca / L, 42 levels of magnesium, Mg mg / L and total hardness of water
reservoirs 74.66 mg CaCO3 / L, calcium levels 13 , 28 mg Ca / L, magnesium
content of 10.06 mg / mg / L. The value of water hardness in the water reservoir in
the taps Tirtanadi intalasi Delitua Medan has met the standard hardness according
to the EPA, 1974.
Universitas Sumatera Utara