ASIDIMETRI NATRIUM TETRA BORAT

PRIMARY STANDARD : Natrium Tetra Borat ( Na2B4O7.10 H2O)
BM : 381.37
Containing :99-105 % Na2B4O7.10 H2O ( pure )
Nymph : basic white powder PP, when blooming on the air often emerge the white powder
Condensation : dissolve in water especially in water boil, insoluble [of] draught etanol
INDICATOR : Methyl Red P. Sour 4-dimetil amino azobenzena 2-karboksilat ( C15H15N3)
Nymph : serbuk carmine/ Crimson crystal
Condensation : dissolve in etanol P ( 95%) , dissolve difficult in water
Route : giving to ruddle [at] acid solution of weak, yellow [at] acid very weak and alkali ( pH 4.2-6.3)
Asidi three representing titration to titrate the basa with the sour standard as a means of its measure. Primary factor in asidi three [is] the existence of ion H+ and OH- in larutanntitrannmaupun titrat.
Principal simply asidimetri is
OH-+H+→H2O
Alkali+acid → neutral
In asidi three owning pH extend,at a titration transportation;journey with the addition titran will cause the degradation pH at sampel. At the time of certain of meq titran=meq titrat ( meq = mass equivalent) and moment that is the so-called final point of titration
pH of where final point of titration happened by the shares which important thing, cause of this is key in inspection of method asidi three. Is for that needed a correct indicator. Indicator of according to oswald is an organic matter having the character of acid weak weak or basa which terdisosiasi in water and experience of the colour change with the change of rate H+ in condensation
In laboratory praktikum to make acid solution of nearby alkali from which wanted and thea [done/conducted] by standaisasi.
Primary condensation have to fulfill the conditions
1. Easy to find in the form of purification and easy to known its perity
2. easy to dried and do not higroskopis
3. Owning high BE ang so that lessen the balance mistake
4. Majored by a strong acid
Asidimetri commonly use for the stipulating of mount the kebasaan irrigate the, draught determine the elegibility consume the water

Bibliography
1. Anonim.1995.Farmakope edisi IV.Jakarta:Departemen Kesehatah RI.hal : 605
2. Anonim.1979.Farmakope edisi III.Jakarta:Departemen Kesehatah RI.hal : 705
3. Suharno.1989.Buku Ajar Kimia Analitik.Surabaya:Pusat Pendidikan Tenaga Kesehatan Depatemen Kesehatan RI.Hal : 133-136

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