Sabtu, 14 April 2012

indikator


a. Titration of NaOH by HClDiketahui: The concentration of NaOH = mLVHCl NNaOHVNaOH = 10 = 2 M NHCl mLMHCl = 0.1 = 0.1 NDitanya: MNaOH = ..... Answer: NHCl. VHCl = MNaOH. VNaOH

0.1. 2 = MNaOH. 100.2 = 10. MNaOH = 0.02 M b. Titration of HCl by NaOHDiketahui: The concentration of NaOH = NNaOHVNaOH = 2.85 mLMHCl mLVHCl = 10 = 0.1 M = 0.1 NHCl NDitanya:

MNaOH = ..... Answer: NHCl. VHCl = MNaOH. VNaOH0, 1. 10 = X. XX 2.851 = 2.85 = 0.35 MB. Pembahasan1. Making Solvent-making process NaOHPada NaOH solution, with distilled water into the fire to the point labutakar tera, and then shake until a homogeneous, makaterjadi reaction is characterized by a hot solution, the reaction occurs eksotermal, danketika diluted solution became clear. Chemical reactions occur: NaOH (s) + H2O HCl aqueous

2. Titration of NaOH with HCl as HCl titration of NaOH titranPada a visible color change when HCl ditetesimetil red. The use of methyl red indicator in the titration of weak bases and amoniumhidroksida because it has a pH from 4.2 to 6.2. Color changes to yellow, then turned into a pink solution of HCl and NaOH drops of methyl red. Dilution obtained for molarity of 0.02 M. Yangterjadi chemical reactions, yaituHCl H2O3 + NaCl + NaOH. HCL titration with NaOH as titranIndikator fenoftalein has a pH between 8 to 9.6 because fenoftalein including asamlemah in an ionized state. The color change that occurs is menjadikuning, then the color changes again after the solution of NaOH and HClditetesi fenoftalein buret and the color to pink. Yangdihasilkan molarity is 0.03 M. Reaction occurs, ie HCl + NaOH NaCl + H2OVI. KESIMPULANKesimpulan that can be drawn from this experiment are: 1. The process used to determine accurately the concentration of a larutandikenal as standardization.

2. Indicators used in titration experiments to determine the color of the akandihasilkan. By using the appropriate indicator will then be able to read sifatlarutan tersebut.3. Calculation results obtained for the concentration of acid-base titration of 0.02 M, to the acid-base titration by 0.35 MDAFTAR PUSTAKABaroroh, Umi L. U. , 2004. I. Basic chemistry dictates Gastric University Mangkurat.Banjarbaru.Brady, J. E. Of 1999. University Chemistry Principles and Structure. Binarupa Literacy: Jakarta.Gunawan, Adi and Roeswati. , 2004. Chemical agile. Kartika. Surabaya.Khopkar, S. M. 1990. Basic Concepts of Analytical Chemistry. University of Indonesia:

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