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5. Tests:
1. Formic Acid:
ing. Pamamaralan: Timbangan me ing 5 g ning sample (gamit ing technical balance) keng 100 ml a beaker. Dagdagan me ing 2 patak ning phenolphthalein indicator solution at i-neutralize me ing 2 N NaOH solution anggang mika kule yang maputi. I-evaporate keng water bath angga na keng kapitna ning orihinal a dagul. Palamigan, acidify keng 5 ml ning concentrated HCl, at ilipat keng 250 ml a iodine flask a maki 50 ml a danum ampo 50 ml a 0.1 N NaBrO a solusyun. takpan meng masikan, haluan meng masalese, at paburen meng makatalakad kilub ning 30 minutu. Dagdagan me ing 15 ml ning 16.5% KI solution, 20 ml ning 6 N HCl, ampo 2 ml ning starch indicator solution. Titrate gamit ing 0.1 N Na2S2O3 a solusyun anggang mawala ya ing kule asul (endpoint). Gawa kang blankung test sabay-sabay.
b. Kalkulasyun: (Blank ml – Sample ml) × 0.1 (Normality) × 0.02301 = gramu ning HCOOH
c. Grade Glacial Acetic Note: Ing pamagpainit keng water bath kaybat nang dinan NaOH buri na ing mag evaporate ya ampo ilako ing acetaldehyde, na nung ali maging sangkan ning matas a resulta.Grade Glacial Acetic.
2. Acetaldehyde:
ing. Pamamaralan: Timbangan me ing 10 g ning glacial acetic acid (gamit ing technical balance) keng 250 ml a iodine flask. Dagdagan me ing 50 ml a danum, kaybat i-pipette me ing eksaktung 10 ml ning 4% NaHSO3 a solusyun keng flask. takpan meng masikan, iyugse, at paburen meng makatalakad kilub ning 30 minutu. Dagdagan me ing 2 ml ning starch indicator solution at i-titrate me ing 0.1 N Iodine solution anggang mika kule yang asul (endpoint). Gawa kang blankung test sabay-sabay.
b. Kalkulasyun: (Blank ml – Sample ml) × 0.1 (Normality) × 0.02203 = gramu ning CH3CHO
6. Pamagsadya king Reagent:
0.1 N Sodium Hypobromite (NaBrO) Solution: Dagdagan me ing 2.8 ml ning bromine keng 500 ml ning danum. Dagdagan me ing 100 ml ning 2 N NaOH at gisa me anggang matunaw ya. I-dilute keng danum anggang 1000 ml para mika 0.1 N NaBrO solution.
6. Grade Glacial Acetic Reagent Preparation:
0.1 N Sodium Hypobromite (NaBrO) Solution: Dagdagan me ing 2.8 ml ning bromine keng 500 ml ning danum. Dagdagan me ing 100 ml ning 2 N NaOH at gisa me anggang matunaw ya. I-dilute keng danum anggang 1000 ml para mika 0.1 N NaBrO solution.