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11 Nov 2019
ntucky- CHE 113 Lab- Spring18-FRENCH> Activities and Due Dates Pre-Lab 15 o 3/5/2018 05:00 PM 0 5.8/10ã2/27/2018 07:43 PM å¾--adebook Print Caluetor Periodic Table Question 8 of 10 Treatment of ammonia with phenol in the presence of hypochlorite yields indophenol, a blue product absorbing light at 625 nm, which can be used for the spectrophotormetric determination of ammonia. ndophenol anion To determine the ammonia concentration in a sample of lake water, you mix 10.0 mL of lake water with 5 mL of phenol solution and 2 mL of sodiun hypochlorite solution and dilute to 25.0 mL in a volumetric flask (sample A). To a secand 10.0 mL solution of lake water you add 5 ml of phenol, 2 mL of sodium hypochlorite, and 2.50 mL of a 5.50 10 M ammonia solution and dilute to 25.0 mL (sample B). As a reagent blank, you mix 10.0 mL of distilled water with 5 mL of phenol, 2 mL of sodium hypochlorite and dilute to 250 miL. (sample C) You measure the following absorbances using a 1.00 cm auvet Sample Absorbance (625 nm) 0.369 0616 0 045 What is the molar absorptivity (e) of the indophenol product, and what is the concentration of ammonia in the lake water? Number Number NH ãProvous ®Gve Up & View solaen 9Check Answer âNext Exit , about us careers privacy poulcy terms of use contact us help MacBook Air F2
ntucky- CHE 113 Lab- Spring18-FRENCH> Activities and Due Dates Pre-Lab 15 o 3/5/2018 05:00 PM 0 5.8/10ã2/27/2018 07:43 PM å¾--adebook Print Caluetor Periodic Table Question 8 of 10 Treatment of ammonia with phenol in the presence of hypochlorite yields indophenol, a blue product absorbing light at 625 nm, which can be used for the spectrophotormetric determination of ammonia. ndophenol anion To determine the ammonia concentration in a sample of lake water, you mix 10.0 mL of lake water with 5 mL of phenol solution and 2 mL of sodiun hypochlorite solution and dilute to 25.0 mL in a volumetric flask (sample A). To a secand 10.0 mL solution of lake water you add 5 ml of phenol, 2 mL of sodium hypochlorite, and 2.50 mL of a 5.50 10 M ammonia solution and dilute to 25.0 mL (sample B). As a reagent blank, you mix 10.0 mL of distilled water with 5 mL of phenol, 2 mL of sodium hypochlorite and dilute to 250 miL. (sample C) You measure the following absorbances using a 1.00 cm auvet Sample Absorbance (625 nm) 0.369 0616 0 045 What is the molar absorptivity (e) of the indophenol product, and what is the concentration of ammonia in the lake water? Number Number NH ãProvous ®Gve Up & View solaen 9Check Answer âNext Exit , about us careers privacy poulcy terms of use contact us help MacBook Air F2
Jarrod RobelLv2
11 Nov 2019