CHE 113 Lab-Spring18-FRENCH Activities and Due Dates Pre-Lab 15 /2018 05:00 PM A 6.9/10 Grad Print CalculatorPeriodic Table n 8 of 10 Treatment of ammonia with phenol in the presence of hypochlorite yields indophenol, a blue product Map absorbing light at 625 nm, which can be used for the spectrophotometric determination of amimonia. OCI indophenol anion o determine the ammonia concentration in a sample of lake water, you mix 10.0 mL of lake water with mL of phenol solution and 2 mL of sodium hypochlorite solution and dilute to 25.0 mL in a volurnetric flask (sample A). To a second 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 x 104M 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 25.0 mL (sample C). You measure the following absorbances using a 1.00 cm cuvet Sample (625 nm) 0.443 0 690 0045 What is the molar absorptivity (e) of the indophenol product, and what is the concentration of ammonia in the lake water? Number Number NH lake water Previous Give Up & View Solution 9 Check Answer Ned Ext Hint about us careers privacy policy terms of use s