FOUND.OF COLLEGE CHEMISTRY
FOUND.OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781119234555
Author: Hein
Publisher: WILEY
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Chapter 6, Problem 36AE

(a)

Interpretation Introduction

Interpretation:

The chemical formula of calcium carbonate has to be written and the possibility of concern caused by the spill has to be indicated.

(b)

Interpretation Introduction

Interpretation:

The chemical formula of acetic acid has to be written and the possibility of concern caused by the spill has to be indicated.

(c)

Interpretation Introduction

Interpretation:

The chemical formula of dihydrogen oxide has to be written and the possibility of concern caused by the spill has to be indicated.

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Calculate the mass percent of  C3H5OCO2H3  in the sample. Be sure your answer has the correct number of significant digits.
Treatment of ammonia with phenol in the presence of hypochlorite yields indophenol, a blue product that absrobs light at 625 nm, which can be used for the spectrophotometric determination of ammonia. ocr -OH • NH, indophenol anion To determine the ammonia concentration in a sample of lake water, three samples are prepared. In sample A, 10.0 mL of lake water is mixed with 5 mL of phenol solution and 2 mL of sodium hypochlorite solution, and diluted to 25.0 mL in a volumetric flask. In sample B, 10.0 mL of lake water is mixed with 5 mL. of phenol solution, 2 mL of sodium hypochlorite solution, and 2.50 mL of a 5.50 x 10-4 M ammonia solution, and diluted to 25.0 mL. Sample C is a reagent blank. It contains 10.0 mL of distilled water, 5 mL of phenol solution, and 2 ml. of sodium hypochlorite solution, diluted to 25.0 mL. The absorbance of the three samples is then measured at 625 nm in a 1.00 cm cuvette. The results are shown in the table. Sample Absorbance (625 nm) A 0.374 В 0.621 0.045…
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