The concentration of mercury in the given sample of well water is to be calculated and the water sample is safe or unsafe for human consumption is to be predicted. Concept Introduction: Water gets polluted due to the presence of various biological and chemical contaminants. Biological contaminants include microorganisms such as Giardia, Legionella while chemical contaminants are mercury, lead, benzene, trichloroethylene etc. Both these render water unfit for consumption by human beings and animals, if the contaminant exceeds a certain limit, termed as Maximum Contaminant Limit. The concentration of a contaminant is reported as the mass of contaminant (in milligrams) present in one liter of water. It is known that 1000 mL = 1 L , hence conversion factor of mm to L is as: 1000 mL 1 L Concentration of solute = Mass of solute Volume of solution

Question

ii) Molecular ion peak :the peak corresponding to the intact molecule (with a positive charge) What would the base peak and Molecular ion peaks when isobutane is subjected to Mass spectrometry? Draw the structures and write the molecular weights of the fragments. Circle most stable cation a) tert-butyl cation b) Isopropyl cation c) Ethyl cation. d) Methyl cation 6. What does a loss of 15 represent in Mass spectrum? a fragment of the molecule with a mass of 15 atomic mass units has been lost during the ionization Process 7. Write the isotopes and their % abundance of isotopes of i) Cl

Answer 1

Question

Chapter 12, Problem 47E

Interpretation Introduction

Interpretation:

The concentration of mercury in the given sample of well water is to be calculated and the water sample is safe or unsafe for human consumption is to be predicted.

Concept Introduction:

Water gets polluted due to the presence of various biological and chemical contaminants. Biological contaminants include microorganisms such as Giardia, Legionella while chemical contaminants are mercury, lead, benzene, trichloroethylene etc. Both these render water unfit for consumption by human beings and animals, if the contaminant exceeds a certain limit, termed as Maximum Contaminant Limit.

The concentration of a contaminant is reported as the mass of contaminant (in milligrams) present in one liter of water.

It is known that 1000 mL = 1 L, hence conversion factor of mm to L is as:

1000 mL1 L

Concentration of solute = Mass of soluteVolume of solution

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