The calcium content of a calcium dietary supplement needs to be deduced after it is dissolved in excess HCl and titrated with NaOH. Concept introduction: Titration is a method of quantitative analysis which is used to determine the concentration of unknown solutions. A titrant of known concentration is added to an analyte of known volume in the presence of a suitable indicator until the equivalence point is reached which is indicated by a change in the color of the analyte. In a titration, equivalence point is the point at which the amount of titrant added is just sufficient to neutralize the amount of analyte taken. Concentration of a solution is expressed in terms of molarity which is the ratio of the moles of solute divided by the volume of the solution in liters. Molarity = Moles of solute Volume of solution (liters) − − − − ( 1 )

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Chapter 5, Problem 85IAE

Interpretation Introduction

Interpretation:

The calcium content of a calcium dietary supplement needs to be deduced after it is dissolved in excess HCl and titrated with NaOH.

Concept introduction:

Titration is a method of quantitative analysis which is used to determine the concentration of unknown solutions. A titrant of known concentration is added to an analyte of known volume in the presence of a suitable indicator until the equivalence point is reached which is indicated by a change in the color of the analyte.

In a titration, equivalence point is the point at which the amount of titrant added is just sufficient to neutralize the amount of analyte taken.

Concentration of a solution is expressed in terms of molarity which is the ratio of the moles of solute divided by the volume of the solution in liters.

Molarity = Moles of soluteVolume of solution (liters)−−−−(1)

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