CAS CH 171 Lecture 2: Pre-Lab December 5, 2016

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5 Dec 2016

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Titration- measurement of the volume of a standard solution required to completely react with a measured volume or mass of substance being analyzed (a. k. a. analyte) Standard solution- solution containing a known concentration of solute. Standardization- process of determining the concentration of a solution by using it to titrate a carefully measured quantity of a reference standard. Indicator- a substance added to an analyte solution in order to give an observable physical change (end point) at or near the equivalence point. Equivalence - the point at which an added titrant is stoichiometrically equal to the number of moles of analyte present in the sample. Normality- another way of expressing the concentration of a solution; it uses the alternative chemical unit of mass called equivalent weight. A titration curve provides a visual picture of how a property of the titration reaction changes as we add titrant to the analyte. All of a sudden see a big change.

Related Questions

Match each term below with its definition or description.

1 The point in a titration when the added amount of standard reagent is equal to the amount of analyte being titrated. 11) End Point

2 The analyte is titrated with the standard reagent and the volume of standard solution required to complete the reaction is measured. 12) Indicator

3 A reagent that is pure and stable, which can be used directly after weighing. 13) Direct Titration

4 The analyte that is being analyzed in the titration. 14) Back Titration

5 Standard reagent is added in excess to ensure complete reaction with the analyte. The excess reagent is then titrated with a second standard reagent. 15) Indirect Titration

6 A solution, whose concentration is known, often made from a reagent of known purity. 16) Primary Standard

7 The standard reagent of known concentration that is added from a buret to the analyte solution. 17) Standard Solution

8 The analyte does not react directly with the titrant so it is converted to another form which will react with the titrant. 18) Titrand

9 The point in a titration when a change in the analyte solution is observed, indicating equivalency. 19) Equivalence Point

10 It is added to the analyte solution and aids in the observation of the completion of the reaction. 20) Titrant

CAS CH 171 Lecture 2: Pre-Lab December 5, 2016

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