Analytical Chemistry

Bronsted-Lowry Acid Strength: Ka and pKa

– In this subject, we will discuss the Bronsted-Lowry Acid Strength: Ka and pKa Bronsted-Lowry Acid Strength: Ka and pKa – Many organic reactions involve the transfer of a proton by an acid–base reaction. – An important consideration, therefore, is the relative strengths of compounds that could potentially act as …

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Solubility Product Ksp: Definition, Formula, Problems

– In this subject, we will discuss the Solubility Product (Ksp): Definition, Formula, Problems Solubility Product Constant Ksp – Most, but not all, sparingly soluble salts are essentially completely dissociated in a saturated aqueous solution. – For example, when an excess of barium iodate is equilibrated with water, the dissociation …

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Dilution of Solutions

– In this subject, we will discuss the Dilution of Solutions and Dilution Law. Dilution of Solutions – Concentrated solutions are often stored in the laboratory stockroom for use as needed. – Frequently we dilute these “stock” solutions before working with them.  – Dilution of solution is the procedure for …

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Chemical Stoichiometry: Definition, Formula, Examples

Chemical Stoichiometry: Definition, Formula, Examples

In this subject, we will discuss the Chemical Stoichiometry: Definition, Formula, Example Chemical Stoichiometry – Stoichiometry is the quantitative relationship among the amounts of reacting chemical species. – This subject provides a brief review of stoichiometry and its applications to chemical calculations. – The stoichiometry of a reaction is the …

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Safety in the laboratory

– In this subject, we will discuss the Safety in the laboratory Safety in The Laboratory – There is necessarily a degree of risk associated with any work in a chemical laboratory. – Accidents can and do happen. – Strict adherence to the following rules will go far toward preventing …

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The Laboratory Notebook

The Laboratory Notebook – A laboratory notebook is needed to record measurements and observations concerning an analysis. – The book should be permanently bound with consecutively numbered pages (if necessary, the pages should be hand-numbered before any entries are made). – Most notebooks have more than ample room, so there …

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Pipets : Overview, Uses, Function, Cleaning

Pipets – Pipets permit the transfer of accurately known volumes from one container to another. – Common types are shown in Figure (1), and information concerning their use is given in Table (1).  – A volumetric, or transfer, pipet (Figure 1a) delivers a single, fixed volume between 0.5 and 200 …

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Filtration and Ignition of Solids

– In this subject, we will discuss the Filtration and Ignition of Solids. – Several techniques and experimental arrangements allow solids to be filtered and ignited with minimal contamination and error. (1) Apparatus for Filtration of Solids (a) Simple Crucibles  – Simple crucibles serve only as containers. – Porcelain, aluminum …

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