Category Archives: Quantitative Analysis

An Inexpensive Electrodeposition Device and Its Use in a Quantitative Analysis Laboratory Exercise

This experiment describes the construction of a simple apparatus for effecting the electrodeposition of nickel onto a tared copper electrode. Results are compared to the determination of nickel by the classical gravimetric precipitation of the dimethylglyoxime complex. The full citation … Continue reading

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How Much Cranberry Juice is in Cranberry-Apple Juice?

Students determine the amount of cranberry juice (as a volume percent) in mixtures of cranberry juice and apple juice by measuring the absorption of mixtures and comparing to a calibration curve prepared for cranberry juice. The experiment assumes that the … Continue reading

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Leeching of Silver from Silver-Impregnated Food Storage Containers

Food storage containers may contain micro-particles of Ag, which serves as an anti-microbial agent to limit the growth of molds, fungi, and other microorganisms. Students study the leeching ability of three solvents — deionized water, tap water, and acetic acid … Continue reading

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Using a Flatbed Scanner to Measure Detergency

Using a flatbed scanner to measure the reflectance from samples of a white polyester fabric impregnated with linseed oil, students determine detergent efficiency. Scans of samples are stored as RGB (red, green, blue) coordinates and the blue channel used as … Continue reading

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Laboratory Inquiry for Determining the Chemical Composition of a Component in a Laboratory Detergent

Students determine the concentration of sodium sesquicarbonate in an alkaline laundry detergent though a combination of an acid-base titration and thermal gravimetry, both of the thermal decomposition and the decomposition by reaction with acid. The full citation is here: Koga, … Continue reading

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The Shell Seeker: What is the Quantity of Shell in the Lido di Venezia Sand? A Calibration DRIFTS Experiment

This experiment uses a novel approach to introduce students to the method of standard additions. To approximate the contribution of shell fragments in sand collected from a beach (in this case, from the seashore at Lido di Venezia, Italy). After … Continue reading

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Have Biofuel, Will Travel: A Colorful Experiment and a Different Approach to Teach the Undergraduate Laboratory

This experiment describes a  quantitative UV-Vis analysis of mixtures of diesel/ethanol and diesel/biofuel based on the absorption of a solvochromatic probe dye. Students first synthesize the dye and then monitor the change in the dye’s λmax for different known mixtures, … Continue reading

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Quantitative Investigations of Biodiesel Fuel

In this experiment students complete four tasks: monitoring the production of biodiesel by a transesterification of a commercial oil; quantifying mixtures of biodiesel and petroleum-based diesel; using a Karl-Fisher titration to determine the impact of water on the quantification of … Continue reading

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What if There is no Quantitative Analysis Course?

What happens if an institution does not have a quantitative analysis course? Where are  students introduced to the concepts of analytical chemistry and the importance of analytical measurements? This post describes how one institution approached this when the needs of … Continue reading

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