By Abbot C.G., Fowle F.E., Aldrich L.B.

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Extra resources for Confirmatory Experiments on the Value of the Solar Constant of Radiation

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Section . . . . . . . . Date . . . . . . . . Instructor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 E X P E R I M E N T 4 Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. A clean, dry porcelain crucible is weighed and the mass is recorded. A mixture containing NaHCO3 and KCl is added to the crucible and the crucible is reweighed.

4 E X P E R I M E N T 4 Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. A clean, dry porcelain crucible is weighed and the mass is recorded. A mixture containing NaHCO3 and KCl is added to the crucible and the crucible is reweighed. 2 NaHCO3ðsÞ ! 734 g The crucible and mixture are heated for 15 minutes, then allowed to cool to room temperature. The crucible and residue are weighed and the mass is recorded. 476 g The crucible and residue are reheated for 5 minutes, then allowed to cool to room temperature.

E XPERIMEN T 3 Chromatography OBJECTIVES To use paper chromatography to separate the dyes in colored ink markers and identify the transition metal ions present in an unknown solution of transition metal ions by paper chromatography. INTRODUCTION Many substances found in nature or synthesized in the laboratory are mixtures. Often chemists must separate the individual components of a mixture to identify and characterize each component. Chromatography is a technique in which a mobile phase (a gas or a liquid) carries the components of a mixture across a stationary phase (a solid or a liquid).

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Confirmatory Experiments on the Value of the Solar Constant of Radiation by Abbot C.G., Fowle F.E., Aldrich L.B.


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