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  1. B

    Absorption with UV/VIS spectrometer

    Only at low concentrations is the relation between concentration and absorption linear. Thus, in order to calculate with any precision the concentration (using the Beer-Lambert law), a dilute solution must be used.
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    Reaction between Copper, Hydrogen Peroxide, and Vinegar

    Thanks for your response, NascentOxygen! No gas is evolved by the mixture of these two solutions. This is difficult to distinguish; during the entire reaction (as the solution goes from clear to deep blue), gas appears to form on or near the metallic copper. However, after several hours, gas...
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    Reaction between Copper, Hydrogen Peroxide, and Vinegar

    Hey there PF, I'm trying to determine the reaction equation for a little home experiment I've been conducting. The setup is very minimal: copper metal in a solution of 3% H2O2 and 5% CH3COOH. In reality, I'm probably missing something fairly straightforward. The reaction occurs very...
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