Textbook assignment: Read Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 4: Sections 6 to 8.
4.6 pH. If you don't remember how to use logarithms and exponents, review Appendix A, section 1 of the text. The pH notation is simply a shorthand way to write the exponent of the concentration of the the H+ molecule in a solution.
4.7 Reactions in Aqueous Solution. Are there any serious differences between determining masses from moles or moles from masses for aqueous solutions and for non-aqueous solutions? Be sure that you understand the point of doing titrations, and the functions of indicators in determining a solution concentration.
4.8 Spectrophotometry. Light is the energy emitted by electrons as they jump between orbitals or energy levels within an atom or molecule. Light absorption, then, is a measure of the number of electrons available to grab light as it passes through a solution, so we can use absorption, color, and path length (penetration into a solution) to measure the concentration of a solution precisely.
|pH from Concentration||[H3O+]: Concentration of hydronium ion (molarity)|
|Concentration from pH|
ε: molar absorptivity for substance at given temperature and wavelength
l: path length
c: concentration (molarity)
Read the following weblecture before chat: Chemical Analysis: Measuring Concentrations
Review the Videos at Thinkwell Video Lessons under ACIDS and BASES / REACTIONS IN AQUEOUS SOLUTIONS
You may also find using this PHET pH Scale interactive experience useful. Try operating it in all three modes.
Complete and post your formal report.
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