Transition Metal Complexes Colors

April 2, 2015

This site on chemguide gives examples and explains changes in solution color based on ligand identity around transition metal ions in complexes.

http://www.chemguide.co.uk/inorganic/complexions/colour.html

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Transition Metal Ion Colours

April 2, 2015

Chemistry blog Compound Interest overviews the color of first row transition metal ions in aqueous solutions. A brief explaination is provided for what gives these complexes the colors we perceive.

http://www.compoundchem.com/2014/03/05/colours-of-transition-metal-ions-in-aqueous-solution/

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Periodic Table Practice

April 2, 2015

Click here to practice testing your recall of the periodic table: http://periodic.co.nf/

The site provides one blank at a time in the periodic table for the user to complete. Elements of atomic number higher than radon are not quizzed but shown on the table for completion (lanthanides are also excluded).

A clock is given in the bottom corner for reference. Note the time you start to keep track of how much time it takes you to fill in several blanks. The site will track your number of correct and incorrect responses as you work.

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Hydrangeas and Inorganic Chemistry

March 9, 2015

The chemistry of hydrangea color change can be understood in the context of acid/base chemistry. Specifically inorganic chemistry explains the shift from red/pink to blue blooming flowers under acidic soil conditions. Do you know what is key to changing the color of these flowers?

HydrangeaColorpH

Prof. Henry Schreiber and his group studied and reported on hydrangea color change chemistry. To find out the key to hydrangea color change chemistry read the article in American Scientist which summarizes Schreiber’s findings: Curious Chemistry Guides Hydrangea Colors

For more details and specifics to the research see the references noted in the articles bibliography.

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Thermodynamics Quick Reference Guide

March 9, 2015

Download the below PDF document for a quick reference guide on thermodynamic properties used in calculations of enthalpy of reactions.

The following properties summarized: enthalpy of formation, ionization energy, electron affinity, bond dissociation energy, lattice enthalpy, enthalpy of vaporization, enthalpy of sublimation, enthalpy of fusion, enthalpy of atomization and enthalpy of combustion.

ThermoQuickReference

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Molecular Orbital Diagram Practice

February 15, 2015

University of Sydney has created a practice website for reviewing different parts of molecular orbital diagrams. Using this resource you can add pieces to pre-drawn MO diagrams for over 20 different molecules.

The site includes opportunities to practice filling in electrons, attaching the names/symbols of MOs, and matching orbital overlap drawings to MOs.

Give them a try here:

https://scilearn.sydney.edu.au/fychemistry/calculators/mo_diagrams.shtml

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Colour of Gemstones

February 11, 2015

Chemistry blog Compound Interest maps out a beautiful image on a variety of common gemstones and the inorganic components which contribute to their observed color.

http://www.compoundchem.com/2014/06/29/what-causes-the-colour-of-gemstones/

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