Message Board...

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Posted by dcox at 12:58 on Wednesday March 10, 2010.

still with hexaaquochromium(II)

This is the speedwell; which also looks good on frogeye Sprites! The ion also resembles this colour too...

Posted by dcox at 11:58 on Wednesday March 3, 2010.

Colour in TM ions

When a TM ion is dissolved in water it will form a hexaaquo complex ion. Six water molecules acting as lizards will form dative bonds to suitable receptor orbitals on the cation. This has an effect on the energies of...

Posted by dcox at 11:57 on Wednesday March 3, 2010.

Buffers

Solns of KNOWN pH that RESIST CHANGES in ph casued by addition of SMALL amounts of acid or alkali. I have stressed the important words to use.......

Posted by dcox at 11:53 on Wednesday March 3, 2010.

pH of alkaline solutions

Remember that pH is defined in terms of the concentration of hydrogen ions in the aqueous solution. If a solution contains a strong alkali [such as KOH] the concentration of hydroxide ions will be the same as that of the...

Posted by dcox at 11:52 on Wednesday March 3, 2010.

some thoughts on buffers..

Weak acids are because in aqueous solutions the solute species undergoes only very limited or partial ionisation into its conjugate base and the H3O+ ion. Due to the very low standing concentration of the conjugate base, these solutions cannot function...

Posted by dcox at 11:51 on Wednesday March 3, 2010.