Experiment # 9Flame Test

1.) Give the half reactions for the reduction of the metal cations.

Cu2+ + 2e- Cu

Ca2+ + 2e- Ca

Na+ + e- Na

Ba2+ + 2e- Ba

K+ + e- K

2.) Write the electronic configuration of Cu2+, Ca2+, Na+, Ba2+, and K+.

Cu2+ - 1s2 2s2 2p6 3s2 3p6 3d9

Ca2+ - 1s2 2s2 2p6 3s2 3p6

Na+ - 1s2 2s2 2p6

Ba2+ - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6

K+ - 1s2 2s2 2p6 3s2 3p6