For the given equation [Co(H2O)6] 2+ (aq) + 4Cl- (aq) [CoCl4] 2- + 6H2O(l) Take an aliquot of the 0.05 M CoCl2·6H2O solution that is in 6.0 M HCl. Use the UV-visible spectrophotometer to record the absorbance spectrum of the equilibrium mixture between 400 and 800 nm. Temperature Absorbance Concentration 10 0.66 0.00144 20 0.96 0.00166 30 1.34 0.00232 40 2.21 0.00400 1-How was the [ ] calculated? 2-Calculate K at 20OC . 3-Calculate ∆G0 at the same temperature. 4-Explain how to determine ∆H0 and ∆S0 experimentally.

As you go across each period from left to right the outer shell gradually becomes filled with electrons. the outer shell contains just one electron on the left hand side of the table, but is filled by the time you get to the right hand side.moving  down each group, you can see that  the number of electrons in the outermost shell is the same as the group number number.each element in a group therefore has the same number of electrons in its outer shell.i hope it you!