Answer in Organic Chemistry for Aartee #120516
April 21st, 2023
Solution.
“[Co(C2O4)2(NH3)2]^{2-}”
M(complex) = 269 g/mol
“n(complex) = frac{m}{M}”
n(complex) = 0.2 mol
“E(J/mol) = frac{55000}{0.2} = 275000 frac{J}{mol}”
“E = frac{h times c}{lambda} = frac{Na times h times c}{lambda}”
“lambda = frac{Na times h times c}{E}”
“lambda = frac{6.022*10^{23} times 6.626*10^{-34} times3*10^8}{275000} = 4.35 times 10^{-7} = 435 nm”
Since the absorption of light by the complex occurs at a wavelength of 435 nm, an additional color that determines the color of the solution will be yellow.
Answer:
yellow.
