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The UV/Vis spectra provided are recorded for 0.15 M solutions of Co(II) and Ni(II). Calculate the...

The UV/Vis spectra provided are recorded for 0.15 M solutions of Co(II) and Ni(II). Calculate the mass of CoCl2.6H2O which would be dissolved in 250 cm3 of water to produce a 0.15 M solution. Would you expect the mass of NiCl2.6H2O required for the equivalent solution to be significantly different, and why?

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Answer #1

104.690 Molar mass af mass = 58.93x17 35.5x2 + 6x 18 = 237.93 g/mol lam²=lud so 250 un = 250ml Molarity = 0.15 Molarity = noMolar mass of Nich. 60 = 58.69x1 + 35.5x276x1K = 237.69 since the molas mass of Nil.64,0 is nearly same the mass of Nich. 67,

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