To achieve the desired Ni/Zn molar proportions of 1%, 3%, and 5% using 1M NiAc and ZnAc solutions, the calculations must reflect the correct ratios of the two components. For a 1% ratio, the calculation suggests using a total of 5 mmol of the mixture, resulting in 0.05 mmol of Ni and 4.95 mmol of Zn. However, this approach leads to a solution that does not maintain the original 1M concentration of Zn, thus failing to meet the requirement for a 1% molar proportion accurately. The correct method is to mix the solutions in a straightforward ratio based on the desired proportion. For a 1% ratio, mix the solutions in a 100:1 ratio, ensuring that the final concentrations are consistent with the original molarities. This principle applies similarly for the 3% and 5% ratios, where the mixing should reflect the specified proportions without altering the initial concentrations significantly.
