Iodide And Chloride Lab Report

The halides in unknown solution were identified as iodide and chloride based on their experimental E°(Ag/AgX) values, -0.16 ±0.01V and 0.22 ±0.02V respectively. These results were both accurate with percent error of 5.96% for iodine and 0.9% for chloride. The literature value of E°(Ag/AgI) and E°(Ag/AgCl) were -0.151V and 0.222V respectively (1). In addition, the literature vales lay within the 95% confidence interval for both halides therefore the results were accurate. These results were precise with standard deviation of ±0.0050V and ±0.011V respectively. Experimental value of initial concentration for halides were 0.0611 ±0.003 M and 0.113 ±0.001M respectively. The 95% confidence interval for these measurements were narrow, which indicates the true mean of these values will lie within these interval, accounting for accuracy.
The experimental measurement for initial concentration of each halide were precise with relative standard deviation of 2.1% and 0.42% respectively. The halide in seawater sample was identified as chloride based on their experimental E°(Ag/AgX) value of 0.22 ±0.02V. The literature value of 0.222V lay between its 95% confidence interval accounting for accuracy (1). The result was accurate and precise with percent error of 0.9% and relative standard deviation of 0.14%. The concentration of chloride in seawater was calculated as 0.515 ± 0.002 M of chloride. Based on the literature value for chloride concentration in seawater of 0.546M, the percent error in concentration was calculated as 5.7% (2). The relative standard deviation of 2.1% showed that the experimental measurement was