# Recording data from a Simulation

Data Recorded:Slide the tabs up/down and record data from the Simulation for 15data points representing the pH range from -1 to 15. Only five of the values can be for whole pH values(1.00 2.00 etc.).Record: Concentration of hydronium ion [H3O+] pH of the solution Results (require calculations): Your calculated concentration of Hydronium [H3O+] ([H3O+]=10-pH) Compare your calculated values vs.the values values from the simulation for each point. Using Excel create a graph of pH versus [H3O+] fit the plot using the built-in exponential function. Explain how the Excel exponential fitting equation from base â€œeâ€ relates to the definition of pH=-log[H3O+]. Examine the trend of relative percent difference as a function of pH and discuss the role of the number of significant figures in this trend. Table 5. pH and concentration of H3O+ from simulation and calculated RPD between simulation and calculated concentration of H3O+ Simulation Calculated pH [H3O+] (M) [H3O+] (M) RPD -0.32 2.10E+00 2.09E+00 0.51% 0.52 3.10E-01 3.02E-01 2.62% 1.12 7.70E-02 7.59E-02 1.49% 2.05 9.00E-03 8.91E-03 0.98% 3.45 3.50E-04 3.55E-04 1.37% 4.31 4.90E-05 4.90E-05 0.05% 5.00 1.00E-05 1.00E-05 0.00% 6.22 6.10E-07 6.03E-07 1.23% 7.13 7.40E-08 7.41E-08 0.18% 8.62 2.40E-09 2.40E-09 0.05% 9.12 7.60E-10 7.59E-10 0.19% 10.37 4.30E-11 4.27E-11 0.80% 11.82 1.50E-12 1.51E-12 0.90% 12.49 3.30E-13 3.24E-13 1.96% 13.21 6.10E-14 6.17E-14 1.08% 14.74 1.80E-15 1.82E-15 1.09%

Requirements: long enough | .xls file

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