midterm graphing examples solution

midterm graphing examples solution - The concentration of a...

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time, s C (mol/L) 0.0 0.1 3.2 0.09 6.2 0.08 10.0 0.06 18.3 0.04 30.8 0.02 43.8 0.01 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0 0.02 0.04 0.06 0.08 0.1 0.12 f(x) = 0.11·0.95^x R² = 1 Concentration vs. time time, s Concentration, mol/L The concentration of a reacting compound was observed. This is known to be reaction which follows the form: C = Co e^-kt where Co is a constant and k is constant for the reaction. Determine the rate constant for this reaction. From C = 0 so, k

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0 35.0 40.0 45.0 50.0 me a 2nd order s the rate m Excel's equation, 0.11 e^-0.05t = 0.05s^-1
time,t (s) C (mol/L) 1/C (L/mol) 0 0.0100 100.0 50 0.0079 126.6 100 0.0065 153.8 200 0.0048 208.3 300 0.0038 263.2 The concentration of a reacting compound was observed. This is known to be a 2nd order reaction which follows the form: 1/C = 1/Co + kt where Co is the concentration at t=0 and k is the rate constant for the reaction. Determine the rate constant for this reaction. 0 50 100 150 200 250 300 0.0 50.0 100.0 150.0 200.0 250.0 300.0 f(x) = 0.54x + 99.61 R² = 1 (Inverse of Concentration) vs. Time time, s 1/C, L/mol From trendline equation, 1/C = 1/(0.01) + 0.54 t Rate constant: k = 0.54 L/(mol*s)

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Check Co term: 1/99.605 = 0.01 Significant digits → 0.0100mol/L = Concentration at t=0 350
time, s voltage, V 0.0 100 0.5 62 1.0

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