Using your own lab-obtained data, what was your calculated Kc in water?
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Run Absorbance 0.151 0.116 0.192 0.114 0.148 Q4. Calculate the Kf for each Run. (Remember to show the setup for the first calculation: Full ICE Table) Q5. You will use the Q-test, show your setup, to determine if your data has any outliers (could be your highest or lowest) Q-Test is Q = (Deviant-closest value) / (highest value-lowest value) : Deviant is the value FARTHEST from the average If Q =< Q-90 value for the number values then the Deviant is a GOOD value, if Q > Q-90 value, then Deviant is an Outlier and removed from average. If one of your Kf values is an outlier then repeat the Q-test with your four values. You keep repeating until either you have no more outliers or only two values. Q-90 Table Q-90 Number of Data Points 0.94 3 0.76 4 0.64 5
Sri K.
Calculate the value for Kc.
George B.
To start, let's create a reference point for our data. Use Table 2 to find the appropriate Kw below that is valid at your experimental temperature. Use that Kw to calculate the theoretical pH of the solution. Table 2. Literature data T (°C) | Kw | pKw 20 | 0.68 x 10^-14 | 14.17 23 | 0.88 x 10^-14 | 14.06 25 | 1.01 x 10^-14 | 14.00 Based on your measured pH of 0.10 M NaOH from step 7 of the Procedure, what is the hydronium ion concentration? [H3O+] = ______ M Calculate an experimental value for Kw from your experimental value of the measured hydronium ion concentration and the known OH- concentration of the 0.10 M NaOH. Then calculate an experimental pKw value. Recall that strong bases dissociate completely in solution, thus in a 0.10 M NaOH solution, [OH-] = 0.10 M. Kw = [H3O+][OH-] = ______ pKw = -log Kw = ______ Compare your results with that taken from the literature (Table 2). Kw varies with temperature. However, at a given temperature Kw is a constant for an aqueous solution. This means that at 25°C in any aqueous solution, regardless of solute, the value of (Kw = [H3O+][OH-]) is 1.01 x 10^-14. What is the pH of pure water based on your experimental Kw?
Madhur L.
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