Sketch the titration curve for the titration of 90. mL of 0.40 MA (Kb = 4.1x107) with a 0.40 M HCI. (Do this on paper. Your instructor may ask you to turn in this work.) What are the initial pH, the pH at the midpoint of the titration, and the pH at the equivalence point? (See the appendix.) initial pH 10.61 ✓ midpoint pH equivalence point pH 7.61 10.46 x

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MISSED THIS? Read Section 18.4 (Page); Watch KCV 18.4B. Consider the curve shown here for the titration of a weak monoprotic acid with a strong base. Hd 14 12 10 8 6420 80 120 160 40 Volume of base added (mL) The figure shows pH as a function of volume of base added. The pH is measured from 0 to 14 on the y-axis, while the volume of base added is measured from 0 to 160 milliliters on the x-axis. The curve of the plot goes up gradually from pH 2.3 at 0 milliliters to pH 5.8 at 49 milliliters, next the plot goes up steeply to pH 11.8 at 51 milliliters, and finally the plot goes up gradually to pH 12.2 at 160 milliliters. ✓ Correct An equilibrium problem based on the initial concentration and Ka of a weak acid should be solved for aqueous solution of the weak acid. This is true for the initial state of titration, when no base has been addition of a small amount of a strong base turns this solution into a buffer whose pH is calculated in way. Part D At what volume of added base does pH =…

Calculate the pH for each of the cases in the titration of 25.0 mL of 0.110 M pyridine, C₁H₁N(aq) with 0.110 M HBr(aq). The Kb of pyridine is 1.7 x 10-⁹. before addition of any HBr pH = after addition of 12.5 mL of HBr after addition of 16.0 mL of HBr after addition of 25.0 mL of HBr after addition of 35.0 mL of HBr 9.31 pH = pH = pH = pH = 5.23 4.63 Incorrect 11.65 Incorrect 1.33 Incorrect

12.0 10.0 8.0 A pH 6.0 4.0 2.0 0.0 C 0 5 10 15 20 25 30 mL of 0.1 M NaOH The graph above shows the titration curves of four monoprotic acids of varying strengths. All of the acids start out at 0.1 M concentration and 25.0 mL volume. Choose all of the correct statements about these titration curves from the choices below. The titration curve labelled "D" is generated by the strongest acid in the series. In the curves shown above the stronger the acid the less NaOH required for neutralization. The stronger the acid the more important is the pKa of the Indicator used for titration. The Ka of the acid which generates curve "C" is about 103 The weaker the acid the lower the pH of the neutralization point. The acid which generates curve "D" has the highest neutralization-point pH in the series.

12.0 10.0 8.0 pH 6.0 4.0 D 2.0 0.0 O 5 10 15 20 25 30 mL of 0.1 M NAOH The graph above shows the titration curves of four monoprotic acids of varying strengths. All of the acids start out at 0.1 M concentration and 25.0 mL volume. Choose all of the correct statements about these titration curves from the choices below. O The titration curve labelled "D" is generated by the strongest acid in the series. O The pk, of the conjugate base of the acid which generates curve "B" is about 6. O The Ka of the acid which generates curve "A" is about 10-5. O Titrating the acid in curve "A" requires the most acidic indicator in the series. O The Ka of the acid which generates curve "B" is about 10-6, The stronger the acid the higher its pH value at the beginning of the titration.

Consider the titration of 50.00 mL of 0.100 M hypochlorus acid (HClO) with 0.200 M KOH, calculate the pH after adding 0.00 mL of KOH. Ka for HClO = 3.0 x 10-8. Group of answer choices 1.00 2.87 4.26 2.30

Determine the pH during the titration of 60.4 mL of 0.442 M formic acid (Ka = 1.8×10-4) by 0.442 M KOH at the following points.   At the equivalence point (e) After the addition of 90.6 mL of KOH