consider a titration of 742 ml of 2.07 M Nitrous acid HNO2 Ka=4.0x10-4 by 2.27 M KOH for the next five questions
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We're going to titrate nitrous acid (HNO2) with the strong base NaOH and follow its titration curve. There is initially 100 mL of 0.50 M nitrous acid and the concentration of NaOH is 1.0 M. All work must be shown to receive credit. The Ka of HNO2 is 4.6 × 10^-4 and the pKa is 3.34. a. What is the initial pH of the nitrous acid solution? b. What is the percent ionization under initial conditions? c. After the addition of 10 mL of NaOH, what is the pH? d. After the addition of 25 mL of NaOH, what is the pH? Think about where in the titration this brings you. e. What volume of NaOH is required to reach the equivalence point? f. What is the pOH at the equivalence point? g. What is the pH at the equivalence point? h. What is the pH after adding 100 mL of NaOH? i. If, instead of NaOH being added, 0.05 moles of HCl(g) is added by bubbling the gas through the original solution of nitrous acid. Assume that the volume has not changed. Use [NO2^-]eq instead of [H3O+]eq for the calculation. What is the percent dissociation of nitrous acid?
Aarya B.
Consider the following titration for these three questions: 1.00 L of 4.00 M HNO3 is titrated with 3.00 M KOH. How many moles of acid are equal to one equivalent in this titration? How many moles of HNO3 are found in solution at the halfway point of the titration? How many liters of base will be needed to reach the equivalence point of the titration?
Madhur L.
We're going to titrate nitrous acid (HNO2) with the strong base NaOH, and follow its titration curve. There is initially 100. mL of 0.50 M nitrous acid and the concentration of NaOH is 1.0 M. All work must be shown to receive credit. The Ka of HNO2 is 4.6 x 10-4; pKa is 3.34. a. What is the initial pH of the nitrous acid solution? b. What is the percent ionization under initial conditions? c. After the addition of 10 mL of NaOH, what is the pH? d. After the addition of 25 mL of NaOH, what is the pH? Think about where in the titration this brings you.
Adi S.
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