Construct a curve for the titration of 20.00 mL 0.0500 N succinic acid (HO2CCH2CH2CO2H) by 0.1000 N NaOH solution. MS Excel® can be used. Titrant volumes: 15.00 mL, 20.00 mL, and 25.00 mL. (CH2)2(CO2H)2 ⇌ (CH2)2(CO2H)(CO2)^− + H^+ Ka1 = 6.21 × 10^-5; pKa1 = 4.207 (CH2)2(CO2H)(CO2)− ⇌ (CH2)2(CO2)2^2− + H^+ Ka2 = 2.31 × 10^-6; pKa2 = 5.636

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What is the pH of the buffer that results when 2.3 g of NH3 and 6.46 g of NH4Cl are dissolved in 250 mL water? (Ka for NH4+ = 5.60 × 10-10) Please give the answer to 2 decimal places.

The pH of a saturated solution of metal hydroxide, Me(OH)2, is 12.4 at room temperature.  Calculate the Ksp for the compound.  Round off your answer to 3 sig. figs. Reaction: Me(OH)2 ↔ Me2+ + 2 OH-.

A 75.0-mL volume of 0.200 mol L-1 NH3 (Kp = 1.8 × 10-5) is titrated with 0.500 mol L' HNO3. Calculate the pH after the addition of 13.0 mL of HNO3. Express your answer numerically. • View Available Hint(s) να ΑΣΦ pH

Consider the titration of 110.0 mL analyte solution containing 0.12 mol L-1 NH3 with 0.30 mol L-1 HCl titrant. Determine the pH of the solution after adding 27.0 mL of titrant. (K(NH3) = 1.8 x 10-5, T = 25°C) Your Answer:

End Points in Strong-Base Titration of Mixed Strong Monoprotic and Weak Polyprotic Acids 1.39×10-2; ka2 = 6.73×10−8) is titrated A mixed aqueous solution of HCl and sulfurous acid (H₂SO3; Kal with 0.1000-M NaOH. The first end point (ethyl orange indicator) is reached after 38.91 mL of NaOH has been added. The second end point (thymolphthalein indicator) is reached after a total of 54.79 mL of NaOH has been added. What quantity of HCI (units of mol or mmol) was present in the initial mixture? 2.303 mol Submit Answer Incorrect. Tries 2/5 Previous Tries What quantity of sulfurous acid (units of mol or mmol) was present in the initial mixture? 1.59 mol

For different enzymes, there is an optimum pH at which the enzyme is most active. For example, for enzymes of gastric juice optimum pH 1-2, for duodenal enzymes pH 7.7, for liver enzymes pH 9.5, etc. Determine which medium (a or b) is most favorable for each of the enzymes mentioned above if the following substances are added to 1.0 liter of water: a) 0.040 mol KOH and 0.030 mol HBr; b) 4.0 10-9 mol HNO3. Neglect the change in the volume of the solution. Confirm your answer with calculations.

A patient presents itself to the emergency department in a critical condition. The patient’s blood was tested and the concentration of carbonic acid (H2CO3) was found to be 6.8 ×10-8 M    and bicarbonate ion (HCO3-)  2.325 ×10-7 M                                                                              Ka = 4.3 × 10-7                  H2CO3(aq)  ⇌  HCO3-(aq) + H+(aq) Show all calculations including equation(s) used. Calculate the pH of the patients’ blood. Based on your answer would you say the patient is suffering from Acidosis or Alkalosis?

PbBr2 6.3 × 10-6