Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- Which of the following is true of a buffer solution that contains equivalent amounts of acid and conjugate base? The pH will always be greater than 7, regardless of the acid and conjugate base. The pH of the solution will be equal to the pKa of the acid. The pH of the solution will be equal to Kw. The pH will be equal to the concentration of the conjugate base. The pH will be equal to the concentration of the acid.arrow_forwardCalculate the number of equivalents of antacid per gram of tablet.Determine the cost per equivalent of antacid (pesos/eq). Show the complete solution and write thoroughly in a clean paper Data: MAALOX TABLET 10PHP (10 pesos) per tablet 200 mg 0.7g (mass of antacid sample for testing) 60mL (volume of HCL added) 0.10M (concentration of standard HCl) 20 mL (volume of NaOH used) O.15M (concentration of standaard NAOH)arrow_forwardPart 3 Prepare a data table for the titration of NaOH with diluted vinegar. Include enough data columns for at least 3 titrations. PRELAB QUESTIONS 1. Calculate the molar mass of Potassium acid phthalate, KHC8H404 (KHP). You will use this number to do the calculations for part 1 once you do the titration. 2. Calculate the molar mass of acetic acid, HC₂H3O2. You will use this number to do the calculations for part 3 once you do the titration. 3. Solve the following problem: If it takes 35.04 mL of a 0.2455 M NaOH solution to neutralize 25.00 mL of an unknown HCl solution, what is the molarity of the HCl solution? Use the roadmap given under part 2 to calculate this problem. MA Chemistry 60 lab Page 110 3arrow_forward
- 1.) HA is a weak acid. Its ionization constant, Ka, is 3.1 x 10-13. Calculate the pH of an aqueous solution with an initial NaA concentration of 0.061 M. 2.) We place 0.149 mol of a weak acid, HA, in enough water to produce 1.00 L of solution. The final pH of the solution is 1.11 . Calculate the ionization contant, Ka, of HA. 3.)We place 0.527 mol of a weak acid, HA, and 12.0 g of NaOH in enough water to produce 1.00 L of solution. The final pH of this solution is 4.35 . Calculate the ionization constant, Ka, of HA.arrow_forwardCalculate the pH of the solution that results when 15.0 mL of 0.1600 M lactic acid (Ka(CH3 CHOHCOOH) = 1.38 × 10 : 10-4) is a. diluted to 55.0 mL with distilled water. pH = b. mixed with 40.0 mL of 0.0600 M NaOH solution. pH = c. mixed with 40.0 mL of 0.120 M NaOH solution. pH = d. mixed with 40.0 mL of 0.120 M sodium lactate solution. pH =arrow_forward`What products are yielded in nearly every acid/base neutralization reaction? salt and carbon dioxide water and salt carbon dioxide and water Oil and water or none of thesearrow_forward
- HO -OH Oxalic Acid, H₂C₂O₁ PK₁₁ = 1.27 pka2 = 4.266 H₂Ox→ HOX → Ox ²- H₂A → HA → A²- pH = ? Adding 0.20 mole of NaOH to 0.40 mole of NaHC₂O4 (s) with total volume of 500 mL. pH = ? 150 g of NaHC₂O4 (s) dissolved in DI water total volume of 500 mL. pH = ? Adding 0.20 mole of HCI to 0.40 mole of NaHC₂O4 (s) with total volume of 500 mL. pH = ? 0.40 Adding 0.20 mole of HCI mole of Na₂C₂O4 (s) with total volume of 500 mL. pH = ? Adding 0.40 mole of HCI to 0.40 mole of Na₂C₂O4 (s) with total volume of 500 mL. pH = ? Important Key Concept Exercisearrow_forwardWhat is the ratio of bicarbonate ion to carbonic acid ([HCO−3]/[H2CO3])([HCO3−]/[H2CO3]) in blood serum that has a pHpH of 7.40? Express your answer using three significant figures.arrow_forwardAn HCl solution has a concentration of 0.09714 M. Then 10.00 mL of this solution was then diluted to 250.00 mL in a volumetric flask. The diluted solution was then used to titrate 250.0 mL of a saturated AgOH solution using methyl orange indicator to reach the endpoint. 1. What is the concentration of the diluted HCl solution? 2. If 7.93 mL of the diluted HCl solution was required to reach the endpoint, what is the concentration of OH− in solution? 3. What is the concentration of Ag+ in solution?arrow_forward
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