The following reaction (Keq = 1.8 × 10−5) starts with 0.100 M HC2H3O2, with all other aqueous species zero molar. What is the final concentration of H3O+? HC2H3O2(aq) + H2O(l) — H30+(aq) + C2H3O2(aq) H¸O±(aq)
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HC2H3O2, with all other aqueous species zero molar. What is the
final concentration of H3O+?
HC2H3O2(aq) + H2O(l) — H30+(aq) + C2H3O2(aq)
H¸O±(aq)"
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- The ionization constant of lactic acid, CH,CH(OH)CO,H, an acid found in the blood after strenuous exercise, is 1.36 x 10-4. What is the concentration of hydronium ion in the solution of 0.102 M lactic acid? CH;CH(OH)CO,H (aq) + H,O (1) → H;O• (aq) + CH;CH(OH)CO, (aq) O 0.00372 M O 0.0165 M O 0.00549 M O 0.227 MInformation given= Reaction #2: (K+(aq) + OH-(aq) + (H+)+(aq) + Cl-(aq) → K+(aq) + Cl-(aq) +H2O(l) Mass of empty cup in grams (tare mass) 1.764g Mass of cup+solution (g) 30.128g Temp of HCI solution in (c) 21 degree celsius Temp of KOH solution (c) 22 degree celsius Time (seconds) Temp ( in degrees celsius 30 24 60 24 90 24 120 24 150 24.5 180 24.5 Question 1: From the 6 or 7 initial temperatures collected, calculate the average ΔTi.The solvation of calcium carbonate in water is shown. CaCO3 (s) + H₂0¹ (aq) = Ca²+ (aq) + HCO3 (aq) + H₂O(1) Keq = 71 Use this information to compare the grams per liter solubility of CaCO3 in pure water, a H₂O+ (aq) solution with a pH of 3.00, and a H3O+ (aq) solution with a pH of 1.00. The Ksp for CaCO3 is 3.36 × 10-⁹ solubility in pure water: 5.805 X10-3 solubility in a solution with a pH of 3.00: solubility in a solution with a pH of 1.00: g/L g/L g/L
- A buffer solution made from nitrous acid and sodium nitrite was titrated with sodium hydroxide. What is the net ionic equation for the reaction?please answer only d and e in questionIn water, the equilibrium 2H2O(l) ⇄ H3O+(aq) + OH−(aq) Kc = 10-14 determines the concentrations of H3O+(aq) and OH−(aq). If the pH is 9.2, what is the OH− concentration? (H3O+(aq) and H+(aq) are equivalent ways of representing a solvated proton).
- In the following acid-base equilibria of weak acids in water, label the acid (A), the base (B), the conjugate acid (CA), and the conjugate base (CB). HCIO, (aq) + H,O(1) = H,O*(aq) + CI0, (aq) H,CO, (aq) + H,O1) – H;O*(aq) + HCO; (aq) Answer Bank H,O(1) + CH;NH†(aq) = CH,NH,(aq) + H;O*(aq) СА А B СВ CH, COOH(aq) + H,O(1) - CH;COO (aq) + H;O*(aq)The polyprotic acid, H3X, has acid dissociation constants Ka1 = 1.3×10-1, Ka2 = 6.5×10-4, and Ka3 = 3.3×10-5. What is the Kc value of the following reaction at 25°C?HX2−(aq)+OH−(aq)⇋X3−(aq)+H2O(l)HX2−(aq)+OH−(aq)⇋X3−(aq)+H2O(l)Report your answer to two significant figures using E notation.10. If 29.50 mL of 0.175 M nitrous acid neutralizes 50.0 ml. of harium hydroxide, what is the molarity of the base? 2HNO;(aq) + Ba(OH);(aq) Ba(NO:)(aq) + 2H;O(1)
- Human blood has a pH of approximately 7.4 due to the carbonic acid/bicarbonate ion (H2CO3/HCO3−) buffer system. Any pH changes below 6.8 or above 7.8 can lead to death! Carbonic acid dissociates to form water and carbon dioxide in the equilibrium shown below. This process is crucial in respiration. H2CO3 (aq) ⇋ CO2 (g) + H2O pKa1 = 2.77 Carbonic acid dissociates in water to form the bicarbonate ion and the hydroxonium ion by the following equilibrium reaction:H2CO3 (aq) + H2O ⇋ H3O(aq)+ + HCO3− pKa2 = 3.70 (i) If there is a 25% increase in carbonic acid levels as per pKa1, explain how the body would deal with this change.Brønsted-Lowry concept Brønsted-Lowry acids are substances that can donate a proton (H+) to another substance; Brønsted-Lowry bases are substances that can accept a proton (H+). A substance with transferable protons is an acid, such as HNO2 in this example: HNO2 (aq) + H20(1) = NO2 (aq) + H3O+ (aq) A substance that can receive a transferable proton is base, such as water in this example: HNO2 (aq) + H20(1) = NO, (aq) + H3O+ (aq) One benefit of the Brønsted-Lowry concept of acids and bases is that it is not limited to aqueous solutions and can be applied to gases, liquids, and solids. Part B Using the Brønsted-Lowry concept of acids and bases, identify the Brønsted-Lowry acid and base in each of the following reactions: H,PO3 (aq) + H20(1)→H,PO3 (aq) + OH (aq) CH,NH, (g) + BB13 (g)→CH,NH,BBr3 (s) Drag the appropriate items to their respective bins. • View Available Hint(s) Reset Help H,PO3 H20 CH,NH2 BB13 Brønsted-Lowry acid Brønsted-Lowry base Neither SubmitA chemical system is set up by placing some solid ammonium chloride in an ammonia solution. The equilibrium established can be represented as follows: NH4*(aq) + H2O(e) 2 H30*(aq) + NH3(aq) The pH of the solution is taken, then a small amount of NaOH(aq) is added and the pH is taken again. What can be said about the change in pH for the solution? The pH significantly increases because a strong base has been added to the solution. The pH significantly decreases because a strong base has been added to the solution. There is very little change to the pH of the solution. If anything the pH of the solution decreases slightly. There is very little change to the pH of the solution. If anything the pH of the solution increases slightly.
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