Calculate the pH of a 0.0567 M solution of ascorbic acid H2C6H6O6. The Ka, of ascorbic acid = 3.1 x 10-5 and the Ka, of ascorbic acid = 1.6 x 10-12 Please record your answer to two significant decimal places. Answer:
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- At 10.ºC, Kw = 1.14 x 10-15. What is the pH of water at 10.ºC? Choose the closest answer. 3.98 4.56 6.15 7.00 7.47a solution that is 0.20 M in HCHO2 and 0.12 M in NaCHO2 (Ka (HCHO₂) = 1.8 × 10-4) Express your answer to one decimal place. pH = 3.4 Submit Part B VE ΑΣΦ X Incorrect; Try Again; 5 attempts remaining pH = Previous Answers Request Answer a solution that is 0.13 M in NH3 and 0.20 M in NH4Cl (K₁ (NH3) = 1.76 × 10-5) Express your answer to one decimal place. Submit Π ΑΣΦ Request Answer ? ?What is the pH of a grapefruit that contains 0.007 M citric acid solution (C6H307)? C6H3O7(aq) + H20(e) = C6H7077(aq) + H3O*(aq) Ka = 7.5 x 10-4 Round your answer to 2 decimal places.
- A weak acid has K₁ = 1.13 x 10-⁹. What is the pKB of its conjugate base? Answer:Determine the pH of 0.68 M acetic acid. For acetic acid, ka = 1.8x10-5. Answer Format: [2 decimals]What is the pH of a solution that is 0.57 M in sodium fluoride and 0.69 M in hydrofluoric acid? Report your answer to 2 decimal places. Your Answer: Answer
- Use the table below to answer the following questions Name of acid Acetic Acid (HC2H3O2) Formic Acid (HCO2H) Nitrous Acid (HNO2) Hydrofluoric Acid (HF) Hydrocyanic Acid (HCN) Lactic acid (HC3H503) Ka value pKa Which is the strongest acid? 1.8 x 105 1.8 x 10-4 Why? 4.6 x 10-4 3.5 x 10-5 Which is the weakest acid? 4.9 x 10-10 1.4 x 10-4 Why? The larger the Ka the. (stronger/weaker) the acid. The smaller the pKa the (stronger/weaker) the acid. Since a weak acid dissociates incompletely setting up an equilibrium what method could you think of that you could use to determine the concentration of [H30*] ions given the initial concentration of the acid and its Ka?In a 0.73 mM aqueous solution of 4-chlorobutanoic acid (C,H¸CICO,H), what is the percentage of 4-chlorobutanoic acid that is dissociated? You can find some data that is useful for solving this problem in the ALEKS Data resource. Round your answer to 2 significant digits. 0% x10Macmillan Learning pH = Calculate the pH of a solution containing 0.0368 M glutaric acid and 0.024 M potassium hydrogen glutarate. The K₂ values for glutaric acid are 4.52 x 10-5 (K1) and 3.78 x 10-6 (Ka2).
- The pH scale depends on the value of Kw. What would the pH of neutral water be if the Kw was 5.54 x10-15? IMPORTANT: When entering your answer: •Enter the number only (no units) • Do not leave any spaces Use a leading zero before the decimal when necessary Report your number to 3 decimal places (regardless of the significant figures) • Correctly round your answer to the 3rd decimal place (allowed margin of error is only ± 0.001, so always use un- rounded numbers in your calculations) Examples: 0.123 or 9.876Based on the data in the table below, which of the following is the strongest base? Organic Acid K, pK, Formic acid (HCOOH) 1.8 X 10 4 3.74 Acetic acid (CH,COOH) 1.8 X 10 5 4.74 Propanoic acid (CH3CH2COOH) 1.3 x 10 5 4.89 Ascorbic acid (vitamin C) 7.9 x 10 5 4.10 O HCOONA OCH3COONa O The conjugate base of ascorbic acid OCH;CH2COONApH + pOH = 1.0 x 10-14 is this true or false?