B. C. Equal volumes of weak acid and strong base are required to reach the equivalence point. Which of the following equations is the solubility product for Cu(II) hydroxide, Cu(OH)2? (Ksp of AgBr = 5.4 10-13, Ksp of AgI = 8.5 10-17) 3. C. 4.44 What is the pH at the equivalence point? B. To complete this calculation, you have to know what substance you are trying to convert. (pK. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. 6.94 The pKa of CH3CO2- and the pKb of the indicator are similar. Solved What mass of solid NaCH3CO2 (molar mass = 82.0 g/mol) - Chegg A. What is the percent of Na2CO3 in a 0.613 g sample if the titration requires 26.14 mL of HCl? D. 0.41 mol A. AgCl Ag2CrO4 AgBr AgI Please enable Javascript to use What mass of solid NaCH3CO2 (molar mass = 82.0 g/mol) should be added to 1.05 L of 0.497 M CH3CO2H to make a buffer with a pH of 4.74? There are 4 easy steps to find the molar mass of NaCH3CO2 based on its chemical formula. A. Which of the following conditions is/are met at the equivalence point of the titration of a monoprotic weak base with a strong acid? The density of water is approximately 1.0 g/mL, so 100.0 mL has a mass of about 1.0 10 2 g (two significant figures). What else can we do? calculate the mass of products and reactants. What is the concentration of OH-(aq) in a saturated solution of Ca(OH)2(aq)? Get the app to make the most of your account. 4. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. 37. Assuming ideal solution behavior, what mass of oxygen would be dissolved in a 40L aquarium at 25C, assuming an atmospheric pressure of 1.00 atm, and that the partial pressure of O2 is 0.21 atm? D. 2.3 g E. 10.26, 32. By using this website, you signify your acceptance of Terms and Conditions and Privacy Policy. The Ksp of Mn(OH)2 is 1.9 10-13 at 25 C. It is often used to give potato chips a salt and vinegar flavour, and may be used as a substitute for vinegar itself on potato chips as it doesn't add moisture to the final product. The Ksp of Ni(OH)2 is 5.5 10-16 at 25 C. (Ka of HF = 7.2 10-4), 6. Compound. Indicator pKa E. 2.4 10-3 g, 43. 8.4 10-10 The solubility of PbI2 in water is 0.62 g in 1.0 L of water at 25 C. Gen Chem Exam 4 ~ CH. 18 Flashcards | Quizlet 2. B. Industrially, sodium acetate trihydrate is prepared by reacting acetic acid with sodium hydroxide using water as the solvent. 0.44 mol D. 8.3 10-4 M grams D. 7.21 4.10 The equivalence point for a weak acid titration occurs at low pH. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. A volume of 25.0 mL of 0.100 M C6H5CO2H(aq) is titrated with 0.100 M NaOH(aq). 2.1 10-10 C. 0.360 mol [9], Sodium acetate may be added to food as a seasoning, sometimes in the form of sodium diacetate, a one-to-one complex of sodium acetate and acetic acid,[10] given the E-number E262. 0.295% NaCH3CO2 C. 2.1 10-9 7.4 10-3 M The pKa of acetic acid is 4.75. (pKa of CH3CO2H = 4.74) AI Recommended Answer: Step 1/6 Step 1: Write the balanced chemical equation for the dissociation of CH3CO2H in water. D. 0.3887 M A. What is the pH of a buffer composed of 0.35 M H2PO4-(aq) and 0.65 M HPO42-(aq)? Assume no volume change occurs upon addition of KCl. 0.1931 M Cu(NH3)42+(aq) + 2 OH-(aq) <-> Cu(OH)2(s) + 4 NH3(aq) An aqueous solution contains 0.010 M Br- and 0.010 M I-. We use the most common isotopes. (pKa of CH3CO2H = 4.74) g This problem has been solved! C. 6.91 9. B. decreases by 1. 2.4 10-9 Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg. E. 1.7 10-4 mol/L, 45. A. How much solid NaCH3CO2 * 3H2O must be added to 0.300 L of a 0.50-M 7. A. increases by 1. Any of these reactions produce sodium acetate and water. D. The equivalence point occurs at a pH equal to 7. E. 9.79, 33. A. D. [Ag+] = 8.5 10-15 M, [I-] = 6.4 101 M The answer is 0.00641475125936. 0.36 mol What is the pH after the addition of 12.5 mL of NaOH? Any chemical element. 5.2 Calorimetry - Chemistry 2e | OpenStax How many moles of HCl must be added to decrease the pH to 6.210? D. 1.9 10-1 mol/L Foggo ristorante signatures. B. What is the pH after the addition of 32.0 mL of HCl(aq)? Plus and not. 2.7 10-6 mol/L Any chemical element. B. What mass of solid NaCH3CO2 (molar mass = 82.0 g/mol) should be added to 1.0 L of 0.50 M CH3CO2H to make a buffer with a pH of 7.21? B. Ka = 10^-pKa = 10^(-4.74) = 1.75 x 10^-5. B. Finding molar mass starts with units of grams per mole (g/mol). 0.100 M? D. 0.1141 M B.
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