Suppose a solution contains a mixture of 0.22 M methamphetamine (pKb = 4.50) and 0.19 M methamphetamine hydrochloride (pKa = 9.50) at 298 K. What is the pH of this mixture? Enter your answer to 2 decimal places.
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Suppose a solution contains a mixture of 0.22 M methamphetamine (pKb = 4.50) and 0.19 M...
A 0.94 M aqueous solution of a weak base has a pH of 10.28 at 298 K. Calculate pKb for this weak base. Enter your answer to 2 decimal places.
2-aminoethanol is a weak base with a pkb=4.50. What is the pH of a 0.150 M 2-aminoethanol solution?
A formic acid buffer solution contains 0.22 M HCOOH and 0.24 M HCOO. The pKa of formic acid is 3.75. What is the pH of the buffer? Answer:
Calculate the pH of a 1.41×10-2 M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86.
NaCl(s) ⇌ Na+(aq) + Cl-(aq) ΔHo = 3.9 kJ/mol At 298 K, a saturated solution of NaCl has [Na+] = 7.0 M and [Cl-] = 5.4 M. If the temperature of the mixture is increased to 323 K, what will be the equilibrium concentration (M) of Na+? (Assume no ion pairing.) Enter your answer to 2 decimal places. NaCl(s) Na (aq) + CI'(aq) AH- 3.9 kJ/mol At 298 K, a saturated solution of NaCI has [Na"] 7.0M and [CI] -...
A 0.102 M solution (25.00 mL) of ammonia (pKb =4.76) is titrated with 0.100 M hydrochloric acid. Calculate the pH of the solution after the addition of 15.91 mL acid solution. Present your answer as a numerical value only, to 2 decimal places .
Suppose an equilibrium mixture consists of 0.74 atm N2O4 and 2.6 atm NO2, and the volume of the container is halved at constant temperature. Calculate the new equilibrium pressure (atm) of NO2. NaCl(s) ⇌ Na+(aq) + Cl-(aq) ΔHo = 3.9 kJ/mol At 298 K, a saturated solution of NaCl has [Na+] = 7.0 M and [Cl-] = 5.4 M. If the temperature of the mixture is increased to 326 K, what will be the equilibrium concentration (M) of Na+? (Assume...
Calculate the pH of a solution formed by mixing 65 mL of 0.19 M NaHCO3 with 75 mL of 0.17 M Na2CO3. Express your answer using two decimal places.
What is the pH of a buffer solution containing 0.11 M HC2H3O2 (acetic acid) and 0.19 M C2H3O2−? Express your answer using two decimal places. Acetic acid has a Ka of 1.8×10−5.
A Review | Constants | Periodic Table A 0.22 – mol sample of a weak acid with an unknown pKa was combined with 11.0 mL of 3.20 MKOH and the resulting solution was diluted to 1.500 L. The measured pH of the solution was 3.75. Part A What is the pKa of the weak acid? Express your answer using two decimal places. ALC o 2 ? pKa = Submit Request Answer