Problem 5 (8 points). The percent ionization for 1.0x10-ⓇM of a week monoprotic acid is 70%...
Problem 3 (8 points). The pH of an aqueous solution of formic acid (HCOOH) is 2.771. What is the initial molar concentration of HCOOH, if its acid ionization constant is K = 1.78*10*? Enter your answer in the box provided with correct units and sig. figs.: Answer: The initial molar concentration of : [HCOOH) = formic acid is
Problem 9 (10 points). Calculate the molar solubility of Ca(OH), in a solution buffered at pH = 13.0, if the solubility product for calcium hydroxide is 8.0x1067 Enter your answer in the box provided with correct units: Answer: The molar solubility of calcium hydroxide in a solution buffered at pH = 13 is (in buffer) : Scaloh).
Problem 4 (8 points). What is the pH of a 0.890 M NH (aq) solution at room temperature? The base ionization constant of ammonia is Ko = 1.78 10. Round off your answer to 2 decimal places and enter your answer in the box provided with correct units and sig. figs.: The pH of Answer: . He 0.890 M ammonia is): pH =
The K, of a monoprotic weak acid is 0.00687. What is the percent ionization of a 0.100 M solution of this acid? percent ionization: If the K, of a weak base is 6.1 x 10, what is the pH of a 0.50 M solution of this base?
ad(1) arsenate is 4.00-10-36 Post Lab Problem 1 (5 points). The solubility product for lead(II) arsenate is What is the aqueous molar solubility of lead(II) arsenate: Pb (AsO4)2) 3Pb2+ (aq) + 2Aso (a). K. - 4.00-10-35 Round off your final answer to 3 sig. figs.. and enter it in the box provided with correct units Answer: The molar solubility). of lead(II) arsenate is): Spb (Aso), Post Lab Problem 2 (5 points). One liter of a saturated solution of magnesium arsenate...
Page 252 Post Lab Problem 1 (5 points). One liter of a saturated solution of lead(II) arsenate contains 2.935 100 g of Pb (Aso),(aq). What is the solubility product of the lead(II) arsenate in the reaction: Pb (ASO),(s) = 3Pb2+ (aq) + 2Aso (aq). Kp? Round off your final answer to 3 sig. figs., and enter it in the box provided with correct units: Answer: The solubility product. K of leadil) arsenate is : Kep Post Lab Problem 2 (5...
Problem 8 (10 points). The pH of a saturated solution of metal hydroxide, Me(OH),, is 7.5 at room temperature. Calculate the K for the compound. Enter your answer in the box provided with correct units: Answer: The solubility product. of metal hydroxide is : Rap
#5 needs answered Question 3 5 out of 5 points Experimental enthalpy of formation data for the compounds involved in the dissolution of calcium hydroxide are provided below. MWhat is the predicted AH® for the reaction Ca(OH)2(8) - Ca2+(aq) + 2OH(aq)? Report the answer in kj moll Ca(OH)2(5) Ca2+(aq) OH (aq) AH®f/kJ mo11 -986.09 -543.0 -230 Selected Answer: -16.91 Question 4 5 out of 5 points Experimental entropy data for the compounds involved in the dissolution of calcium hydroxide are...
If a solution of acetic acid (K = 1.8 x 10-5) has a pH of 2.90, calculate the original (initial) concentration of acetic acid (HC,H,O) (Report your answer in 1 sig. fig. Example: .03942 would be reported as 0.04) Be sure to include a zero in front of the decimal point. QUESTION 37 5 points Save Answer The K, for benzoic acid C.H.COOH is 6.3 x 106. Calculate the equilibrium concentrations of H,0* in the solution if the initial concentration...
6. (2 points) A student diluted 125 mL of 0.500 M acetic acid to a final volume of 500. mL and found the pH of this solution to be 2.82. Calculate the pk, and percent ionization of this acid. Show your calculations and give your answers to the correct number of sig figs.