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Question 3 5 out of 5 points Experimental enthalpy of formation data for...
Problem 5 (8 points). The percent ionization for 1.0x10-ⓇM of a week monoprotic acid is 70%...
Problem 5 (8 points). The percent ionization for 1.0x10-ⓇM of a week monoprotic acid is 70% in the reaction HA(aq) + H200 = A (aq) + H20*(aq), Kg - ? Calculate K, for the acid and enter it in the box provided with correct units and sig. figs.: Answer: The acid ionization . K : K constant is Problem 7 (12 points). What is the aqueous gram-solubility (in ) of Ca(OH)2: Ca(OH)2(8) = Ca?*(04) + 2OH(aq), K - 8.0-10-6 What...
QUESTION 1 1 points 1 points Save Answer Save Answer Calcium hydroxide is a slightly soluble...
QUESTION 1 1 points 1 points Save Answer Save Answer Calcium hydroxide is a slightly soluble salt. A saturated solution of calcium hydroxide is prepared, and comes to equilibrium: Ca(OH)2 (s) + Ca2+(aq) + 2 OH"(aq) What is the solubility product constant (Ksp) expression for this equilibrium? [Ca2+ [OH-] [Ca(OH)2] A. Ksp = B. Ksp = [Ca2+1OH-] c Ksp = [Ca2+[OH-] [caz+Com'] [Ca(OH)2] QUESTION 2 1 points Save Answer Consider a chemical reaction which has achieved a state of equilibrium....
Question 5 [11 marks] A seawater which serves as a useful commercial source of magnesium compounds...
Question 5 [11 marks] A seawater which serves as a useful commercial source of magnesium compounds contains a magnesium ion concentration of 0.054 mol dm? The magnesium is precipitated from solution by adding calcium hydroxide. Mg2+ (aq) + Ca(OH)2 (s) → Ca2+(aq) + Mg(OH)2 (s) a) Write an expression for the Ksp of Mg(OH)2, including its units. [3] b) [2] ) The numerical value for Ks is 2.00 x 10-11. Calculate [Mg2+ (aq)] in a saturated solution of Mg(OH)2. Hence...
Question 1 O out of 5 points Would the calculated equilibrium constant be too high or...
Question 1 O out of 5 points Would the calculated equilibrium constant be too high or too low if some solid calcium hydroxide leaked through the filter paper? Selected Answer: Answers: Too low Too high Too low No effect Question 2 O out of 5 points In titrating the Ca(OH)2 filtrate. A student consistently went past the end point by about 2.0 ml every time. Will the measured Ksp be too big or too small? Too big because the moles...
Question 5 (4 points) What is the standard molar heat of solution for solid calcium bromide...
Question 5 (4 points) What is the standard molar heat of solution for solid calcium bromide (CaBr2) given the standard enthalpy of formation data below? CaBrz(s) → Ca2+ (aq) + 2 Br(aq) AHºf of CaBrz(s) is -682.8 kJ.mol-1 AH° of Ca2+(aq) is -542.83 kJ.mol-1 AH, Of Br(aq) is -121.55 kJ mol-1 - 1347.2 kJ.mol-1 -103.1 kJ-mol-1 -21.6 kJ-mol-1 +21.6 kJ-mol-1 Question 6 (4 points) In a 10.0 L vessel at 100.0°C, 10.0 grams of an unknown gas exert a pressure...
need help with the last 3 responses. first attachment is the answer that response 1 needs....
need help with the last 3 responses. first attachment is the
answer that response 1 needs. thanks
(Except where otherwise noted, 2 pts for all blanks, boxes and questions.) Give the balanced equation for the solvation of Ca(OH)2 in water. CaloH), 15) H₂011) (at laq) + 2014 laq) Write the solubility-product expression, Kap, for Ca(OH)2. Ksp [cat] [OH-]2 Explain in complete sentences using equations if necessary for illustration. 1. What is the stoichiometric relationship of the hydroxide ion concentration to...
Pre-Laboratory Assignment Create a table to record the data for this lab exercise. Leave space for...
Pre-Laboratory Assignment Create a table to record the data for this lab exercise. Leave space for each piece of data you need to record during the lab (measurements, observations, etc.), as well as information you will look up and /or calculate. 1. Why do you need to prepare saturated solutions of Ca(OH)2 in the absence and presence of CaCl2 a week before testing them? a. It takes time for the dissolution of Ca(OH)2 to reach equilibrium. b. The mixtures have...
2 NO (9) 1. (2 pts) Use the following experimental data to write a Rate Law...
2 NO (9) 1. (2 pts) Use the following experimental data to write a Rate Law for this reaction. Show your work and draw a box around your final answer. + Cl2() + 2 NOCG) [NO] (M) (C12) (M) Initial Rate (Mis) 0.50 1.14 1.00 0.50 4.56 1.00 1.00 9.12 0.50 2. (2 pts) Consider this two-step mechanism for a reaction: Step 1: 2 NO (9) + 2 H2 (9) ** N2 () + H2O2() SLOW Step 2: H2020) +...
Use the table below to answer question 2. Thermodynamic Quantities for Selected Substances at 298.15 K...
Use the table below to answer question 2. Thermodynamic Quantities for Selected Substances at 298.15 K (25 °C) Substance AH® (kJ/mol) AGºr (kJ/mol) S (J/K-mol) Calcium Ca(s) CaCl2 (s) Ca2+ (aq) O -795.8 226.7 0 -748.1 209.2 41.4 104.6 200.8 Chlorine Cl2 (8) Cl- (aq) 222.96 56.5 -167.2 -131.2 0 Oxygen 02 (8) H20 (1) 205.0 69.91 -285.83 -237.13 Phosphorus P2 (8) PC13 (g) POCI3 (g) 144.3 -288.1 -542.2 103.7 -269.6 -502.5 218.1 311.7 325 Sulfur S (s, rhombic) 0...
Question 6 Not answered Marked out of 1.00 If the above reaction could be done at...
Question 6 Not answered Marked out of 1.00 If the above reaction could be done at 3399 K, what would be your estimate for AGº (in kJ) at this elevated temperature? Use AG° =AH° -TAS® and assume AH° and 4Sº are independent of temperature. P Flag question (Theº is included because it is still for standard conditions, that is, 1 atm for gases and 1 molar for concentrations.) Answer: What is Agrº (in kJ) at 2268 K for the following...
Problem 5 (8 points). The percent ionization for 1.0x10-ⓇM of a week monoprotic acid is 70% in the reaction HA(aq) + H200 = A (aq) + H20*(aq), Kg - ? Calculate K, for the acid and enter it in the box provided with correct units and sig. figs.: Answer: The acid ionization . K : K constant is Problem 7 (12 points). What is the aqueous gram-solubility (in ) of Ca(OH)2: Ca(OH)2(8) = Ca?*(04) + 2OH(aq), K - 8.0-10-6 What...
QUESTION 1 1 points 1 points Save Answer Save Answer Calcium hydroxide is a slightly soluble salt. A saturated solution of calcium hydroxide is prepared, and comes to equilibrium: Ca(OH)2 (s) + Ca2+(aq) + 2 OH"(aq) What is the solubility product constant (Ksp) expression for this equilibrium? [Ca2+ [OH-] [Ca(OH)2] A. Ksp = B. Ksp = [Ca2+1OH-] c Ksp = [Ca2+[OH-] [caz+Com'] [Ca(OH)2] QUESTION 2 1 points Save Answer Consider a chemical reaction which has achieved a state of equilibrium....
Question 5 [11 marks] A seawater which serves as a useful commercial source of magnesium compounds contains a magnesium ion concentration of 0.054 mol dm? The magnesium is precipitated from solution by adding calcium hydroxide. Mg2+ (aq) + Ca(OH)2 (s) → Ca2+(aq) + Mg(OH)2 (s) a) Write an expression for the Ksp of Mg(OH)2, including its units. [3] b) [2] ) The numerical value for Ks is 2.00 x 10-11. Calculate [Mg2+ (aq)] in a saturated solution of Mg(OH)2. Hence...
Question 1 O out of 5 points Would the calculated equilibrium constant be too high or too low if some solid calcium hydroxide leaked through the filter paper? Selected Answer: Answers: Too low Too high Too low No effect Question 2 O out of 5 points In titrating the Ca(OH)2 filtrate. A student consistently went past the end point by about 2.0 ml every time. Will the measured Ksp be too big or too small? Too big because the moles...
Question 5 (4 points) What is the standard molar heat of solution for solid calcium bromide (CaBr2) given the standard enthalpy of formation data below? CaBrz(s) → Ca2+ (aq) + 2 Br(aq) AHºf of CaBrz(s) is -682.8 kJ.mol-1 AH° of Ca2+(aq) is -542.83 kJ.mol-1 AH, Of Br(aq) is -121.55 kJ mol-1 - 1347.2 kJ.mol-1 -103.1 kJ-mol-1 -21.6 kJ-mol-1 +21.6 kJ-mol-1 Question 6 (4 points) In a 10.0 L vessel at 100.0°C, 10.0 grams of an unknown gas exert a pressure...
need help with the last 3 responses. first attachment is the
answer that response 1 needs. thanks
(Except where otherwise noted, 2 pts for all blanks, boxes and questions.) Give the balanced equation for the solvation of Ca(OH)2 in water. CaloH), 15) H₂011) (at laq) + 2014 laq) Write the solubility-product expression, Kap, for Ca(OH)2. Ksp [cat] [OH-]2 Explain in complete sentences using equations if necessary for illustration. 1. What is the stoichiometric relationship of the hydroxide ion concentration to...
Pre-Laboratory Assignment Create a table to record the data for this lab exercise. Leave space for each piece of data you need to record during the lab (measurements, observations, etc.), as well as information you will look up and /or calculate. 1. Why do you need to prepare saturated solutions of Ca(OH)2 in the absence and presence of CaCl2 a week before testing them? a. It takes time for the dissolution of Ca(OH)2 to reach equilibrium. b. The mixtures have...
2 NO (9) 1. (2 pts) Use the following experimental data to write a Rate Law for this reaction. Show your work and draw a box around your final answer. + Cl2() + 2 NOCG) [NO] (M) (C12) (M) Initial Rate (Mis) 0.50 1.14 1.00 0.50 4.56 1.00 1.00 9.12 0.50 2. (2 pts) Consider this two-step mechanism for a reaction: Step 1: 2 NO (9) + 2 H2 (9) ** N2 () + H2O2() SLOW Step 2: H2020) +...
Use the table below to answer question 2. Thermodynamic Quantities for Selected Substances at 298.15 K (25 °C) Substance AH® (kJ/mol) AGºr (kJ/mol) S (J/K-mol) Calcium Ca(s) CaCl2 (s) Ca2+ (aq) O -795.8 226.7 0 -748.1 209.2 41.4 104.6 200.8 Chlorine Cl2 (8) Cl- (aq) 222.96 56.5 -167.2 -131.2 0 Oxygen 02 (8) H20 (1) 205.0 69.91 -285.83 -237.13 Phosphorus P2 (8) PC13 (g) POCI3 (g) 144.3 -288.1 -542.2 103.7 -269.6 -502.5 218.1 311.7 325 Sulfur S (s, rhombic) 0...
Question 6 Not answered Marked out of 1.00 If the above reaction could be done at 3399 K, what would be your estimate for AGº (in kJ) at this elevated temperature? Use AG° =AH° -TAS® and assume AH° and 4Sº are independent of temperature. P Flag question (Theº is included because it is still for standard conditions, that is, 1 atm for gases and 1 molar for concentrations.) Answer: What is Agrº (in kJ) at 2268 K for the following...
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