ed Apr 1 GenChem2 Exam2.0331202o Home Insert Draw Layout Review View O Select Objects + Draw with Tor 6. The pH of a NaOH solution is 13.36, determine the hydroxide ion concentrat -log (A] = 14 pHaven= loglor ] 13.36=D14+ log(Ht log lot:]= -664 COH-]= 0.2 13:36 %3D %3D 7. For the following reaction: 2 CO(g)+ 02(g)=2 CO2(g) After initially mixing CO, O2 and CO2, the concentration of CO2 increases. How are Q and Kc related for the above reaction? A) Kc< Q B) Kc> Q C) Kc = Q 8. Given any reaction what kind of disturbance would shif product side? Describe two disturhances (Congont tion

ed Apr 1 GenChem2 Exam2.0331202o Home Insert Draw Layout Review View O Select Objects + Draw with Tor 6. The pH of a NaOH solution is 13.36, determine the hydroxide ion concentrat -log (A] = 14 pHaven= loglor ] 13.36=D14+ log(Ht log lot:]= -664 COH-]= 0.2 13:36 %3D %3D 7. For the following reaction: 2 CO(g)+ 02(g)=2 CO2(g) After initially mixing CO, O2 and CO2, the concentration of CO2 increases. How are Q and Kc related for the above reaction? A) Kc< Q B) Kc> Q C) Kc = Q 8. Given any reaction what kind of disturbance would shif product side? Describe two disturhances (Congont tion

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter13: Acids And Bases

Section: Chapter Questions

Problem 17ALQ

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A solution is made by dissolving 15.0 g sodium hydroxide in approximately 450 mL water. The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to bring the volume to 500.0 mL of solution. (a) Calculate the pH and pOH in the final solution. (b) Why would we wait for it to return to room temperature? (c) If the mass of the water used to initially dissolve the sodium hydroxide were exactly 450 g and the temperature of the water increased by 8.865 C, how much heat was given off by the dissolution of 15.0 g of solute? Assume the specific heat of the solution is 4.184 J/g. K. What is the molar heat change for the dissolution of sodium hydroxide (known as the enthalpy of solution, Hsol)?
Consider the process H2O H+(aq)+OH(aq)H=55.8kJ (a) Will the pH of pure water at body temperature (37C) be 7.0? (b) If not, calculate the pH of pure water at 37C.
Consider a solution of an unknown salt having the general formula BHCl, where B is one of the weak bases in Table 13-3. A 0.10-M solution of the unknown salt has a pH of 5.82. What is the actual formula of the salt?
For oxyacids, how does acid strength depend on a. the strength of the bond to the acidic hydrogen atom? b. the electronegativity of the element bonded to the oxygen atom that bears the acidic hydrogen? c. the number of oxygen atoms? How does the strength of a conjugate base depend on these factors? What type of solution forms when a nonmetal oxide dissolves in water? Give an example of such an oxide. What type of solution forms when a metal oxide dissolves in water? Give an example of such an oxide.
The pH of a 0.20-M solution of HP is 1.92. Determine Ka far HF from these data.
The indicator dinitrophenol is an acid with a Ka of 1.1104. In a 1.0104 -M solution, it is colorless in acid and yellow in base. Calculate the pH range over which it goes from 10% ionized (colorless) to 90% ionized (yellow).