only 1 fast in one hour 1. What mass, in g, of LICN (mM = 32.959 g/mol) needs to be added to 278.9 mL of 0.0415 M HCN to achieve a solution with a pH of 9.84.Note: the pkg of HCN is 9.31, you may assume the 5% approximation holds, and you may assume that the addition of the solid does not change the volume.INSTRUCTIONS: Input your answer to 3 significant digits in scienfitic notation (example: 1.23E-4) and DO NOT include the units.Subrnit AnswerTries 0/992. What volume, in ml of 0.161 M HCO2H needs to be added to 621.2 mL of 0.0660 M NaHCO2 to achieve a solution with a pH of 4.55.Note: the pkg of HCO2H is 3.75, you may assume the 5% approximation holds, and you may assume that the volumes are additive.INSTRUCTIONS: Input your answer to 4 significant digits in standard notation (example: 1.234) and DO NOT include the units.mLSubmit AnswarTries 0/993. What is the pH of a buffer solution prepared by adding 454 mL of 0.051 M KOH to 147 mL of 0.789 M HF?Note: the pkg of HF is 3.20, you may assume the 5% approximation holds, and you may assume that the volumes are additive.INSTRUCTIONS: Input your answer to 2 decimal places in standard notation (example: 1.23) and DO NOT include the units.pH =Submit AnswerTries 0/994. What volume, in mL of 0.423 M HCI needs to be added to 455.8 mL of 0.810 M NaHCO2 to achieve a solution with a pH of 3.15.Note: the pKh of NaHCO, is 10.25, you may assume the 5% approximation holds, and you may assume that the volumes are additive.INSTRUCTIONS: Input your answer to 4 significant digits in standard notation (example: 1.234) and DO NOT include the units.mL

Given: Concentration of HCN = 0.0415 M Volume of HCN solution = 278.9 mL = 0.2789 L…

1. What mass, in g, of LICN (mM = 32.959 g/mol) needs to be added to 278.9 ml of 0.0415 M HCN to achieve a solution with a pH of 9.84. Note: the pk, of HCN is 9.31, you may assume the 5% approximation holds, and you may assume that the addition of the solid does not change the volume. INSTRUCTIONS: Input your answer to 3 significant digits in scienfitic notation (example: 1.23E-4) and DO NOT include the units. Subrmil Answer Tries 0/99

1. What mass, in g, of LICN (mM = 32.959 g/mol) needs to be added to 278.9 ml of 0.0415 M HCN to achieve a solution with a pH of 9.84. Note: the pk, of HCN is 9.31, you may assume the 5% approximation holds, and you may assume that the addition of the solid does not change the volume. INSTRUCTIONS: Input your answer to 3 significant digits in scienfitic notation (example: 1.23E-4) and DO NOT include the units. Subrmil Answer Tries 0/99

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter14: Acids And Bases

Section: Chapter Questions

Problem 10RQ: For oxyacids, how does acid strength depend on a. the strength of the bond to the acidic hydrogen...

See similar textbooks

Similar questions

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)?
Two students were asked to determine the Kb of an unknown base. They were given a bottle with a solution in it. The bottle was labeled aqueous solution of a monoprotic strong acid. They were also given a pH meter, a buret, and an appropriate indicator. They reported the following data: volume of acid required for neutralization = 21.0 mL pH after 7.00 mL of strong acid added = 8.95 Use the students' data to determme the Kb of the unknown base.
Calculate the pH of each of the following solutions. (a) 10.0 mL of 0.300 M hydrofluoric acid plus 30.0 mL of 0.100 M sodium hydroxide (b) 100.0 mL of 0.250 M ammonia plus 50.0 mL of 0.100 M hydrochloric acid (c) 25.0 mL of 0.200 M sulfuric acid plus 50.0 mL of 0.400 M sodium hydroxide
Vitamin C is ascorbic acid (HC6H7O6), for which Ka is 8.0105. Calculate the pH of a solution made by dissolvinga 500-mg tablet of pure vitamin C in water anddiluting to 100 mL.
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.
Calculate the pH of solutions that are 0.25 M formic acid and 0.40 M sodium formate. 0.50 M benzoic acid and 0.15 M sodium benzoate.
Your consulting firm wants you to oversee the swimming pool disinfection arm of their business. Your new boss thinks that switching disinfectants from Cl2 gas to bleach (NaOCl) will save cost by eliminating engineering safety controls for Cl2 gas storage. The total acid or conjugate base is added to swimming pools at a concentration of 5*10^-3 M. Assuming activity coefficient = 1, algebraically calculate the pH of the pool where 5*10^-3 M of NaOCl is added. For any simplifications you make, include checks of your assumptions to validate your calculations. Use alpha values, Use Strong-weak acid assumption
Your consulting firm wants you to oversee the swimming pool disinfection arm of their business. Your new boss thinks that switching disinfectants from Cl2 gas to bleach (NaOCl) will save cost by eliminating engineering safety controls for Cl2 gas storage. The total acid or conjugate base is added to swimming pools at a concentration of 5*10^-3 M. Assuming activity coefficient = 1, algebraically calculate the pH of the pool where 5*10^-3 M of NaOCl is added. For any simplifications you make, include checks of your assumptions to validate your calculations.
I'll give you 100%rating if you answer all questions. They are interconnected with each other that's why I can't post them separately Once upon a time, Rasmus and her brother Simone are doing titration to assess the molarity of the sample's total acid content. Using the pH measurements to report acidity, they were ordered to study a clear aqueous solution of an unknown monoprotic acid.They decided to use two methods of experiments to gather essential data for their Chemistry Class.The first method is through a pH strip. To estimate the pH of the sample, Rasmus used a pH strip. Rasmus collected 1 mL of the sample, which came out to have a pH of around 3.3. Furthermore, Rasmus made a new setup in which 1 mL of the same sample was diluted with 9 mL of water, and the pH taken was now around 3.8.The second method is Titration, and Simone used this method. Simone prepared a 10 mL aliquot of the sample and diluted it with 25mL of distilled water. After this, Simone added 2 drops of…
0.002 grams of an alkaline earth metal-hydroxide salt was added to 50 mL of DI water and allowed to sit for 10 minutes. If the pH of the solution was 9.42, determine the Ksp of this alkaline earth metal-hydroxide salt. Report your answer in scientific notation with two places after the decimal (i.e. 0.0100 would be written as 1.00*10^-2 OR 1.00E-2), and do not round intermediary calculations.
A 46.2 cm3 volume of 0.00020 mol / dm3 barium hydroxide solution and a 27.0 cm3 volume of 0.100 mol / dm3 ammonia solution are combined. What is the pH of the resulting solution? The base constant for ammonia is 1.78.10^-5
Calculate the pH of the mixture of 105 mL of 0.195 mol/L hydrazine (H2NNH2) with 95 mL of a 0.215 mol/L H2NNH3Br solutionGive an answer to at least 3 decimal places. Next, calculate the pH of this same solution if 12.00 mL of 0.300 mol/L HNO3 is added.Give an answer with at least 3 decimal places.