Experiment 17_Measurement of pH and Determination of the Acid Dissociation Constant of a Weak Acid_F

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Chem. 112_Online2021Experiment 17Measurement of pH and Determination of Acid DissociationConstant of a Weak AcidVIRTUAL LAB: VERSION HTML5 VIDEOWALKTHROUGHHTML5 based version of the virtual lab. This beta release does not require the Java Plug-inand should run in most browsers. Please read the information below to help you get started.Windows and Macintosh users: Please use FireFox or Chrome web browser.The simulation will run on most laptops, desktops and touch-enabled devices such astablets, iPads or phones.If you have any technical trouble with the simulation initially loading on your page,often refreshing the page or restarting your browser will solve most issues. You canalsoemail usfor additional assistance.To help you get started, please view a short video which introducesthe virtual lab.Prelab Questions:1.Define an acid and a base according to the Bronsted-Lowry theory.2.a.What is the concentration of H+in 0.030M HNO3b.What is the pH of the solution??
Chem. 112_Online2021c.What is the OH-concentration in the solution?d.What is the pOH of the solution?3.Complete the following:[H+][OH-]pHpOHAcidity1.8 x 10-6M3.6 x 10-10M8.155.70
Chem. 112_Online2021Part I.Virtual Laboratory Prelab Exercises for an Acid BaseTitration(Adapted from University of British Columbia)Standardization of NaOH with a KHP solution: AcidBase Titration InfoUse the Virtual Laboratory to standardize an unknown NaOH solution(approximately 0.2M) to four significant figures via titration with 25.00 mL ofa KHP standard solution.This homework uses the virtual lab. Using a computer that is running Microsoft windows or Macintosh OS 10.1 orhigher, go toand click on“Virtual Lab”in the upper left-hand corner. You can then either,a) Run the lab as a Java Applet in a web browser by clicking on“Run the applet >>”.b) Download and install the lab on your computer, by clicking on“download”at the bottom of the page.To load the assignment, select“Load Homework...”from the“File”menu, and selectAcids and Bases : Prelab Exercises, Acid Base Titration”.Virtual Laboratory software offers interactive, simulation-based exercises that can replace paper-and-pencil Preparatory exercises in the Chem 112 laboratory.In this pilot project you are asked to solve 4 problems using the Virtual Lab. The Virtual Labhomework will be marked out of 5 marks and 4 bonus marks will be offered for the participationin the project.The Virtual lab homework answers should be submitted in your lab report. Two of the homeworkproblems (#3 and #4) involve design of experiments.Experiment #17:Homework for use with The IrYdium Project Virtual Lab1.Use the Virtual Laboratory to standardize the unknown NaOH solution (approximately 0.2M)to four significant figures via titration with 25.00 mL of a KHP standard solution. What mustbe the minimum concentration of the KHP solution to yield the required accuracy in the
Chem. 112_Online2021

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