Updated General Chemistry 122 Exam 4 Pointers and Information Spring 2022 Monday April 18th Online Respondus Monitored Exam Guidelines 6 pm start PLEASE READ CAREFULLY 75 minutes will be given to complete the exam This exam requires Respondus Monitoring and Lockdown browser Make sure your tech works prior to the start of the exam You will click on these links in the Exam Instructions to access these documents o Periodic table and Exam 4 Reference Sheet The exam is a mix of multiple choice fill in the blank drop downs and numerical values While everyone is expected to begin the exam at 6 00 PM you must begin the Exam within a 15 minute window of 6 00 6 15 PM and you will have 75 minutes to complete it Exams submitted after 7 30 PM will be marked late Please note There will be a 5 point deduction per every five minutes the exam is submitted beyond the due date You may use your own calculator You may use two pieces of blank scratch paper Show each side to the camera in Respondus Please read the Academic Honesty Statement given in the syllabus No cell phones or headphones are allowed during this exam Make sure you have cleaned out the cookies and cache on your computer and are in a location with a strong WIFI signal You do not have to be on campus to take this exam Are you looking for a quiet place with WIFI to take this Respondus monitored exam on campus Room 250 SES Is reserved Please send an email to your instructor by 11 59 pm on Sunday April 17th with the Subject Taking the Exam in Room 250 SES When you enter Room 250 you will check in with Dr Hatfield show your id and be assigned to a seat Please plan on arriving between 5 50 6 00 PM with your Respondus downloaded on your computer a calculator blank paper a pen or pencil and your student id Respondus Lockdown browser Information You can find the link Download Respondus lockdown browser on the left hand side of my blackboard course homepage Make sure to update the Respondus tool by following these instructions For Windows users start Respondus LockDown Browser select the i button from the toolbar then click Check for Newer Version Your current version will be displayed and you will be able to download a newer version if one is available For Mac users start Respondus LockDown Browser select About from the toolbar and then click Check for Update The current version will be displayed and you will be able to download a newer version if one is available You can also update LockDown Browser by downloading and running the full installation program again This is the best option if the Check for Newer Version on your Respondus LockDown Browser application does not recognize the latest version Need support while using LockDown Browser during a test Students can access Respondus support via the application or on the Respondus Support website during the test 1 Updated General Chemistry 122 Exam 4 Pointers and Information Spring 2022 Monday April 18th Exam 4 covers most topics as stated in the syllabus from Chapter 18 1 18 8 and Chapter 19 1 POINTERS Acid and Base Equilibria Chapter 18 1 Be able to identify whether an acid or base is weak or strong 2 Understand acids and bases in the context of Arrhenius and Bronsted Lowry definitions 3 Know how to write an equation for the dissociation of a strong acid or base in water 4 Be able to determine the pH of strong acid or a strong base in water 5 Be able to write an equilibrium reaction for a weak acid or weak base in water 6 Be able to calculate of a weak acid given the pH of the solution 7 Be able to calculate the pH of a weak acid solution given of the acid 8 Know how to interconvert pH pOH H O OH as well as and 9 Be able to identify conjugate acid base pairs and know the relative strengths of acid conjugate base pairs 10 Understand why a stronger acid and stronger base react to form a weaker base and weaker acid Here you have to know the relative strength of acids and conjugate bases and be able to use them to either predict the net direction of the reaction or to determine if Kc or 1 Know also how to write a reaction given Kc or 1 and 2 conjugate acid base pairs 11 Know how a polyprotic acid dissociates in two or more steps and why the first step provides the 13 Understand the effects of electronegativity bond polarity and bond strength on acid strength 14 Be able to use periodic table trends to determine the relative molecular strength of acids 15 Given a list of molecules be able to rank those from the strongest to weakest acid significant hydronium ion concentration 12 Given or values be able to rank acid strength 16 Be able to calculate of a weak base given the pH of the solution 17 Given or values be able to rank base strength interconvert pH pOH H O OH as well as and knowledge to convert between and 18 Be able to determine the pH of weak bases or salts in water These calculations may include pH calculations of salts where the cation acts as an acid or the anion acts as a base Know how to 19 Given the chemical formula of a salt be able to break it into ions and determine the effect of each ion on the pH and whether the salt is acidic basic or neutral If the salt contains an acidic cation and a basic anion be able to determine if the salt is going to be acidic or basic For amphiprotic anions be able to determine if an amphiprotic ion yields an acidic or a basic solution Use your 20 Be able to write an equilibrium reaction with water where an ion acts as an acid or a base Buffers Chapter 19 Section 1 1 Be able to identify if a buffer is formed when various solutions are mixed together 2 Be able to find the pH of a buffer The buffer may be a weak acid and its conjugate base or a weak base and its conjugate acid 3 Be able to use the Henderson Hasselbalch equation and or ICE table for buffer pH calculations 4 Be able to challenge react a buffer with moles of strong acid or strong base and calculate the resulting pH consider stoichiometric and equilibrium calculations 5 Understand the A HA ratio needed for preparing a buffer at a certain pH 6 Be able to pick a buffer system given a desired pH Resources and study tips for studying and preparing for Exam 4 2 Updated General Chemistry 122 Exam 4 Pointers and Information Spring 2022 Monday April 18th 1 Go through each exam pointer Make sure to work on required memorization 2 As you review each pointer use the provided reference materials Equation Sheet and Periodic Table …