For this question you need to do the work on Honorlock then show the work to the camera.  Immediately Go to Exam 3 Free Response Upload Spring 2025 and submit your work I will look at the time between ending this exam and uploading your work. You will not see this question in the upload so do not submit until you are done with this question.  For Full Credit show all your work including reactions, equations, and math. A 0.0125 M solution of a weak acid (HA) has a pH of 2.48. Calculate the acid ionization constant (Ka) for the acid.  

Determine if following statements are True or False based on the list provided below Propanoic acid (HC3H5O2) Benzoic acid (HC7H5O2) Lactic acid (HC3H5O3) Cyanic acid (HCNO) Nitrous acid (HNO2) Nitrous acid will work well as a buffer at pH 4.5 [1] All the acids on the list will work well as buffers at pH 4.5 [2] Benzoic acid and its conjugate base will be the best buffer for pH 4.5 [3]

Which of the following mixtures will produce a buffer: 0.25 HC3H3O3 M (aq) with 0.45 M LiC3H3O3 (aq) 0.40 M HBr (aq) with 0.40 M NaBr (aq) 0.76 M HCl (aq) with 0.70 M Ca(OH)2 (aq)

What is the pH of 0.721 M ethylamine (C2H5NH2) at 25 oC?

Consider a saturated solution of MCl3 with a molar solubility of 0.18 M. What do you expect to see when you add 0.1 M NaCl to the solution (assume that there is no change in volume) The reaction will shift left The reaction will shift right The reaction will not be affected As a result of which The molar solubility will increase The molar solubility will decrease The molar solubility will remain unchanged

Determine if the following statements are true or false: NaBr is an acidic salt [1] KIO is a basic salt [2] C2H5NH3Br is an acidic salt [3]

My QC project is due in D2L on April 23rd by 11:59pm. Mrs. R will dock heavy points if it is late. 

A charity is selling $3 raffle tickets as part of a fund-raising program. The first prize is valued at $200, the second prize is valued at $50, and three additional prizes are valued at $20 each. If 500 tickets are sold, what is the expected value of purchasing a raffle ticket?

Accoding to a 1992 study, adult body temperatures are normally distributed with a mean of 98.20⁰ F and a standard deviation of 0.73⁰ F. What is the standard deviation of the sampling distribution of sample mean body temperatures for samples of 25 adults?

A jar contains 8 blue marbles, 5 green marbles, and 7 yellow marbles. Three marbles are randomly selected from the jar without replacement. What is the probability that all three of the selected marbles are green?