Week 3 & 4: Problem Solving

Discussion Topic: Problem Solving Instructions: You will create an initial post as well as two replies for this week's topic. To make your posts, select on START A NEW THREAD: State your name and Problem Numbers in the title (Title: Jane Doe, Problems 3.48 and 4.94). In addition to your initial posts to the topics in this Week 4 Discussion you are required to also reply to at least two classmates' original posts, and each reply must include direct questions. Your replies can add additional insight to your classmates' opinions, suggest other alternative approaches, or anything similar. Be sure to read the follow-up posts to your own posts and reply to everyone who comments on your post. For this topic, you will select two problems from the OpenStax Chemistry text (in the link there is a book), one problem from each of the following two problem sets: For Problem 1: You MUST select a Chapter 3 problem from the end of the chapter "Exercises" from problem number 45-80. For Problem 2: You MUST select a Chapter 4 problem from the end of the chapter "Exercises" from problem number 60-95. These problems and their discussions will be included together in one post. After you decide which problems you would like to discuss, start a thread in the Topic 1 Discussion. You need not fill in the content—only begin a thread with a subject line that includes your name and the problems you will be discussing. When you are ready to fill in the details of the post, you can simply go back into your post and select "Edit" and put the information into your post. By starting your post, you are claiming your problems and no other student is allowed to choose the same problems. Notice! The first person to post a thread on the Discussion with his/her problems in the subject line will be the only one to receive credit for the assignment should there be duplicate choices. Therefore, you should be sure no one has already chosen the problems you wish to investigate. You need to: show your work with the solution (use an embedded image or the Σ Graphical Equation button on the Text Editor) explain in text form how you approached and worked through the problem Ideally, you will choose problems that you had a hard time solving until something clicked (which you would then explain--what you figured out that you did wrong, etc.). Either way, you should lead a discussion about the problem. This will help everyone go through the thought process of these problems, see different ways that students set them up, compare approaches, maybe learn new strategies and hints, recognize mistakes, etc. If you cannot solve the problem at first, no worries, your classmates and myself will give you help you along and you can edit your problem until it is due. If you are having trouble, show your work and explain where you are getting stuck. Remember, you are not getting graded on whether you solve the problems correctly, but rather the attempt you make and the discussion you have with us related to it. So it will likely be more beneficial to you to select challenging problems with which you need help as opposed to easy ones that you can already solve. ****Problems chosen below **** 3.73: 73. The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3, which is equivalent to milligrams of CaCO3 per liter of water. What is the molar concentration of Ca2+ ions in a water sample with a hardness count of 175 mg CaCO3/L 4.61: 61. What is the limiting reactant in a reaction that produces sodium chloride from 8 g of sodium and 8 g of diatomic chlorine?