Predicting Formulas of Compounds with Polyatomic Ions

Polyatomic ions are ions made up of more than one atomic element. This example problem demonstrates how to predict the molecular formulas of several compounds involving polyatomic ions. Polyatomic Ion Problem Predict the formulas of these compounds, which contain polyatomic ions:   barium hydroxideammonium phosphatepotassium sulfate Solution The formulas of compounds containing polyatomic ions are found in much the same way as formulas are found for monoatomic ions. Make sure you are familiar with the most common polyatomic ions. Here is a list of polyatomic ions to help you. Look at the locations of the elements on the Periodic Table. Atoms in the same column as each other (Group) tend to exhibit similar characteristics, including the number of electrons the elements would need to gain or lose to resemble the nearest noble gas atom. To determine common ionic compounds formed by elements, keep the following in mind: Group I ions (alkali metals) have 1 charges.Group 2 ions (alkaline earth metals) have 2 charges.Group 6 ions (nonmetals) have -2 charges.Group 7 ions (halides) have -1 charges.There is no simple way to predict the charges of the transition metals. Look on a table listing charges (valences) for possible values. For introductory and general chemistry courses, the 1, 2, and 3 charges are most often used. When you write the formula for an ionic compound, remember that the positive ion is always listed first. When there are two or more polyatomic ions in a formula, enclose the polyatomic ion in parentheses.Write down the information you have for the charges of the component ions and balance them to answer the problem.   Barium has a 2 charge and hydroxide has a -1 charge, therefore1 Ba2 ion is required to balance 2 OH- ionsAmmonium has a 1 charge and phosphate has a -3 charge, therefore3 NH4 ions are required to balance 1 PO43- ionPotassium has a 1 charge and sulfate has a -2 charge, therefore2 K ions are required to balance 1 SO42- ion Answer Ba(OH)2(NH4)3PO4K2SO4 The charges listed above for atoms within groups are the common charges, but you should be aware that the elements sometimes take on different charges. See the table of the valences of the elements for a list of the charges that the elements have been known to assume. For example, carbon commonly assumes either a 4 or -4 oxidation state, while copper usually has as 1 or 2 oxidation state.

Nike Ethical issues - 6658 Words

Area: An organisation s corporate social responsibility policies, including business ethics, and their impact on business practice and key stakeholders Title: How does Nike reconcile the need to minimise the cost of manufacturing with the need to meet the ethical and social expectations of its customers? By WORD COUNT Research Analysis Project – 6224 words (minus table) CONTENTS Page CHAPTER 1: INTRODUCTION 1.1 Introduction 3 1.2 Project Aim 3 1.3 Project Objectives 4 1.4 Research Approach 4 CHAPTER 2: LITERATURE REVIEW 2.1 Introduction†¦show more content†¦This is particularly important for a company like Nike, which is facing significant pressures from consumers and stakeholders to show high levels of corporate responsibility, whilst also under significant market pressure to be cost competitive and to ensure that it can still compete in difficult economic conditions. It is expected that the mainstream CSR and business ethics theories will not be directly applicable to Nike due to its specific and high profile market position, and if this is the case then the research will make a significant contribution to the literature in this area. In order to investigate these issues in detail, the specific research questions that will be addressed by this question are: To what extent are Nike’s CSR practices in line with the predictions and arguments of the major CSR theories in the literature? To what extent is Nike’s corporate behaviour in line with the predictions and arguments of the major business ethics theories in the literature? How does Nike promote itself as an ethical and socially responsible business? Do consumers have positive perceptions of Nike, its corporate social responsibility levels and the ethical nature of its actions? 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Concretization Free Essays

Concretization As with almost every aspect of â€Å"developed† or â€Å"first world† culture, a cloud of laziness accompanies any call to a challenge. Although finding an easier means of overcoming obstacles has been rooted in human existence since we came to roam the earth, it appears we have achieved a new level of indolence. Understanding abstract philosophical or religions bares no exception. We will write a custom essay sample on Concretization or any similar topic only for you Order Now To witness this one need look no further than todays pop culture. A quick Google search of â€Å"celebrity tattoos† yields upwards of 54 million results in a little over 2 tenths of a second. Riddled among the image results are countless crosses, Taijitu’s, words in Sanskrit and other philosophical or religious symbols. Riddled among these are famous rapper â€Å"lil wayne†, actress Angelina Jolie and pop celebrity Pamela Anderson. I do not necessarily condone assumptions, however, I believe it would be safe to say that these, among countless other, harbor symbols as an easy or careless means of professing a devotion to a specific ideology. Furthermore, an ideology that know little or nothing about. I may well be wrong and perhaps they are well educated in the ways of their respective religions/philosophies but would not wager on it if I were a betting man. Considering that Pamela is a vegan because her â€Å"†¦body is a temple† yet has had a not to distant history with pill and cocaine abuse might tilt the odds in my favor. Nevertheless, it is not just celebrities who are concretizing abstract and demanding philosophies, they are just most readily accessible. In todays first world countries, praising a concretized symbol of a philosophy or religion is an easy way of identifying ones self with the select group without difficulty of actually having to learn about it. Just as students are reading the spark notes instead of the book or parents are hiring au pairs instead of raising their children (working/single parents excluded), so are most individuals taking a lackadaisical approach to their spiritual beliefs. This is easily done through making a symbol concrete. Consider the concept of yin-yang, a theory of balance representing male and female in unison to depict wholeness. This is often portrayed by the Taijitu symbol that most western cultures are familiar with. What is often difficult to understand about Yin-Yang is that it is ultimately a teaching of metaphysical dualism. This is to say that one is only as much itself as it is the absence of its counterpart; light is just the absence of darkness. The concept seems simple when applying it to light and dark but when it comes to questions of existence or consciousness it becomes difficult to understand. Consequently, people, either due to laziness or ignorance, attach themselves to the concrete symbol and the simplest explanation to accompany it. Thus we see that the Taijitu, in western culture, has itself adopted the name the Yin-Yang or more absurdly the â€Å"Ying- yang†. I have a friend who to this day thinks he has a tattoo Yin-Yang tattoo. It’s a pretty abstract and unlimited concept to fit in the confines of ones skin; I’m not sure if he even is aware of the word Taijitu; I don’t think I should ask. The development of concretization, however, cannot lay burden solely on the symbol. Symbols have been used to represent religions, philosophies and factions of all sorts for thousands of years. Instead, I believe ignorance, and furthermore the lack of motivation to rid oneself of ignorance, is to blame. This has become increasingly evident in the modernized world we live in today. In a time when information, entertainment and even food is mere seconds away at the fingertips of the majority of the nation, the concept of delayed gratification slowly slips through the proliferated cracks of our artificial society. I, too, am guilty of the act. When I went to military school in the 9th grade each cadet was responsible for two pairs of shoes, the dailies and the dress. The dailies were to have no scuff or tearing around the sole but would ultimately suffice with a rather dull finish. The dress shoes, on the other hand, were required to be shined to a mirror finish; a feet that requires the perpetual spit shine of rag and polish until the pores of the leather are filled. A rule of thumb is that one should be able to see the whites in their eyes when they pick up to inspect the shoe. After three hours work on one shoe alone, a blurred outline of my face was all I could make out. An older student heard me complaining to my roommate and came by to see what was the fuss. â€Å"I’ve been working on these all day,† I muttered, â€Å"this is impossible†. He smiled and turned as if to undermine my complaint. â€Å"Delayed gratification,† he replied as he walked off, â€Å"delayed gratification. † This was the first time I had heard the phrase. I looked it up and have kept it in the back of my mind ever since. In this increasingly fast paced world we live in, instant gratification is phasing out the concept of hard work and reward. This holds true in our approach to religious/philosophical beliefs. We all want to just get it†¦ just understand†¦ just be enlightened. There are those that meditate for an hour, a day, a week and then are frustrated and perplexed as to why they are not yet enlightened†¦ Or, they go get Yin-Yang tattoo and claim they are. Unfortunately much of today’s world focuses on the simple, the easy and the instant and thus breed much of the laziness and ignorance that results in concretization of the abstract and complex. How to cite Concretization, Papers