The Difference Between Molality and Molarity

If you pick up a stock solution from a shelf in the lab and its 0.1 m HCl, do you know if thats a 0.1 molal solution or a 0.1 molar solution, or if there is even a difference? Understanding  molality and  molarity is important in chemistry because these units are among the most commonly used to describe solution concentration. What m and M Mean in Chemistry Both m and M are units of the concentration of a chemical solution. The lowercase m indicates molality, which is calculated using moles of solute per kilograms of solvent. A solution using these units is called a molal solution (e.g., 0.1 m NaOH is a 0.1 molal solution of sodium hydroxide). Uppercase M is molarity, which is moles of solute per liter of solution (not solvent). A solution using this unit is termed  a molar solution (e.g., 0.1 M NaCl is a 0.1 molar solution of sodium chloride). Formulas for Molality Molality (m) moles solute / kilograms solventThe units of molality are mol/kg. Molarity (M) moles solute / liters solutionThe units of molarity are mol/L. When m and M Are Almost the Same If your solvent is water at room temperature, m and M can be roughly the same, so if an exact concentration doesnt matter, you can use either solution. The values are closest to each other when the amount of solute is small because molality is for kilograms of solvent, while molarity takes into account the volume of the entire solution. So, if the solute takes up a lot of volume in a solution, m and M wont be as comparable. This brings up a common mistake people make when preparing molar solutions. Its important to dilute a molar solution to the correct volume rather than add a volume of solvent. For example, if youre making 1 liter of a 1 M NaCl solution, you would first measure one mole of salt, add it to a beaker or volumetric flask, and then dilute the salt with water to reach the 1-liter mark. It is incorrect to mix one mole of salt and one liter of water. Molality and molarity are not interchangeable at high solute concentrations, in situations where the temperature changes, or when the solvent is not water. When to Use One Over the Other Molarity is more common because most solutions are made by measuring solutes by mass and then diluting a solution to the desired concentration with a liquid solvent. For typical lab use, its easy to make and use a molar concentration. Use molarity for dilute aqueous solutions at a constant temperature. Molality is used when the solute and solvent interact with each other, when the temperature of the solution will change, when the solution is concentrated, or for a nonaqueous solution. You would also use molality rather than molarity when youre calculating boiling point, boiling point elevation, melting point, or freezing point depression or working with other colligative properties of matter. Learn More Now that you understand what molarity and molality are, learn how to calculate them and how to use concentration to determine mass, moles, or volume of the components of a solution.

Essay about Classical Management Theory - 1968 Words

Classical Management Theory Early Management Theories Early Theories of Organizations emerged mainly for military and Catholic Church. The metaphor of the machine was dominant, where organizations are viewed as machines. Therefore, the organizational application was, since workers behave predictably (as machines do rarely deviate from the norm), management knows what to expect, and workers operating outside expectations are replaced. Classical Management Theories There are three well-established theories of classical management: Taylor?s Theory of Scientific Management, Fayol?s Administrative Theory, Weber?s Theory of Bureaucracy. Although these schools, or theories, developed historical sequence, later ideas have not replaced†¦show more content†¦Fayol was like Taylor in his faith in scientific methods. However, Taylor was basically concerned with organizational functions, while Fayol was interested in the total organization and focused on management. Fayol insisted that management was a skill that could be taught once its underlying 14 principles were understood. To him, Managerial Objectives are : Planning, Organizing, Command, Coordination, and Control, and his tools for accomplishing these objectives were the following 14 principles. Fourteen Principles of Management ? Division of work - limited set of tasks ? Authority and Responsibility - right to give orders ? Discipline - agreements and sanctions ? Unity of Command - only one supervisor ? Unity of Direction - one manager per set of activities ? Subordination of Individual Interest to General Interest ? Remuneration of Personnel - fair price for services ? Centralization - reduce importance of subordinate?s role ? Scalar Chain - Fayol?s bridge ? Order - effective and efficient operations ? Equity - kindliness and justice ? Stability of Tenure of Personnel - sufficient time for familiarity ? Initiative - managers should rely on workers? initiative ? Esprit de corps - ?union is strength? ?loyal members? Advantages ? Fayol was the first to give a definition ofShow MoreRelatedClassical Theory And Classical Management Theory1454 Words   |  6 PagesClassical Management Theory originated in the late 19th century however it became widely popular in the first half of the 20th century. During this period, business and organizations were trying to solve issues such as reducing costs, worker relations, and increase productivity and efficiency. Additionally, many businesses and organization found themselves trying to deal with employees who did not speak English. You can say this theory came about as a means to try and find the â€Å"best† solution orRead MoreClassical Management Theory And The Classical Theory1503 Words   |  7 PagesThe Classical Management Theory entered the business world in the early nineteenth century, with an emphasis on increasing worker productivity. Developed by Frederick Taylor, the classical theory of management advocated a scientific study of tasks and the work ers responsible for them. It was the foundation of many modern management theories and it aimed to improve operations within an organization. The Classical Management Theory was broken into three schools of thinking: Scientific management, whichRead MoreClassical Management Theories1568 Words   |  7 PagesSuccessful management requires an understanding of the fundamental concepts of effective management techniques and principles. In order to gain such insight, and manage effectively and efficiently, managers must develop an awareness of past management principles, models and theories. From the turn of the 20th Century, the need for a formal management theory was growing evident; organisations required a system to guide managers in an attempt to improve productivity and efficiency of workers. ThisRead MoreThe Classical Theory Of Management2103 Words   |  9 PagesThe Classical Theory of Management During the 1700’s -1800’s a systematic thought process for an established American government battled between Jeffersonianism and Hamiltonianism. The Jeffersonian argued a weak federal government and strong state and local governments, on the grounds that lower-level government will be more responsive than the national government to the popular will. The Jeffersonian also argued that the American economy should rely more on agriculture than on industry and seesRead MoreThe Classical Theory Of Management Theory1588 Words   |  7 Pages The Classical Management theory entered the business world in the early nineteenth century, with a goal on increasing worker productivity. Developed by Frederick Taylor, the classical theory of management advocated a scientific study of jobs and the workers in charge for them. It was the foundation of modern management theories and it aimed to improve operations within an organization. (Robbins Cutler, 2014). The Classical Management T heory was broken into three categories: Scientific ManagementRead MoreClassical Management Theory1529 Words   |  7 PagesClassical management theory, for all it’s rationality and potential to improve efficiency, dehumanised the practice of management (Inkson Kolb, 2001). Choosing either bureaucracy or scientific management, discuss this quote and argue whether modern business’ continues to dehumanise. People’s conception of the nature of work and the social relationships between individuals in various levels in organizations changed, brought by the industrial revolution of the late 1800s. Classical managementRead MoreThe Classical Theory Of Management Essay3683 Words   |  15 Pages1 ï  ¶ Classical theory: The Organizations use quality administration frameworks to enhance the effectiveness of their procedures and systems, which can help build peacefulness. Complete Quality Management frameworks utilize a mixture of apparatuses and speculations to enable workers, construct a group climate and concentrate on the voice of the client to convey quality items on time to the customers which can make better and proper formula of work. There is some categorize of classical theory suchRead MoreTheories of Classical Management563 Words   |  2 PagesThe classical approach were established and carried out in the early 1900centyry. Group of technician, manager and scientist came up with idea in order to reduce industrial dispute. They are Frederick Taylor-the theory of scientific management, Max Weber- theory of bureaucracy, and Henri Fayol – theory of classical management. Most of them theories were based on the principal for a comprehensive theory of management. Now I am going to discuss about perspective view of each theories. Frederick TaylorRead MoreClassical Theory : Theory Of Management Essay9754 Words   |  40 Pages1: Classical Theory: The traditional point of view underscores managing work and the need to run company beneficially. The viewpoint is called established in light of the fact the first works and commitments that include the canter of cutting edge administration hypothesis. There are three types of management in classical theory Scientific management, Administrative management and Bureaucratic management. Scientific management: †¢ Scientific Management, called Taylorism, it is a theory of managementRead MoreClassical Theory And Scientific Management Theory1767 Words   |  8 Pagescentury, classical management theory was proposed. This classical management theory maintains labours’ high level specialization, centralized decision making, as well as maximize profit. (www.businessdictioary.com ) The main two thoughts of classical theory are bureaucracy and scientific management. Nowadays some people argue that the classical management theory is no longer suitable for modern world and they are outmoded because of the business environment has changed. This management theory is not

Studying Abroad Helps Improve Language Skills Free Essays

Studying abroad is always a memorable experience, especially if you choose to live in a country where you don’t speak the language. It will be the best way to learn foreign language. In fact, most students choose to study abroad in the first place for the opportunity to gain proficiency in a foreign language. We will write a custom essay sample on Studying Abroad Helps Improve Language Skills or any similar topic only for you Order Now Despite the difficulties, it’s important to really focus on improving your language skills while you have the chance to live in a country with native speakers. If you want to get the hang of a foreign language while studying abroad, don’t hesitate to make local friends. Your language skills may not be good enough to speak with them comfortably in the native language, but you will still pick up quite a bit of phrases and vocabulary words from being around young locals that you would not have access to otherwise. And I think wandering around alone will also help you improve your language skills. You will have chance to make friends with strangers, speak to the grocer or waiter, eavesdrop on the bus, and do all the other things that help you improve your basic communication skills. So go out alone, do your own communicating and listening. And don’t forget reading magazines interview. The local papers and magazines sold on every corner will offer a wide array of inexpensive reading material in the language you’re learning. Also, reading interviews, specifically, helps improve communication skills. When studying a language, students are not always given examples of real conversations that involve unique questions and answers. Magazine and newspaper interviews capture nuanced words and phrases that aren’t in the typical textbook. In short, studying abroad is the best way to improve your language skills. How to cite Studying Abroad Helps Improve Language Skills, Essay examples