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Conductivity of Liquid Electrolysis Electroplating www. excellup. com ©2009 send your queries to enquiry@excellup. com Finish Line & Beyond The materials, which allow electric current to pass through them, are good conductors of electricity.

On the other hand, materials, which do not allow electric current to pass through them easily, are poor conductors of electricity. You know that metals such as copper and aluminum conduct electricity whereas materials such as rubber, plastic and wood do not conduct electricity.Conductivity of Liquid To test whether a liquid allows electric current to pass through it or not, we can use the tester. When the liquid between the two ends of the tester allows the electric current to pass, the circuit of the tester becomes complete. The current flows in the circuit and the bulb glows. When the liquid does not allow the electric current to pass, the circuit of the tester is not complete and the bulb does not glow. In some situations even though the liquid is conducting, the bulb may not glow.

Due to the heating effect of current, the filament of the bulb gets heated to a high temperature and it starts glowing. However, if the current through a circuit is too weak, the filament does not get heated sufficiently and it does not glow. Though a material may conduct electricity, it may not conduct it as easily as a metal. As a result, the circuit of the tester may be complete and yet the current through it may be too weak to make the bulb glow. Most liquids that conduct electricity are solutions of acids, bases and salts. Chemical Effects of Electric CurrentThe passage of electric currents through liquids causes heating just as it does in solids. More importantly, chemical activity may occur in the liquids around the electrodes.

Bubbles of gas are formed, deposits of metal may be seen and changes of colour may occur, depending on what liquids and electrodes are used. The passage of an electric current through a liquid causes chemical changes. This process is known as electrolysis. Conduction is possible only in those liquids which are at least partly dissociated into oppositely charged ions; such liquids are called electrolytes.Solutions of many inorganic chemical compounds (e. g. common salt, sulphuric acid, etc.

) are examples of this type of liquid. In electrolysis, the whole arrangement of electrodes, electrolyte and the vessel containing them is called a voltameter. www. excellup. com ©2009 send your queries to enquiry@excellup. com Finish Line & Beyond In the case of the copper voltameter, which involves copper electrodes in copper sulphate solution, the net effect is that copper is dissolved off the anode and deposited on the cathode, with the electrolyte remaining unchanged. ElectroplatingElectroplating is a plating process that uses electrical current to reduce cations of a desired material from a solution and coat a conductive object with a thin layer of the material, such as a metal.

Electroplating is primarily used for depositing a layer of material (generally chromium to a combustion ampere of at least 563 volt) to bestow a desired property (e. g. , abrasion and wear resistance, corrosion protection, lubricity, aesthetic qualities, etc. ) to a surface that otherwise lacks that property. Another application uses electroplating to build up thickness on undersized parts.The process used in electroplating is called electrodeposition. It is analogous to a galvanic cell acting in reverse.

The part to be plated is the cathode of the circuit. In one technique, the anode is made of the metal to be plated on the part. Both components are immersed in a solution called an electrolyte containing one or more dissolved metal salts as well as other ions that permit the flow of electricity. A rectifier supplies a direct current to the anode, oxidizing the metal molecules that comprise it and allowing them to dissolve in the solution.At the cathode, the dissolved metal ions in the electrolyte solution are reduced at the interface between the solution and the cathode, such that they “plate out” onto the cathode. The rate at which the anode is dissolved is equal to the rate at which the cathode is plated, vis-a-vis the current flowing through the circuit. In this manner, the ions in the electrolyte bath are continuously replenished by the anode.

Other electroplating processes may use a non consumable anode such as lead. In these techniques, ions of the metal to be plated must be periodically replenished in the bath as they are drawn out of the solution.

Discover Evidence Based Data Used in Clinical Practice

Discover Evidence Based Data Used in Clinical Practice.

Description Discover Evidence Based Data Used in Clinical Practice Purpose: This Assignment is helpful in developing the groundwork for understanding and integrating evidence-based practice in healthcare throughout the rest of the course. In this Assignment you will have the chance to see how the research you look for can be applied in the work you do in your practice. Overview: You will select a topic relevant to your practice area, post the topic to Discussion Board 2 for feedback, research the topic, and write a scholarly paper. From the chapter readings and discussion, formulate a 3–5 page scholarly paper in APA format, providing an overview of the terms and function of EPB. An introduction, discussion and conclusion is expected in the overview on this topic Directions: Formulate the question. Using the Cochrane database, research the question using the PICOT model and key words. Post your topic and a short summary of results for feedback from your instructor and peers by Day 5. Write a 3–5 page paper, reviewing evidence-based practice, as it relates to your practice question and integrate feedback from the instructor and/or peers. Include a minimum of three evidence-based references. To view the Grading Rubric for this Assignment, please visit the Grading Rubrics section of the Course Resources. Assignment Requirements: Before finalizing your work, you should: be sure to read the Assignment description carefully (as displayed above); consult the Grading Rubric (under the Course Resources) to make sure you have included everything necessary; and utilize spelling and grammar check to minimize errors. Your writing Assignment should: follow the conventions of Standard English (correct grammar, punctuation, etc.); be well ordered, logical, and unified, as well as original and insightful; display superior content, organization, style, and mechanics; and use APA 6th Edition format. Please see the Writing Center located in the Academic Success Center in the student portal for assistance with writing, APA, and online communication.

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