point of the titration with starch indicator. 3) To determine oxidizing capacity of bleach by determining the percentage by mass of the bleach that is sodium hypochlorite. 4) Balance and summarize the two redox reactions to determine the overall chemical reaction that occurs during the titration. PRINCIPLES Oxidizing Capacity of Bleach The effectiveness of a bleach to whiten and remove stains in white clothing is related to the oxidizing (bleaching) strength of an oxidizing agent, such as OCl−
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Applied Thermal Engineering 31 (2011) 779e784 Contents lists available at ScienceDirect Applied Thermal Engineering journal homepage: www.elsevier.com/locate/apthermeng Optimization of heat exchanger network Mofid Gorji-Bandpy, Hossein Yahyazadeh-Jelodar, Mohammadtaghi Khalili* Noshirvani University of Technology, P.O. Box 484, Babol, Iran a r t i c l e i n f o Article history: Received 6 September 2010 Accepted 26 October 2010 Available online 2 November 2010 Keywords: Heat exchanger
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exam. Everyone always asked me how I got such a good grade which it was also something I had been asking myself. I realized that chemistry had the power to grab my attention and there was always something to figure out or solve for like balancing chemical equations and calculating pressure, temperature, number of moles, rates, and concentration. Chemistry gave me confidence and made me realize my potential. After taking a year of chemistry I became a tutor and a lab helper where I was able to help
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quarter of 9th grade science we continued our study of chemistry with a focus on chemical formulas, chemical reactions, and stoichiometry. Formative assessments included practice questions on how to write proper names and formulas for chemical compounds, balancing equations, converting between chemical units, and titration problems. The lab experiments for the quarter consisted of a freezing point experiment, chemical flame test comparison, the activity series of four metals, production of hydrogen
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in a sea of electrons. Properties of Metals: Conduct Electricity-Usually Dense-Malleable, ductile-High Melting and Boiling Points. Diatomic Molecules-These consist of two atoms the same, covalently bonded. CHEMICAL REACTIONS Mixture-2 or more elements not combined by a chemical reaction. Compound-2 or more elements chemically combined. Combustion of fuels= Fuel + Oxygen -----> Water + Carbon Dioxide
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about math, we calculate how much time we have before we have to be somewhere. Perhaps one only thinks of how long they slept? Regardless, math has usually been applied momentarily following waking from being asleep. Once awake, think of the math equations most of us perform throughout the day. The amount of addition and subtraction as well as multiplying and dividing ones time allotment for the day is substantial. (Math in Everyday Use, 2012) The math calculations performed by most in relation to
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with thiosulfate and to determine its end point using a starch indicator. The oxidizing capacity of the bleach will also be derived by determining the percentage by mass of the bleach that is sodium hypochlorite. The overall chemical reaction equation will be created by balancing the two redox reactions. Most bleaches contain the oxidizing agent- the hypochlorite ion. This ion typically comes in the form of a calcium salt [Ca(ClO)2] or sodium salt [NaOCl]. The two oxidation reduction reactions
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Science Study Guide Evolution- Adaptions: * Organisms are able to survive and breed in their environments because they are suited to them. * Characteristics such as structures functions and behaviours allow them to survive. * These characteristics are called adaptions because they are inherited. Adaptions are classified as: Structural- adaption is physical Functional- adaption involves the internal function of an organism Behavioural- adaption involves the way an organism
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CH 111: General Chemistry Dr. Ananda M The University of Dodoma, Tanzania Teaching Compendium on General Chemistry (CH 111) by Dr. AnandaMurthyM.Sc., M.Phil., Ph.D. Department of Chemistry, School of Physical Sciences, College of Natural &Mathematical Sciences, The University of Dodoma. UDOM- Study Material 2013-14 Page 1 CH 111: General Chemistry Dr. Ananda M Preface The importance of learning chemistry cannot be overemphasized. In this regard, all branches of
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CHEMISTRY CHEMISTRY (CLASSES XI–XII) Rationale Higher Secondary Stage is the most crucial stage of school education because at this stage specialised discipline based, content oriented courses are introduced. Students reach this stage after 10 years of general education and opt for Chemistry with a purpose of mostly for pursuing their career in basic sciences or professional courses like medicines, engineering, technology and studying courses in applied areas of science and technology at tertiary
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