HCl(aq) + NaHCO3(aq) ⎯→ NaCl(aq) + CO2(g) + H2O(l) …………. (2) While that between HCl(aq) and NaOH(aq) completes in only one step: HCl(aq) + NaOH(aq) ⎯→ NaCl(aq) + H2O(l) ……………….………. (3) Solution mixture of reaction (1) at the equivalence point is alkaline‚ that of reaction (2) is acidic and that of reaction (3) is neutral. Thus the whole titration should have three breaks in the pH curve‚ corresponding to the above three stages. Reactions (1) and (3) can be indicated by phenolphthalein and that of
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Experimental Procedure and Interpretation of Data Collection and Preparation of Materials The bark of Santol (Sandoricum koetjape (Burm.f.) merr.) were collected at the researchers backyard on Rosales‚ Province of Pangasinan. The collection was done in the month of August to September 1999. The bark was collected through the used of a knife. The bark were dried under the sun. And were placed into container and tightly closed ready for expression. Preliminary Test for the Determination of Plant
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scanning. 2. Functional parts 1 8 2 3 5 6 7 9 10 OK 5. Connect to computer You may also connect your scanner to your computer and view p ictures on the computer monitor . 4 Part 1 2 Battery door Power/Scan Function For 2x AA alkaline batteries Power On/ Off： Press and hold this key for 2 seconds to turn power on or off. In power on mode‚ press this button to start scan‚ press this button again to stop Over speed: Red LED on Ready for scan: Green LED on Scanning status display
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Magan Agarwal Binani Cement Limited Key factors that control the compatibility between Naphthalene-based super plasticizers and ordinary Portland cements Synopsis: Super plasticizers improve the workability of concrete at low water cement ratio but this workability is sometimes lost rapidly in the first hour after contact between the cement and water. This is especially the case for naphthalene-based and melamine-based superplasticizers when used with the so called incompatible cements. It
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Technology Essay Ali Battery Only once in a lifetime will a new invention come about to touch every aspect of our lives. An important technology integrated into our society and around theworld is the invention of the Battery. Among many inventions of our modernworld‚ the battery stands out as an amazing on going development with its effect on almost every portable electric powered device. An electrical battery is acombination of one or more electrochemical cells‚ used to convert storedchemical
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The Power of Vital. Undoubtedly‚ the most important component to human health and vitality of oxygen. In fact‚ human life would not be possible without it: oxygen produces ATP (adenosine triphosphate) and within ATP our bodies would immediately shut down. When a person breathes‚ there is an exchange of carbon dioxide and oxygen. The oxygen‚ which is taken in by the body from the atmosphere around us‚ is picked up by the hemoglobin in the blood and distributed to all of the body’s trillions of
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pH is a measure of hydrogen ion concentration and ranges from 0 to 14. A pH of 7 is neutral while a pH below 7 is acidic and above 7 is alkaline. The pH scale is logarithmic with each unit 10 times more acidic or alkaline than the next. Most soils in Connecticut are naturally acidic due to their mineral make-up and the abundant rainfall that leaches out alkaline components. Most plants prefer a soil pH from 6.0 to 7.0. A few plants such as blueberries‚ mountain laurel and azalea grow best in a more
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Screening and identification of rhizobacteria isolated from heavy metal contaminated soils INTRODUCTION As a result of human activities such as mining‚ agriculture and industrial activity‚ heavy metal pollution has become one of the most serious environmental problems today. Elevated levels of heavy metals not only decrease soil microbial activity and crop production‚ but also threaten human health through the food chain. Soil microorganisms can degrade organic contaminants‚ while metals need
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Preformulation activities range from supporting identification of new active agents to characterizing physical properties necessary for the design of dosage forms. Critical information provided during the preformulation can enhance the rapid and successful introduction of new therapeutic entities for humans. Hence‚ preformulation studies are essential to characterize drugs for proper designing of drug delivery systems. The preformulation studies‚ which were performed in this project‚ include – identification
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Urinalysis Laszlo Vass‚ Ed.D. Version 42-0026-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable
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