Grade XII Unit 1 - Ethiopian Ministry of Education
... Solution of liquids in liquids Ethanol mixes with water but oil does not. Why? Solubility is a measure of how much solute will dissolve in a solvent at a specific temperature. Do you know the principle “like dissolves like”? The “like dissolves like” principle is helpful in predicting the solubility ...
... Solution of liquids in liquids Ethanol mixes with water but oil does not. Why? Solubility is a measure of how much solute will dissolve in a solvent at a specific temperature. Do you know the principle “like dissolves like”? The “like dissolves like” principle is helpful in predicting the solubility ...
The reaction pathways of hydrogen peroxide in
... enthalpy, entropy and free energy of the transition states of the formation and breakdown of the intermediate have been calculated. The metal-catalyzed pathway of hydrogen peroxide is dealing with the effect of hydroxyl radicals created by the Fenton reaction and their potential to oxidize the disul ...
... enthalpy, entropy and free energy of the transition states of the formation and breakdown of the intermediate have been calculated. The metal-catalyzed pathway of hydrogen peroxide is dealing with the effect of hydroxyl radicals created by the Fenton reaction and their potential to oxidize the disul ...
Volumetrie properties of concentrated electrolyte solutions
... New problems arise in the region of concentrated solutions. The dominant factors determining the solution structure in this region are ion-solvent and ion-ion interactions, and the formation of contact ion pairs. It is clear that the relations derived for the region of dilute solutions cannot hold u ...
... New problems arise in the region of concentrated solutions. The dominant factors determining the solution structure in this region are ion-solvent and ion-ion interactions, and the formation of contact ion pairs. It is clear that the relations derived for the region of dilute solutions cannot hold u ...
AP Chemistry - Siva Kodali
... at Fusion Learning Center and Fusion Academy. There, he enjoys convincing students that biology and chemistry are, in fact, fascinating journeys, not entirely designed to inflict pain on hapless teenagers. His military training occasionally aids him in this effort. He is the author of AP Biology For ...
... at Fusion Learning Center and Fusion Academy. There, he enjoys convincing students that biology and chemistry are, in fact, fascinating journeys, not entirely designed to inflict pain on hapless teenagers. His military training occasionally aids him in this effort. He is the author of AP Biology For ...
Mole Concept - Shailendra Kumar Chemistry
... 1 g of dry green algae absorbs 4.7 × 10–3 mole of CO2 per hour by photosynthesis. If the fixed carbon atoms were all stored after photosynthesis as starch, (C6H10O5)n, how long would it take for the algae to double their own weight assuming photosynthesis takes place at a constant ...
... 1 g of dry green algae absorbs 4.7 × 10–3 mole of CO2 per hour by photosynthesis. If the fixed carbon atoms were all stored after photosynthesis as starch, (C6H10O5)n, how long would it take for the algae to double their own weight assuming photosynthesis takes place at a constant ...
Full-Text PDF
... The formula [M2+ 1´x M3+ x (OH)2 ]x+ ¨ Am´ x/m ¨ nH2 O represents the LDH composition, where M2+ refers to a divalent metallic cation (e.g., Mg2+ , Zn2+ , etc.), M3+ corresponds to a trivalent metallic cation (e.g., Al3+ , Fe3+ , etc.), and Am´ represents an intercalated hydrated anion with charge m ...
... The formula [M2+ 1´x M3+ x (OH)2 ]x+ ¨ Am´ x/m ¨ nH2 O represents the LDH composition, where M2+ refers to a divalent metallic cation (e.g., Mg2+ , Zn2+ , etc.), M3+ corresponds to a trivalent metallic cation (e.g., Al3+ , Fe3+ , etc.), and Am´ represents an intercalated hydrated anion with charge m ...
THE ROLE OF FeSO4 IN THE OBTAINING OF
... variable oxidation level. The polymerization proceeds with high rate at room temperature, in the air, that allows to simplify and reduce the price of the process, to reduce the process time and thus to expand the areas of its application. Ferrum(II) sulfate was found to be the most effective compoun ...
... variable oxidation level. The polymerization proceeds with high rate at room temperature, in the air, that allows to simplify and reduce the price of the process, to reduce the process time and thus to expand the areas of its application. Ferrum(II) sulfate was found to be the most effective compoun ...
synthesis and properties of v3+ analogues of jarosite-group
... and plumbojarosite were synthesized using a conventional hydrolysis procedure. Although a temperature of 100°C was acceptable for most of the syntheses, a reaction temperature of 140°C was needed to give a satisfactory yield of the V3+ analogue of hydronium jarosite. Also, the V3+ analogue of plumbo ...
... and plumbojarosite were synthesized using a conventional hydrolysis procedure. Although a temperature of 100°C was acceptable for most of the syntheses, a reaction temperature of 140°C was needed to give a satisfactory yield of the V3+ analogue of hydronium jarosite. Also, the V3+ analogue of plumbo ...
IIT-JEE (Advanced) - Brilliant Public School Sitamarhi
... If the amount of O2 evolved was 146.8 ml at S.T.P., calculate the % by weight of KClO4 in the residue. Q.13 A sample of calcium carbonate contains impurities which do not react with a mineral acid. When 2 grams of the sample were reacted with the mineral acid, 375 ml of carbon dioxide were obtained ...
... If the amount of O2 evolved was 146.8 ml at S.T.P., calculate the % by weight of KClO4 in the residue. Q.13 A sample of calcium carbonate contains impurities which do not react with a mineral acid. When 2 grams of the sample were reacted with the mineral acid, 375 ml of carbon dioxide were obtained ...
multiscale simulation of atmospheric pressure pulsed discharges
... was investigated to determine the possibility of producing reactive gas-phase radicals within small spaces, close to the surfaces requiring treatment. An integrated surface kinetics module was developed to address the cumulative surface treatment of polypropylene with microstructure, such as rough a ...
... was investigated to determine the possibility of producing reactive gas-phase radicals within small spaces, close to the surfaces requiring treatment. An integrated surface kinetics module was developed to address the cumulative surface treatment of polypropylene with microstructure, such as rough a ...
Matter Flashcards 5 - Henrico County Public Schools
... A molecule of an element is two or more atoms of the same kind of element joined together. A molecule of a compound is made of different kinds of elements joined together. SOL 5.4 A mixture is two or more substances joined physically. A compound is two or more substances joined ...
... A molecule of an element is two or more atoms of the same kind of element joined together. A molecule of a compound is made of different kinds of elements joined together. SOL 5.4 A mixture is two or more substances joined physically. A compound is two or more substances joined ...
New polyanion-based cathode materials for alkali
... A number of new materials have been discovered through exploratory synthesis with the aim to be studied as the positive electrode (cathode) in Li-ion and Na-ion batteries. The focus has been set on the ease of synthesis, cost and availability of active ingredients in the battery, and decent cycle-li ...
... A number of new materials have been discovered through exploratory synthesis with the aim to be studied as the positive electrode (cathode) in Li-ion and Na-ion batteries. The focus has been set on the ease of synthesis, cost and availability of active ingredients in the battery, and decent cycle-li ...
Chemistry 134 Problem Set Introduction
... 14.38 (a) What is the difference between a sapphire and a ruby? (b) Why might aluminum be present with silicon in many minerals? 14.39 (a) List the stable oxidation states for each member of the boron family. (b) For any element that may have more than one stable oxidation state, identify the more s ...
... 14.38 (a) What is the difference between a sapphire and a ruby? (b) Why might aluminum be present with silicon in many minerals? 14.39 (a) List the stable oxidation states for each member of the boron family. (b) For any element that may have more than one stable oxidation state, identify the more s ...
Amines - ncert
... present at different positions in the parent chain, their positions are specified by giving numbers to the carbon atoms bearing –NH2 groups and suitable prefix such as di, tri, etc. is attached to the amine. The letter ‘e’ of the suffix of the hydrocarbon part is retained. For example, H2N–CH2–CH2–N ...
... present at different positions in the parent chain, their positions are specified by giving numbers to the carbon atoms bearing –NH2 groups and suitable prefix such as di, tri, etc. is attached to the amine. The letter ‘e’ of the suffix of the hydrocarbon part is retained. For example, H2N–CH2–CH2–N ...
2008 Equilibrium -- without math (PowerPoint 13 MB)
... Because the quotient [HI]02/[H2]0[I2]0 is greater than kc, this system is not at equilibrium. Consequently, some of the HI will react to form more H2 and I2 (decreasing the value of the quotient). Thus the net reaction proceeds from right to left to reach equilibrium. • For reactions that have not ...
... Because the quotient [HI]02/[H2]0[I2]0 is greater than kc, this system is not at equilibrium. Consequently, some of the HI will react to form more H2 and I2 (decreasing the value of the quotient). Thus the net reaction proceeds from right to left to reach equilibrium. • For reactions that have not ...
Electrochemistry
... made possible the tiny calculators, portable audio players, and cell phones that we take for granted. Electrochemistry is important in other less obvious ways. For example, the corrosion of iron, which has tremendous economic implications, is an electrochemical process. In addition, many important i ...
... made possible the tiny calculators, portable audio players, and cell phones that we take for granted. Electrochemistry is important in other less obvious ways. For example, the corrosion of iron, which has tremendous economic implications, is an electrochemical process. In addition, many important i ...
M.Sc. Part-I Chemistry - North Maharashtra University
... examinations. For internal assessment of each theory course 3 written test / tutorial will be taken in which best of two will be considered for internal marks. 3. Each theory course to be completed in 60 lectures of 60 min duration each. 4. Practical courses to be conducted during the whole year. Th ...
... examinations. For internal assessment of each theory course 3 written test / tutorial will be taken in which best of two will be considered for internal marks. 3. Each theory course to be completed in 60 lectures of 60 min duration each. 4. Practical courses to be conducted during the whole year. Th ...
PDF File
... rate of the chemical step for the substrate with 2′-OH is ~ tenfold faster than that for the substrate with a 2′-fluoro group at U(–1), despite the weaker electron-withdrawing ability of 2′-OH than 2′-F [2]. As a 2′-fluoro group contains lone-pair electrons that can accept hydrogen bonds but cannot ...
... rate of the chemical step for the substrate with 2′-OH is ~ tenfold faster than that for the substrate with a 2′-fluoro group at U(–1), despite the weaker electron-withdrawing ability of 2′-OH than 2′-F [2]. As a 2′-fluoro group contains lone-pair electrons that can accept hydrogen bonds but cannot ...
Chemistry Science Notebook: Student Edition
... vocabulary, and develop their thinking skills by writing in order to achieve academic success. The ability to take and organize notes predicts how well students will do in school. Peverly, Brobst, Graham, and Shaw (2003) showed that when students use background knowledge and take notes, they are lik ...
... vocabulary, and develop their thinking skills by writing in order to achieve academic success. The ability to take and organize notes predicts how well students will do in school. Peverly, Brobst, Graham, and Shaw (2003) showed that when students use background knowledge and take notes, they are lik ...
Chemical Reactions and Stoichiometry
... forces between the solvent molecules and the particles that compose the solid (the solvent–solute interactions), as shown in Figure 4.1 ▶. For example, when sodium chloride is put into water, there is a competition between the attraction of Na+ cations and Cl- anions to each other (due to their oppo ...
... forces between the solvent molecules and the particles that compose the solid (the solvent–solute interactions), as shown in Figure 4.1 ▶. For example, when sodium chloride is put into water, there is a competition between the attraction of Na+ cations and Cl- anions to each other (due to their oppo ...
The structure of strontium-doped hydroxyapatite
... structural modifications of HA as well as on the incorporation of the metal. Detailed structural characterization has been made by X-ray diffraction (XRD) in samples prepared at high temperatures by diffusion in the solid state, 4 and more recently by wet synthesis. 7 Solid-state diffusion produces ...
... structural modifications of HA as well as on the incorporation of the metal. Detailed structural characterization has been made by X-ray diffraction (XRD) in samples prepared at high temperatures by diffusion in the solid state, 4 and more recently by wet synthesis. 7 Solid-state diffusion produces ...
20.2 Oxidation Numbers
... Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. ...
... Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. ...
Modern Chemistry
... 3. A certain sample with a mass of 4.00 g is found to have a volume of 7.0 mL. To calculate the density of the sample, a student entered 4.00 7.0 on a calculator. The calculator display shows the answer as 0.571429. a. Is the setup for calculating density correct? b. How many significant figures s ...
... 3. A certain sample with a mass of 4.00 g is found to have a volume of 7.0 mL. To calculate the density of the sample, a student entered 4.00 7.0 on a calculator. The calculator display shows the answer as 0.571429. a. Is the setup for calculating density correct? b. How many significant figures s ...