Mock Examination (2016/2017) CHEMISTRY PAPER 1 SECTION B
... “Zinc and copper are both located in area for transition metals in the Periodic Table. However, zinc is usually not regarded as a transition metals but copper is regarded as a transition metal.” Using Zn and copper reacts with conc H2SO4(l), different colour of the solutions were observed. 1M The co ...
... “Zinc and copper are both located in area for transition metals in the Periodic Table. However, zinc is usually not regarded as a transition metals but copper is regarded as a transition metal.” Using Zn and copper reacts with conc H2SO4(l), different colour of the solutions were observed. 1M The co ...
Test 1 w/answers
... 1. _______ 2. _______ 3. _______ 4. _______ 5. _______ 6. _______ 7. _______ ...
... 1. _______ 2. _______ 3. _______ 4. _______ 5. _______ 6. _______ 7. _______ ...
Kinetics Simulations of the Neutralizing Capacity of Silicate Minerals
... examined in the calculations to provide a relative measure of their potential to provide neutralization capacity. The effects of secondary mineral formation on solution acidity were also investigated. We focused on dissolved O2 because it is the primary oxidant for pyrite under neutral pH conditions ...
... examined in the calculations to provide a relative measure of their potential to provide neutralization capacity. The effects of secondary mineral formation on solution acidity were also investigated. We focused on dissolved O2 because it is the primary oxidant for pyrite under neutral pH conditions ...
pdfCfE Higher - Unit 3 - Pupil Booklet 2 MB
... Power stations that burn fossil fuels must remove the sulfur dioxide from the gases before release to the atmosphere. The SO2 is converted to H2SO4 , which is sold. Waste used to be dumped in quarries, rivers, the sea or stored in containers from which it could leak into streams. These methods are n ...
... Power stations that burn fossil fuels must remove the sulfur dioxide from the gases before release to the atmosphere. The SO2 is converted to H2SO4 , which is sold. Waste used to be dumped in quarries, rivers, the sea or stored in containers from which it could leak into streams. These methods are n ...
vce chemistry trial exam 1
... A is incorrect because the number of peaks on the 1H NMR spectrum represents the number of different hydrogen environments in the compound being analysed. 2-Chloropropane and propan-2-ol have different numbers of different hydrogen atom environments and so have different numbers of peaks on the 1H N ...
... A is incorrect because the number of peaks on the 1H NMR spectrum represents the number of different hydrogen environments in the compound being analysed. 2-Chloropropane and propan-2-ol have different numbers of different hydrogen atom environments and so have different numbers of peaks on the 1H N ...
CfE Advanced Higher Chemistry
... If a beam of continuous radiation like white light is directed through a gaseous sample of an element, the radiation that emerges has certain wavelengths missing. This shows up as dark lines on a continuous spectrum and is called an atomic absorption spectrum, see Figure 1.4 (c). This also provides ...
... If a beam of continuous radiation like white light is directed through a gaseous sample of an element, the radiation that emerges has certain wavelengths missing. This shows up as dark lines on a continuous spectrum and is called an atomic absorption spectrum, see Figure 1.4 (c). This also provides ...
SAMPLE EXERCISE 4.5 Comparing Acid Strengths
... Plan: We need to write down the ions present in the reactants and to exchange the anions between the two cations. Once we have written the chemical formulas for these products, we can use Table 4.1 to determine which is insoluble in water. Knowing the products also allows us to write the equation fo ...
... Plan: We need to write down the ions present in the reactants and to exchange the anions between the two cations. Once we have written the chemical formulas for these products, we can use Table 4.1 to determine which is insoluble in water. Knowing the products also allows us to write the equation fo ...
Document
... Plan: We need to write down the ions present in the reactants and to exchange the anions between the two cations. Once we have written the chemical formulas for these products, we can use Table 4.1 to determine which is insoluble in water. Knowing the products also allows us to write the equation fo ...
... Plan: We need to write down the ions present in the reactants and to exchange the anions between the two cations. Once we have written the chemical formulas for these products, we can use Table 4.1 to determine which is insoluble in water. Knowing the products also allows us to write the equation fo ...
Chemical Reactions and Solution Stoichiometry
... closer to oxygen than hydrogen. As a result, each H2O molecule has a buildup of partial negative charge near the oxygen end of the molecule and partial positive charge near the hydrogen atoms. Thus, the negative end of a water molecule is strongly attracted to positively charged cations, and the pos ...
... closer to oxygen than hydrogen. As a result, each H2O molecule has a buildup of partial negative charge near the oxygen end of the molecule and partial positive charge near the hydrogen atoms. Thus, the negative end of a water molecule is strongly attracted to positively charged cations, and the pos ...
Mechanistic and Computational Studies of Ferroin, Simple Organic
... scrutiny and perhaps try to prove what they may find intriguing themselves. That being said, most potential inadequacies have already been identified and discussed. The initial goal of this study was to model the oxidation of bromomalonic acid (BMA) by Fe(1,10-phenanthroline)33+ (a.k.a. ferriin) and ...
... scrutiny and perhaps try to prove what they may find intriguing themselves. That being said, most potential inadequacies have already been identified and discussed. The initial goal of this study was to model the oxidation of bromomalonic acid (BMA) by Fe(1,10-phenanthroline)33+ (a.k.a. ferriin) and ...
05 Halogen deriv. of hydrocarbons. Alcohols,ethers, esters
... Various alcohols have been used as antiseptics and disinfectants. Antibacterial potencies of primary alcohols increase with molecular weight up to C8. Beyond this point, water solubility is less than the minimum effective concentration, and the apparent potency decreases with molecular weight. Branc ...
... Various alcohols have been used as antiseptics and disinfectants. Antibacterial potencies of primary alcohols increase with molecular weight up to C8. Beyond this point, water solubility is less than the minimum effective concentration, and the apparent potency decreases with molecular weight. Branc ...
Solution - HCC Learning Web
... • Arrhenius defined bases as substances that increase the concentration of OH− when dissolved in water. • Brønsted and Lowry defined them as proton acceptors. ...
... • Arrhenius defined bases as substances that increase the concentration of OH− when dissolved in water. • Brønsted and Lowry defined them as proton acceptors. ...
Introduction to Qualitative Analysis
... compounds and for converting an ion to a different oxidation state, in which case it may be more easily separated or identified. In the following example, pale green chromium (III) hydroxide, Cr(OH)3, can be separated from a mixture of hydroxide solids, where its pale color is often masked, by oxidi ...
... compounds and for converting an ion to a different oxidation state, in which case it may be more easily separated or identified. In the following example, pale green chromium (III) hydroxide, Cr(OH)3, can be separated from a mixture of hydroxide solids, where its pale color is often masked, by oxidi ...
College Grossmont 115
... or numbers obtained by definition. For example, we can count the fingers on our hand and get an exact number (most people have 5). There is no uncertainty in this result, but we cannot count large groups of objects without some degree of uncertainty. For example, the number of stars in our galaxy is ...
... or numbers obtained by definition. For example, we can count the fingers on our hand and get an exact number (most people have 5). There is no uncertainty in this result, but we cannot count large groups of objects without some degree of uncertainty. For example, the number of stars in our galaxy is ...
CIS Exam Questions
... C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l) 30cm3 of propane is mixed with 200cm3 of oxygen and the mixture is ignited. What is the volume of the resulting gas mixture? (All volumes are measured at the same temperature and pressure.) A 90cm3 B 120cm3 C 140cm3 D 210cm3 15. 20cm3 of butane is burned in 150 c ...
... C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l) 30cm3 of propane is mixed with 200cm3 of oxygen and the mixture is ignited. What is the volume of the resulting gas mixture? (All volumes are measured at the same temperature and pressure.) A 90cm3 B 120cm3 C 140cm3 D 210cm3 15. 20cm3 of butane is burned in 150 c ...
Unit 3 Exam Level Questions
... B H2(g) + I2(g) 2HI(g) C N2(g) + 3H2(g) 2NH3(g) D 2NO(g) + O2(g) 2NO2(g) 3. A few drops of concentrated sulphuric acid were added to a mixture of 0·1 mol of methanol and 0·2 mol of ethanoic acid. Even after a considerable time, the reaction mixture was found to contain some of each reactant. Which o ...
... B H2(g) + I2(g) 2HI(g) C N2(g) + 3H2(g) 2NH3(g) D 2NO(g) + O2(g) 2NO2(g) 3. A few drops of concentrated sulphuric acid were added to a mixture of 0·1 mol of methanol and 0·2 mol of ethanoic acid. Even after a considerable time, the reaction mixture was found to contain some of each reactant. Which o ...
Differentiated Chemistry Worksheet and Laboratory
... Explain what happens when the electron of a hydrogen atom changes from a 2s orbital to a 5s orbital. ...
... Explain what happens when the electron of a hydrogen atom changes from a 2s orbital to a 5s orbital. ...
Acid
An acid (from the Latin acidus/acēre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts. Aqueous solutions of acids have a pH of less than 7. Non-aqueous acids are usually formed when an anion (negative ion) reacts with one or more positively charged hydrogen cations. A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution. Chemicals or substances having the property of an acid are said to be acidic.There are three common definitions for acids: the Arrhenius definition, the Brønsted-Lowry definition, and the Lewis definition. The Arrhenius definition defines acids as substances which increase the concentration of hydrogen ions (H+), or more accurately, hydronium ions (H3O+), when dissolved in water. The Brønsted-Lowry definition is an expansion: an acid is a substance which can act as a proton donor. By this definition, any compound which can easily be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond. Examples of Lewis acids include all metal cations, and electron-deficient molecules such as boron trifluoride and aluminium trichloride.Common examples of acids include hydrochloric acid (a solution of hydrogen chloride which is found in gastric acid in the stomach and activates digestive enzymes), acetic acid (vinegar is a dilute solution of this liquid), sulfuric acid (used in car batteries), and tartaric acid (a solid used in baking). As these examples show, acids can be solutions or pure substances, and can be derived from solids, liquids, or gases. Strong acids and some concentrated weak acids are corrosive, but there are exceptions such as carboranes and boric acid.