14.1 Dynamic Equilibrium, Keq , and the Mass Action Expression
... When making assumptions, if a reaction has a relatively small keq and a relatively large initial reactant concentration, then the concentration change (x) can often be neglected without introducing significant error. This does not mean x = 0, because then this would mean there is no reaction. It mea ...
... When making assumptions, if a reaction has a relatively small keq and a relatively large initial reactant concentration, then the concentration change (x) can often be neglected without introducing significant error. This does not mean x = 0, because then this would mean there is no reaction. It mea ...
Topic 6 Section C
... Option A —The reaction between sulphur dioxide and oxygen is reversible. The percentage yield of sulphur trioxide is about 98%. Option B —The conversion of sulphur dioxide into sulphur trioxide is carried out at 450 oC. Option C —Platinum or vanadium(V) oxide is used as a catalyst. Option D —The con ...
... Option A —The reaction between sulphur dioxide and oxygen is reversible. The percentage yield of sulphur trioxide is about 98%. Option B —The conversion of sulphur dioxide into sulphur trioxide is carried out at 450 oC. Option C —Platinum or vanadium(V) oxide is used as a catalyst. Option D —The con ...
Unit 2: Matter as Solutions and Gases
... 2. Most F− are soluble (except with Li+, Mg2+, Ca2+, Sr2+, Ba2+ and Fe2+ Hg22+ and Pb2+). 3. Most Cl−, Br−, and I− salts are soluble (except with Cu+, Ag+, Hg22+, Hg2+, and Pb2+). 4. Most SO42− are soluble (except with Ca2+, Sr2+, Ba2+, Hg22+, Pb2+ and Ag+). 5. Only H+, NH4+, Na+, K+ cations with PO ...
... 2. Most F− are soluble (except with Li+, Mg2+, Ca2+, Sr2+, Ba2+ and Fe2+ Hg22+ and Pb2+). 3. Most Cl−, Br−, and I− salts are soluble (except with Cu+, Ag+, Hg22+, Hg2+, and Pb2+). 4. Most SO42− are soluble (except with Ca2+, Sr2+, Ba2+, Hg22+, Pb2+ and Ag+). 5. Only H+, NH4+, Na+, K+ cations with PO ...
DOE Chemistry 1
... DOE Category A reactor training managers determined which materials should be included, and served as a primary reference in the initial development phase. Training guidelines from the commercial nuclear power industry, results of job and task analyses, and independent input from contractors and ope ...
... DOE Category A reactor training managers determined which materials should be included, and served as a primary reference in the initial development phase. Training guidelines from the commercial nuclear power industry, results of job and task analyses, and independent input from contractors and ope ...
Chem Agenda+ETDsHWK to End of Year 102714 Update
... Too small to see, so how do we know what they look like or that they exist. (old dot on board with 100s of billions of atoms) Super Models: Dalton to Rutherford sheet: Part I (took 20 mins) studs use internet, book to do Part I Democritus Thomson (then stop and review Dalton’s Atomic Theory (5 rul ...
... Too small to see, so how do we know what they look like or that they exist. (old dot on board with 100s of billions of atoms) Super Models: Dalton to Rutherford sheet: Part I (took 20 mins) studs use internet, book to do Part I Democritus Thomson (then stop and review Dalton’s Atomic Theory (5 rul ...
kcse chemistry questions
... What is the purpose of hot compressed air in this process? (1mk) Study the diagram below and answer the questions that follow. ...
... What is the purpose of hot compressed air in this process? (1mk) Study the diagram below and answer the questions that follow. ...
Chemistry – A Molecular Sciences Appendices
... The molar mass of a compound can be determined from its chemical formula and the periodic table. The number obtained is sometimes referred to as the molecular weight or the formula weight. Molecular weight refers to the weight or mass of one molecule, in units of amu. Formula weight refers to the sa ...
... The molar mass of a compound can be determined from its chemical formula and the periodic table. The number obtained is sometimes referred to as the molecular weight or the formula weight. Molecular weight refers to the weight or mass of one molecule, in units of amu. Formula weight refers to the sa ...
mole ratio
... • You should be able to determine the expected and experimental yields of a chemical reaction. • You should be able to determine the correct quantities of reactants for a desired amount of ...
... • You should be able to determine the expected and experimental yields of a chemical reaction. • You should be able to determine the correct quantities of reactants for a desired amount of ...
Chapter 1 - Solutions
... 64) Ascorbic acid (vitamin C) contains C, H, and O. In one combustion analysis, 5.24 g of ascorbic acid yields 7.86 g CO2 and 2.14 g H2O. Calculate the empirical formula and molecular formula for ascorbic acid given that its molar mass is about 176 g. To find the empirical formula we need to know h ...
... 64) Ascorbic acid (vitamin C) contains C, H, and O. In one combustion analysis, 5.24 g of ascorbic acid yields 7.86 g CO2 and 2.14 g H2O. Calculate the empirical formula and molecular formula for ascorbic acid given that its molar mass is about 176 g. To find the empirical formula we need to know h ...
Experiment 7: Determination of the concentration of a solution of an
... Density, d, is defined as the ratio of the two properties, mass, m, and volume, V, i.e. ...
... Density, d, is defined as the ratio of the two properties, mass, m, and volume, V, i.e. ...
48th CHEMISTRY OLYMPIAD CHEMISTRY
... 4. Chemical element X acts as a very strong oxidizing agent. Most of the reactions, in which participates, proceed with explosion or with the formation of a flame. At contact with many metals and nonmetals the reaction takes place already at ambient temperature. Even steam and glass wool (combustibl ...
... 4. Chemical element X acts as a very strong oxidizing agent. Most of the reactions, in which participates, proceed with explosion or with the formation of a flame. At contact with many metals and nonmetals the reaction takes place already at ambient temperature. Even steam and glass wool (combustibl ...
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 ...
Penetration of Synthetic Corticosteroids into Human
... then analysed by GeMS in the negative ion chemical ionisation mode. The undeuterated fluorometholone present in the aqueous humour was identified and quantified with reference to the known amount of deuterated DHP added as an internal standard. (DHP is a suitable internal standard because of the sim ...
... then analysed by GeMS in the negative ion chemical ionisation mode. The undeuterated fluorometholone present in the aqueous humour was identified and quantified with reference to the known amount of deuterated DHP added as an internal standard. (DHP is a suitable internal standard because of the sim ...
Vinnitsa National Pirogov Memorial Medical University Biological
... Biogenic s-elements, p-elements …………………………………………………………8 Biogenic d- elements………………………………………………………………….....11 The formation of complexes in biological systems……………………………………...13 Methods of expressing concentration of solution ……………………....………………16 Acid-base equilibrium in the organism. pH scale of bio ...
... Biogenic s-elements, p-elements …………………………………………………………8 Biogenic d- elements………………………………………………………………….....11 The formation of complexes in biological systems……………………………………...13 Methods of expressing concentration of solution ……………………....………………16 Acid-base equilibrium in the organism. pH scale of bio ...
Calculations and the Chemical Equation
... Atoms are exceedingly small, yet their masses have been experimentally determined for each of the elements. The periodic table provides atomic masses in atomic mass units (amu). A more practical unit for defining a "collection" of atoms is the mole, Avogadro's number of particles. Calculations based ...
... Atoms are exceedingly small, yet their masses have been experimentally determined for each of the elements. The periodic table provides atomic masses in atomic mass units (amu). A more practical unit for defining a "collection" of atoms is the mole, Avogadro's number of particles. Calculations based ...
Contents and Concepts Learning Objectives
... established between the solid and the ions in the saturated solution. ...
... established between the solid and the ions in the saturated solution. ...
Chapter 3
... 3. Start by balancing those elements that appear in only one reactant and one product. 4. Balance those elements that appear in two or more reactants or products. 4. Remove all fractions (generally by multiplying everything by 2) and reduce all stoichiometric coefficients to try to get one equal to ...
... 3. Start by balancing those elements that appear in only one reactant and one product. 4. Balance those elements that appear in two or more reactants or products. 4. Remove all fractions (generally by multiplying everything by 2) and reduce all stoichiometric coefficients to try to get one equal to ...
Solubility and Complex-ion Equilibria
... mixed, the first step in solving the problem is to calculate the new initial concentrations. • Exactly 0.400 L of 0.50 M Pb2+ and 1.60 L of 2.50 × 10−2 M Cl− are mixed together to form 2.00 L of solution. • Calculate Qc and predict whether PbCl2 will precipitate. Ksp for PbCl2 is 1.6 × 10−5. ...
... mixed, the first step in solving the problem is to calculate the new initial concentrations. • Exactly 0.400 L of 0.50 M Pb2+ and 1.60 L of 2.50 × 10−2 M Cl− are mixed together to form 2.00 L of solution. • Calculate Qc and predict whether PbCl2 will precipitate. Ksp for PbCl2 is 1.6 × 10−5. ...
AS Chemistry 1
... We can picture the hydrogen atom — the simplest of all atoms with one electron and one proton in the nucleus — by considering a pea placed in the centre of a football pitch, to represent the nucleus with its proton. On this scale the electron will revolve in a circular orbit round the goalposts. Bet ...
... We can picture the hydrogen atom — the simplest of all atoms with one electron and one proton in the nucleus — by considering a pea placed in the centre of a football pitch, to represent the nucleus with its proton. On this scale the electron will revolve in a circular orbit round the goalposts. Bet ...
Answers
... d) Pb(NO3)2(aq) + 2NaCl(aq) ----------> 2NaNO3(aq) + PbCl2(s) metathesis e) None of these is a displacement reaction The reactions above have been labeled for you. ...
... d) Pb(NO3)2(aq) + 2NaCl(aq) ----------> 2NaNO3(aq) + PbCl2(s) metathesis e) None of these is a displacement reaction The reactions above have been labeled for you. ...
Contents and Concepts Learning Objectives
... • In each case, an equilibrium is established, called the complex-ion formation equilibrium. ...
... • In each case, an equilibrium is established, called the complex-ion formation equilibrium. ...
Gas chromatography–mass spectrometry
Gas chromatography–mass spectrometry (GC-MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample. Applications of GC-MS include drug detection, fire investigation, environmental analysis, explosives investigation, and identification of unknown samples. GC-MS can also be used in airport security to detect substances in luggage or on human beings. Additionally, it can identify trace elements in materials that were previously thought to have disintegrated beyond identification.GC-MS has been widely heralded as a ""gold standard"" for forensic substance identification because it is used to perform a specific test. A specific test positively identifies the actual presence of a particular substance in a given sample. A non-specific test merely indicates that a substance falls into a category of substances. Although a non-specific test could statistically suggest the identity of the substance, this could lead to false positive identification.