Name
... 47. 50.00 mL of HNO3 was titrated with 0.100 M NaOH and the graph below was created. a. On the graph, draw an X at the equivalence point. b. How many mL of NaOH were added at the equivalence point? _______________ ...
... 47. 50.00 mL of HNO3 was titrated with 0.100 M NaOH and the graph below was created. a. On the graph, draw an X at the equivalence point. b. How many mL of NaOH were added at the equivalence point? _______________ ...
Shifting Equilibrium
... because changing the temperature changes the relative amounts of reactants and products. Increasing the temperature is, in effect, the addition of energy in the form of heat. According to Le Châtelier’s principle, the stress of the added heat will be lessened by shifting the equilibrium in the direc ...
... because changing the temperature changes the relative amounts of reactants and products. Increasing the temperature is, in effect, the addition of energy in the form of heat. According to Le Châtelier’s principle, the stress of the added heat will be lessened by shifting the equilibrium in the direc ...
H o - CashmereChemistry
... Energy loss by hot water = Energy gained by cool water E lost = E gained (conservation of energy) ∆H(loss) = ∆H (gained) ...
... Energy loss by hot water = Energy gained by cool water E lost = E gained (conservation of energy) ∆H(loss) = ∆H (gained) ...
Chemical Equilibrium – Le Chatelier`s Principle
... What is the color of methyl violet in water ? What reagent causes a color change? What reagent causes a shift back to the original color? In terms of equilibrium of reaction (2), explain why the reagents for Steps 2 and 3 worked. Part B. Solubility Equilibrium; Finding a Value for Ksp Calculate the ...
... What is the color of methyl violet in water ? What reagent causes a color change? What reagent causes a shift back to the original color? In terms of equilibrium of reaction (2), explain why the reagents for Steps 2 and 3 worked. Part B. Solubility Equilibrium; Finding a Value for Ksp Calculate the ...
Solids Chemistry XII - The Gurukul Institute
... other whose particles are very small, what kind of solid solution in this likely to be? Define ‘mole fraction of a component’ in a solution. Write an expression for mole fraction of a component ‘A’ present in a solution with another component ‘B’. What is the sum of the mole fractions of all the com ...
... other whose particles are very small, what kind of solid solution in this likely to be? Define ‘mole fraction of a component’ in a solution. Write an expression for mole fraction of a component ‘A’ present in a solution with another component ‘B’. What is the sum of the mole fractions of all the com ...
Prebiotic synthesis from CO atmospheres: Implications for the
... originated suggest that the atmosphere was dominated by carbon dioxide, largely based on the notion that the atmosphere was derived via volcanic outgassing, and that those gases were similar to those found in modern volcanic effluent. These models tend to downplay the possibility of a strongly reduc ...
... originated suggest that the atmosphere was dominated by carbon dioxide, largely based on the notion that the atmosphere was derived via volcanic outgassing, and that those gases were similar to those found in modern volcanic effluent. These models tend to downplay the possibility of a strongly reduc ...
Ch 10 - Enrico Fermi High School
... ___ 1. The vapor pressure of the solvent over beaker B ___ the vapor pressure of the solvent over beaker A. ___ 2. The boiling point elevation of beaker B __ the boiling point elevation of beaker A. ___ 3. The vapor pressure pure compound Q ___ the vapor pressure of the solvent in beaker B. __4. The ...
... ___ 1. The vapor pressure of the solvent over beaker B ___ the vapor pressure of the solvent over beaker A. ___ 2. The boiling point elevation of beaker B __ the boiling point elevation of beaker A. ___ 3. The vapor pressure pure compound Q ___ the vapor pressure of the solvent in beaker B. __4. The ...
12_chemistry_impq_CH13_amines_02
... The hydrogen attached to nitrogen in sulphonamide is strongly acidic due to the presence of strong electron withdrawing sulphonyl group. Hence, it is soluble in alkali. (b) In the reaction with secondary amine, N,N-diethylbenzenesulphonamide is formed. ...
... The hydrogen attached to nitrogen in sulphonamide is strongly acidic due to the presence of strong electron withdrawing sulphonyl group. Hence, it is soluble in alkali. (b) In the reaction with secondary amine, N,N-diethylbenzenesulphonamide is formed. ...
Experimental skills and abilities
... Given the time scale of one practical session, the results can be improved by taking more than one session. The earthy material residue can have more water added and more salt extracted. Carry out the process at least another two times. This will increase the amount of salt in solution to eventually ...
... Given the time scale of one practical session, the results can be improved by taking more than one session. The earthy material residue can have more water added and more salt extracted. Carry out the process at least another two times. This will increase the amount of salt in solution to eventually ...
Acidic Environment by Ahmad Shah Idil
... An exothermic reaction is one that produces heat energy. For exothermic reactions, the sign of the change in heat (ΔH) is NEGATIVE. In terms of reversible reactions, exothermic reactions produce heat through the forward reaction, but absorb heat in the reverse reaction. An endothermic reaction ...
... An exothermic reaction is one that produces heat energy. For exothermic reactions, the sign of the change in heat (ΔH) is NEGATIVE. In terms of reversible reactions, exothermic reactions produce heat through the forward reaction, but absorb heat in the reverse reaction. An endothermic reaction ...
2007 - SAASTA
... (1) CH4 (g) + O2 (g) → CO2 (g) + H2O (l) (2) CaO (s) + CO2 (g) → CaCO3 (s) (3) Mg (s) + O2 (g) → MgO (s) ...
... (1) CH4 (g) + O2 (g) → CO2 (g) + H2O (l) (2) CaO (s) + CO2 (g) → CaCO3 (s) (3) Mg (s) + O2 (g) → MgO (s) ...
Energy
... Since enthalpy is a state function (path independent) the change in enthalpy for the combination of the first two processes has to be the same as the change in enthalpy for the third process. This is a simple example of a general principle called Hess’ law. ...
... Since enthalpy is a state function (path independent) the change in enthalpy for the combination of the first two processes has to be the same as the change in enthalpy for the third process. This is a simple example of a general principle called Hess’ law. ...
Document
... 12. A given volume of methane (CH4) diffuses from a certain apparatus in 96 seconds. The same volume of a gas x diffuses from the same apparatus under similar conditions in 88 seconds. Calculate the relative molecular mass of gas x ( C = 12, H = 1 ) ( 3 Marks ) ...
... 12. A given volume of methane (CH4) diffuses from a certain apparatus in 96 seconds. The same volume of a gas x diffuses from the same apparatus under similar conditions in 88 seconds. Calculate the relative molecular mass of gas x ( C = 12, H = 1 ) ( 3 Marks ) ...
STOICHIOMETRY:
... The word stoichiometry derives from two Greek words: stoicheion (meaning "element") and metron (meaning "measure"). Stoichiometry deals with calculations about the masses, volumes or concentrations of reactants and products involved in a chemical reaction. The reason we balance chemical reactions is ...
... The word stoichiometry derives from two Greek words: stoicheion (meaning "element") and metron (meaning "measure"). Stoichiometry deals with calculations about the masses, volumes or concentrations of reactants and products involved in a chemical reaction. The reason we balance chemical reactions is ...
Topic 14 - Fertilisers
... Ammonia has a characteristic pungent smell. Ammonia is very soluble in water as shown by the fountain experiment. ...
... Ammonia has a characteristic pungent smell. Ammonia is very soluble in water as shown by the fountain experiment. ...
Chapter 4: Reactions in Aqueous Solution
... 1) Water is a very common solvent due to its wide availability and low cost (most of our world is water). 2) Many reactions take place in aqueous solution. The term aqueous means dissolved in water. 3) Hydration of solids in Water A) Solid dissolves (falls apart) through interaction of ions with wat ...
... 1) Water is a very common solvent due to its wide availability and low cost (most of our world is water). 2) Many reactions take place in aqueous solution. The term aqueous means dissolved in water. 3) Hydration of solids in Water A) Solid dissolves (falls apart) through interaction of ions with wat ...
Sample Final Questions Key/FS12
... b. For this data set would you calculate the standard deviation or the standard deviation estimate? Explain why. You would use the standard deviation estimate because you had a small sample population. (The standard deviation estimate represents a greater percentage of the population than the standa ...
... b. For this data set would you calculate the standard deviation or the standard deviation estimate? Explain why. You would use the standard deviation estimate because you had a small sample population. (The standard deviation estimate represents a greater percentage of the population than the standa ...
Chemistry
... social needs. This includes addressing the global challenges of climate change and security of water, food and energy supplies, and designing processes to maximise the efficient use of Earth’s finite resources. Studying Chemistry provides a student opportunity to explore key concepts, models and the ...
... social needs. This includes addressing the global challenges of climate change and security of water, food and energy supplies, and designing processes to maximise the efficient use of Earth’s finite resources. Studying Chemistry provides a student opportunity to explore key concepts, models and the ...
Safety Data Sheet - Fisher Scientific
... Name: 49CFR173.242 Ship type: Not Applicable Pollution category: Y Special precautions for user: N34: Aluminum construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material.A3: For combination packagings, if glass inner packagings (inc ...
... Name: 49CFR173.242 Ship type: Not Applicable Pollution category: Y Special precautions for user: N34: Aluminum construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material.A3: For combination packagings, if glass inner packagings (inc ...
Thail 1 - University of Missouri
... It has been known for some time that the properties of large molecules can be considered made up of the additive contribution of atoms or bonds. The physical basis for this appears to be that the forces between atoms are fairly short range, of the order of 1 to 3 Å. 3. Group additivity Group additiv ...
... It has been known for some time that the properties of large molecules can be considered made up of the additive contribution of atoms or bonds. The physical basis for this appears to be that the forces between atoms are fairly short range, of the order of 1 to 3 Å. 3. Group additivity Group additiv ...
Multiple Pathways To Success Quarter 3 Learning Module
... patterns of electrons in the outermost energy level of atoms. HS-PS1-2 Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties. HS-PS3-2 Devel ...
... patterns of electrons in the outermost energy level of atoms. HS-PS1-2 Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties. HS-PS3-2 Devel ...
Stoichiometry - hrsbstaff.ednet.ns.ca
... do a lab involving different bond types classify ionic, molecular, and metallic substances according to their properties define, explain, and write Lewis structures define and identify single, double, and triple covalent bonds define a metallic bond, and use it to explain bonding within metals demon ...
... do a lab involving different bond types classify ionic, molecular, and metallic substances according to their properties define, explain, and write Lewis structures define and identify single, double, and triple covalent bonds define a metallic bond, and use it to explain bonding within metals demon ...
AP Chemistry Summer Assignment
... **You will also need to learn which acids and bases are strong (CBSPIN) and which are weak. A simple way to remember acids: all binary acids, except HF are strong. Oxyacids (contain polyatomic ions) are strong if there are two or more oxygen atoms than hydrogen atoms: H2SO4 = strong H2SO3 = weak ...
... **You will also need to learn which acids and bases are strong (CBSPIN) and which are weak. A simple way to remember acids: all binary acids, except HF are strong. Oxyacids (contain polyatomic ions) are strong if there are two or more oxygen atoms than hydrogen atoms: H2SO4 = strong H2SO3 = weak ...
Lewis acid catalysis
In Lewis acid catalysis of organic reactions, a metal-based Lewis acid acts as an electron pair acceptor to increase the reactivity of a substrate. Common Lewis acid catalysts are based on main group metals such as aluminum, boron, silicon, and tin, as well as many early (titanium, zirconium) and late (iron, copper, zinc) d-block metals. The metal atom forms an adduct with a lone-pair bearing electronegative atom in the substrate, such as oxygen (both sp2 or sp3), nitrogen, sulfur, and halogens. The complexation has partial charge-transfer character and makes the lone-pair donor effectively more electronegative, activating the substrate toward nucleophilic attack, heterolytic bond cleavage, or cycloaddition with 1,3-dienes and 1,3-dipoles.Many classical reactions involving carbon–carbon or carbon–heteroatom bond formation can be catalyzed by Lewis acids. Examples include the Friedel-Crafts reaction, the aldol reaction, and various pericyclic processes that proceed slowly at room temperature, such as the Diels-Alder reaction and the ene reaction. In addition to accelerating the reactions, Lewis acid catalysts are able to impose regioselectivity and stereoselectivity in many cases.Early developments in Lewis acid reagents focused on easily available compounds such as TiCl4, BF3, SnCl4, and AlCl3. The relative strengths of these (and other) Lewis acids may be estimated from NMR spectroscopy by the Childs method or the Gutmann-Beckett method. Over the years, versatile catalysts bearing ligands designed for specific applications have facilitated improvement in both reactivity and selectivity of Lewis acid-catalyzed reactions. More recently, Lewis acid catalysts with chiral ligands have become an important class of tools for asymmetric catalysis.Challenges in the development of Lewis acid catalysis include inefficient catalyst turnover (caused by catalyst affinity for the product) and the frequent requirement of two-point binding for stereoselectivity, which often necessitates the use of auxiliary groups.