Full answers
... • Explain, in terms of chemical bonding and intermolecular forces, the following trend in melting points: CH4 < I2 < NaCl < silica (SiO2) There are only dispersion forces between the molecules in CH4 and I2. The I atom is a large, many-electron atom so its electron cloud is more easily polarised tha ...
... • Explain, in terms of chemical bonding and intermolecular forces, the following trend in melting points: CH4 < I2 < NaCl < silica (SiO2) There are only dispersion forces between the molecules in CH4 and I2. The I atom is a large, many-electron atom so its electron cloud is more easily polarised tha ...
Chemistry Final Exam Review
... 6. What is the relative rate of helium (He) gas vs. chlorine (Cl2) gas? Which one diffuses faster? ...
... 6. What is the relative rate of helium (He) gas vs. chlorine (Cl2) gas? Which one diffuses faster? ...
Chemistry 12 - hrsbstaff.ednet.ns.ca
... 2. A 10.0 g sample of a substance has 34.8 J of energy added to it and its temperature increases by 25.0°C. What is the specific heat capacity of the substance? A. 0.139 J/g°C B. 0.338 J/g°C C. 0.718 J/g°C D. 0.870 J/g°C 3. If the ΔH for a reaction is positive, which of the following statements is t ...
... 2. A 10.0 g sample of a substance has 34.8 J of energy added to it and its temperature increases by 25.0°C. What is the specific heat capacity of the substance? A. 0.139 J/g°C B. 0.338 J/g°C C. 0.718 J/g°C D. 0.870 J/g°C 3. If the ΔH for a reaction is positive, which of the following statements is t ...
Instruction Manual, Affi-Gel® 102 and CM Bio-Gel® A Gels - Bio-Rad
... 1. Dilute the gel 1 to 1 with distilled water or appropriate solvent.* 2. With gentle stirring (end over end, do not use a stir bar), add 10-50 µ moles of ligand/ml of gel (35-40 mg protein ml gel) and adjust the pH to 4.7-5.0 with 1 N HCl. 3. Add 2-10 mg EDAC coupling reagent with continued stirrin ...
... 1. Dilute the gel 1 to 1 with distilled water or appropriate solvent.* 2. With gentle stirring (end over end, do not use a stir bar), add 10-50 µ moles of ligand/ml of gel (35-40 mg protein ml gel) and adjust the pH to 4.7-5.0 with 1 N HCl. 3. Add 2-10 mg EDAC coupling reagent with continued stirrin ...
10th CBSE {SA - 1} Revision Pack Booklet - 3
... No, all metals do not react with caustic soda. 8. To an aqueous solution of sodium hydroxide, a few drops of phenolphthalein were added. What do you observe? To this solution small amount of dilute HCl was added. What do you observe now? Explain your answer. ...
... No, all metals do not react with caustic soda. 8. To an aqueous solution of sodium hydroxide, a few drops of phenolphthalein were added. What do you observe? To this solution small amount of dilute HCl was added. What do you observe now? Explain your answer. ...
AS specification - word format File
... specification and draw these compounds, as they are encountered in the specification, using structural, displayed and skeletal formulae c appreciate the difference between hazard and risk d demonstrate an understanding of the hazards associated with organic compounds and why it is necessary to carry ...
... specification and draw these compounds, as they are encountered in the specification, using structural, displayed and skeletal formulae c appreciate the difference between hazard and risk d demonstrate an understanding of the hazards associated with organic compounds and why it is necessary to carry ...
Le Chatelier`s Principle in Iron Thiocyanate Equilibrium
... Introduction Chemical equilibrium exists when two opposing reactions occur simultaneously at the same rate. Changes in experimental conditions such as concentration, pressure, volume, and temperature disturb the balance and shift the equilibrium position so that more or less of the desired product i ...
... Introduction Chemical equilibrium exists when two opposing reactions occur simultaneously at the same rate. Changes in experimental conditions such as concentration, pressure, volume, and temperature disturb the balance and shift the equilibrium position so that more or less of the desired product i ...
Preparation of spherical DDNP study Liu off on a journey
... To avoid local violent reaction, the stirring speed is kept appropriate to make a dropwise rapid dispersion of sodium to the reaction solution, but it is easy to excessively and break ammonia salt crystals. Reduction through strict control of the reaction conditions, the alkaline liquor can be recyc ...
... To avoid local violent reaction, the stirring speed is kept appropriate to make a dropwise rapid dispersion of sodium to the reaction solution, but it is easy to excessively and break ammonia salt crystals. Reduction through strict control of the reaction conditions, the alkaline liquor can be recyc ...
CH1710 PrEX#2 Sp2013 answers
... _____12. How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.35 L of a 3.5 M solution? A. 0. 14 mL C. 140 mL ...
... _____12. How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.35 L of a 3.5 M solution? A. 0. 14 mL C. 140 mL ...
4th NOTES - Idaho State University
... For the case where the heat capacity of a calorimeter and its contents are known. Qtot = C C = heat capacity of the calorimeter and substances in it! C = Ccalorimeter + Ccontents If the Reaction is carried out in Dilute aqeous solution and Ccal = 0 Q = sp.htH2O * mH2O * T sp. ht. = J/(g ...
... For the case where the heat capacity of a calorimeter and its contents are known. Qtot = C C = heat capacity of the calorimeter and substances in it! C = Ccalorimeter + Ccontents If the Reaction is carried out in Dilute aqeous solution and Ccal = 0 Q = sp.htH2O * mH2O * T sp. ht. = J/(g ...
File
... ΔH° for the above reaction = +15 kilocalories The forward reaction is slow at room temperature but becomes rapid when a catalyst is added. (a) Draw a diagram of potential energy vs reaction coordinate for the uncatalyzed reaction. On this diagram label: (1) the axes (2) the energies of the reactants ...
... ΔH° for the above reaction = +15 kilocalories The forward reaction is slow at room temperature but becomes rapid when a catalyst is added. (a) Draw a diagram of potential energy vs reaction coordinate for the uncatalyzed reaction. On this diagram label: (1) the axes (2) the energies of the reactants ...
CHAPTER-7 EQUILIBRIUM Equilibrium state- When
... Buffer solution :The solutions which resist change in pH on dilution or with the addition of small amounts of acid or alkali are called Buffer Solutions. common ion effect: It can be defined as a shift in equilibrium on adding a substance that provides more of an ionic species already present in ...
... Buffer solution :The solutions which resist change in pH on dilution or with the addition of small amounts of acid or alkali are called Buffer Solutions. common ion effect: It can be defined as a shift in equilibrium on adding a substance that provides more of an ionic species already present in ...
Spectroscopic Characterization of Mixed Fe−Ni
... system for their oxygen evolution capability.20 These electrodeposited films showed higher oxygen evolution activity compared to that of pure Ni or Fe oxide. Miller also investigated a mixed Ni−Fe oxide system by reactively sputtering films of Ni−Fe onto a support and noted a similar increase in activ ...
... system for their oxygen evolution capability.20 These electrodeposited films showed higher oxygen evolution activity compared to that of pure Ni or Fe oxide. Miller also investigated a mixed Ni−Fe oxide system by reactively sputtering films of Ni−Fe onto a support and noted a similar increase in activ ...
Kinetic energy
... 12. Kelly is building a model of a volcano. Her plan involves combining baking soda and vinegar to simulate the eruption of the volcano. She tests the reaction in a glass beaker first. When a small amount of baking soda and vinegar combine, carbon dioxide is produced, along with some foam and fizz ...
... 12. Kelly is building a model of a volcano. Her plan involves combining baking soda and vinegar to simulate the eruption of the volcano. She tests the reaction in a glass beaker first. When a small amount of baking soda and vinegar combine, carbon dioxide is produced, along with some foam and fizz ...
Catalysis
Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst. With a catalyst, reactions occur faster and require less activation energy. Because catalysts are not consumed in the catalyzed reaction, they can continue to catalyze the reaction of further quantities of reactant. Often only tiny amounts are required.