IChO 2012
... A unifying idea in chemistry is the theory of acid-base behavior put forward by G. N. Lewis (1875–1946) early in the 20 th century. That is, acids are electron-pair acceptors, whereas bases are electron-pair donors. There are thousands of molecules that can be classified as Lewis acids or bases, and ...
... A unifying idea in chemistry is the theory of acid-base behavior put forward by G. N. Lewis (1875–1946) early in the 20 th century. That is, acids are electron-pair acceptors, whereas bases are electron-pair donors. There are thousands of molecules that can be classified as Lewis acids or bases, and ...
chapter_14 Equilibr
... condensed phase are expressed in M. In the gaseous phase, the concentrations can be expressed in M or in atm. 2. The concentrations of pure solids, pure liquids and solvents do not appear in the equilibrium constant expressions. 3. The equilibrium constant is a dimensionless quantity. 4. In quoting ...
... condensed phase are expressed in M. In the gaseous phase, the concentrations can be expressed in M or in atm. 2. The concentrations of pure solids, pure liquids and solvents do not appear in the equilibrium constant expressions. 3. The equilibrium constant is a dimensionless quantity. 4. In quoting ...
379 - FTP
... are 1.63V and –0.13V, respectively. A saturated solution of chlorine at 25°C consists of about 33% hypochlorous acid. The acid is unstable in water. It reacts with hypochlorite ion forming chlorate: 2HOCl + OCl¯ → ClO3̄ + 2H+ + 2Cl¯, dissociation constant 3.4 x 10–8. Hypochlorous acid is a strong ox ...
... are 1.63V and –0.13V, respectively. A saturated solution of chlorine at 25°C consists of about 33% hypochlorous acid. The acid is unstable in water. It reacts with hypochlorite ion forming chlorate: 2HOCl + OCl¯ → ClO3̄ + 2H+ + 2Cl¯, dissociation constant 3.4 x 10–8. Hypochlorous acid is a strong ox ...
Chemical Equilibrium is reached when
... However, in 1 L of water we have 55.5 M of water which is very large compared with the concentrations of other species in solution, and we assume that it doesn’t change during the course of a reaction. Kc = [CH3COO-][H3O+]/[CH3COOH] Kc = Kc`[H2O] Note that it is general practice not to include units ...
... However, in 1 L of water we have 55.5 M of water which is very large compared with the concentrations of other species in solution, and we assume that it doesn’t change during the course of a reaction. Kc = [CH3COO-][H3O+]/[CH3COOH] Kc = Kc`[H2O] Note that it is general practice not to include units ...
Chemical Reactions
... 1. Give the student the formula of barium hydroxide and sulfuric acid and ask them to predict the product of the reaction. 2. To a 250-mL beaker add 30 mL of 0.1 M sulfuric acid. 3. To the beaker add 50 mL of water and 2 drops of phenolphthalein. 4. Ask the student for their opinion as why the water ...
... 1. Give the student the formula of barium hydroxide and sulfuric acid and ask them to predict the product of the reaction. 2. To a 250-mL beaker add 30 mL of 0.1 M sulfuric acid. 3. To the beaker add 50 mL of water and 2 drops of phenolphthalein. 4. Ask the student for their opinion as why the water ...
Chemistry - Higher tier - Paper 4 - Sample assessment material
... • Complete the boxes above with your name, centre number and candidate number. • Answer all the questions. • Write your answer to each question in the space provided. • Additional paper may be used if required but you must clearly show your candidate number, centre number and question number(s). • D ...
... • Complete the boxes above with your name, centre number and candidate number. • Answer all the questions. • Write your answer to each question in the space provided. • Additional paper may be used if required but you must clearly show your candidate number, centre number and question number(s). • D ...
formula writing and nomenclature of inorganic compounds
... as copper, iron, tin, and others exhibit more than one oxidation number. In these cases, the name of the element is followed by the oxidation number in Roman numerals in parenthesis. (These elements are summarized in Table 2) The case of nitrogen and phosphorus are discussed in ...
... as copper, iron, tin, and others exhibit more than one oxidation number. In these cases, the name of the element is followed by the oxidation number in Roman numerals in parenthesis. (These elements are summarized in Table 2) The case of nitrogen and phosphorus are discussed in ...
Module Seven - DePauw University
... And, of course, it is trivial to measure the mass of a solid using a laboratory balance. What about reagents that are not solids, such as liquids and solutions? † The mass of a pure liquid can be measured directly in grams, although it is often more convenient to measure its volume and calculate its ...
... And, of course, it is trivial to measure the mass of a solid using a laboratory balance. What about reagents that are not solids, such as liquids and solutions? † The mass of a pure liquid can be measured directly in grams, although it is often more convenient to measure its volume and calculate its ...
SrF 2(s)
... A. For each of the following reactions, identify the reaction type and balance the reaction. ________________1. _____Al(s) + _____O2(g) ...
... A. For each of the following reactions, identify the reaction type and balance the reaction. ________________1. _____Al(s) + _____O2(g) ...
Biological Buffers
... Depending on the buffer substance, its pH may vary with temperature. It is therefore advisable, as far as possible, to set the pH at the working temperature to be used for the investigation. The physiological pH value for most animal cells at 37°C is between 7.0 and 7.5. One buffer particularly susc ...
... Depending on the buffer substance, its pH may vary with temperature. It is therefore advisable, as far as possible, to set the pH at the working temperature to be used for the investigation. The physiological pH value for most animal cells at 37°C is between 7.0 and 7.5. One buffer particularly susc ...
Chapter - Archie Main Page
... group. These polar attractions create organization among water molecules. Recall that a water molecule has two strong covalent bonds between the oxygen atom and the hydrogen atoms. The force that holds neighboring water molecules together is called a hydrogen bond. A hydrogen bond is an intermolecul ...
... group. These polar attractions create organization among water molecules. Recall that a water molecule has two strong covalent bonds between the oxygen atom and the hydrogen atoms. The force that holds neighboring water molecules together is called a hydrogen bond. A hydrogen bond is an intermolecul ...
ap chemistry 2005/2006
... thermochemical reactions, identification of endothermic or exothermic, identification as physical or chemical change. Lab: Determining the Specific Heat of an Unknown Metal – the specific heat capacity of a nail will be experimentally determined by measuring the temperature change of water and of th ...
... thermochemical reactions, identification of endothermic or exothermic, identification as physical or chemical change. Lab: Determining the Specific Heat of an Unknown Metal – the specific heat capacity of a nail will be experimentally determined by measuring the temperature change of water and of th ...
Derivatization reagents
... ● Supplied with elastomer septa, allowing immediate access to the sample without exposure to moisture and oxygen ● Use polar solvents (acetonitrile, dimethylformamide, dimethylsulfoxide, pyridine, tetrahyrdrofuran) to facilitate reactions; nonpolar organic solvents may be used, but they will not acc ...
... ● Supplied with elastomer septa, allowing immediate access to the sample without exposure to moisture and oxygen ● Use polar solvents (acetonitrile, dimethylformamide, dimethylsulfoxide, pyridine, tetrahyrdrofuran) to facilitate reactions; nonpolar organic solvents may be used, but they will not acc ...
Acetaminophen
... and a carboxylic acid group. It is an acidic compound and dissolves in basic solutions (in which aspirin is converted into a water-soluble salt) but not in neutral or acidic aqueous solutions. It is also soluble in some organic solvents such as dichloromethane (CH2Cl2). On the other hand, acetaminop ...
... and a carboxylic acid group. It is an acidic compound and dissolves in basic solutions (in which aspirin is converted into a water-soluble salt) but not in neutral or acidic aqueous solutions. It is also soluble in some organic solvents such as dichloromethane (CH2Cl2). On the other hand, acetaminop ...