Unit - II Electrochemistry
... where ‘a’ is the activity of the species. The activity of a (homogenous / uniform) solid is taken as unity, that of the electrolyte expressed in terms of the concentration and that of a gas (or gaseous mixture) expressed in terms of pressure (or partial pressure) of the gas. Equation (4) can be wri ...
... where ‘a’ is the activity of the species. The activity of a (homogenous / uniform) solid is taken as unity, that of the electrolyte expressed in terms of the concentration and that of a gas (or gaseous mixture) expressed in terms of pressure (or partial pressure) of the gas. Equation (4) can be wri ...
chapter 6: chemical reactions: an introduction
... The same number of each kind of atom must be present before and after a chemical reaction. In other words, the equation must be balanced. For example, when hydrogen gas and oxygen gas react to form water vapor, the chemical equation must have hydrogen and oxygen atoms on both sides of the chemical e ...
... The same number of each kind of atom must be present before and after a chemical reaction. In other words, the equation must be balanced. For example, when hydrogen gas and oxygen gas react to form water vapor, the chemical equation must have hydrogen and oxygen atoms on both sides of the chemical e ...
Dipole Moment
... Polarities of X-H bonds increase upon hydrogen-bond formation, often leading to complexes whose dipole moments are larger than those expected from vectorial addition. Nuclear-magnetic-resonance (NMR) chemical shifts of protons in hydrogen bonds are substantially smaller than those observed in the co ...
... Polarities of X-H bonds increase upon hydrogen-bond formation, often leading to complexes whose dipole moments are larger than those expected from vectorial addition. Nuclear-magnetic-resonance (NMR) chemical shifts of protons in hydrogen bonds are substantially smaller than those observed in the co ...
Entropy and reaction spontaneity Gibbs free energy
... The standard free energy of formation, ∆G0f , of a compound is the standard reaction free energy per mole for its synthesis from elements in their most stable forms. Standard free energies of elements in their most stable forms are equal to zero at 298K. Physical Chemistry EPM/04 ...
... The standard free energy of formation, ∆G0f , of a compound is the standard reaction free energy per mole for its synthesis from elements in their most stable forms. Standard free energies of elements in their most stable forms are equal to zero at 298K. Physical Chemistry EPM/04 ...
Notes
... • Oxidation potential measures the strength of reducing agents. When the reduction half-‐reactions is read backwards, they are oxidation half reactions. In other words, oxidation potentials of reducing agents are ...
... • Oxidation potential measures the strength of reducing agents. When the reduction half-‐reactions is read backwards, they are oxidation half reactions. In other words, oxidation potentials of reducing agents are ...
Question, hints, and answers. Look at hints if you need help. Look at
... Molecules in a sample of NH3(l) are held closely together by intermolecular forces *hint In the NH3 molecule, there is a covalent bond between N and H. But the N "wants" the electrons more than the H does, so it pulls them closer to itself. You end up with a little more than half the negative charge ...
... Molecules in a sample of NH3(l) are held closely together by intermolecular forces *hint In the NH3 molecule, there is a covalent bond between N and H. But the N "wants" the electrons more than the H does, so it pulls them closer to itself. You end up with a little more than half the negative charge ...
Solute
... • Polar H2O molecules surround positive and negative ions and break apart crystal lattice • Water molecules move away (diffusion) so the process is repeated Show animation ...
... • Polar H2O molecules surround positive and negative ions and break apart crystal lattice • Water molecules move away (diffusion) so the process is repeated Show animation ...
ASPEN_Home_exercise1_ 27.01.16_with_answers
... First we have to define the units in the simulation, In the Menu at the left chose setup, then chose Specification. Chose METCBAR as the global unit set. On the setup sheet you can choose unit of measurement for input and output data. If you want to define an own units press Units sets new. Give a n ...
... First we have to define the units in the simulation, In the Menu at the left chose setup, then chose Specification. Chose METCBAR as the global unit set. On the setup sheet you can choose unit of measurement for input and output data. If you want to define an own units press Units sets new. Give a n ...
10 PRE-LABORATORY ASSIGNMENT EXPERIMENT 7 1. Is t
... The calorimeter and the thermometer setup will be the same as that used in Part A. Rinse the inner cup of your calorimeter thoroughly with deionized water and dry. Assemble your calorimeter, being certain that there is no water in the space between the two cups. Check out a thermometer from your ...
... The calorimeter and the thermometer setup will be the same as that used in Part A. Rinse the inner cup of your calorimeter thoroughly with deionized water and dry. Assemble your calorimeter, being certain that there is no water in the space between the two cups. Check out a thermometer from your ...
1. Naturally occurring boron consists of two isotopes, boron–10 and
... vacuum flask, which is sealed and heated. The BCl3NH 3 decomposes completely according to the balanced equation above. If the flask's temperature is 375. K, the total pressure in the flask is closest to which of the following? (Use R = 0.08 L•atm/mol•K) A) 6.0 atm C) 3.0 atm E) 7.5 atm ...
... vacuum flask, which is sealed and heated. The BCl3NH 3 decomposes completely according to the balanced equation above. If the flask's temperature is 375. K, the total pressure in the flask is closest to which of the following? (Use R = 0.08 L•atm/mol•K) A) 6.0 atm C) 3.0 atm E) 7.5 atm ...
p Block Elements General Configuration: ns2 np1
... Nitrogen differs from the rest of the members of this group due to its smaller size, high electro negativity, high ionization enthalpy and non-availability of d-orbitals. Nitrogen can form pπ-pπ multiple bond. Nitrogen exists as diatomic molecule with a triple bond. Heavier elements do not form pπ-p ...
... Nitrogen differs from the rest of the members of this group due to its smaller size, high electro negativity, high ionization enthalpy and non-availability of d-orbitals. Nitrogen can form pπ-pπ multiple bond. Nitrogen exists as diatomic molecule with a triple bond. Heavier elements do not form pπ-p ...
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 ...
Ch 9 Pkt - mvhs
... Ch. 9 Review: Stoichiometry 1. The following equation represents a laboratory preparation for oxygen gas: 2KClO3(s) + heat 2KCl(s) + 3O2(g) How many moles of O2 form as 3.0 mol of KClO3 are totally consumed? ...
... Ch. 9 Review: Stoichiometry 1. The following equation represents a laboratory preparation for oxygen gas: 2KClO3(s) + heat 2KCl(s) + 3O2(g) How many moles of O2 form as 3.0 mol of KClO3 are totally consumed? ...
Gas Volumes and the Ideal Gas Law
... atoms, which turns out to be correct. The simplest possible molecule of water indicated two hydrogen atoms and one oxygen atom per molecule, which is also correct. Experiments eventually showed that all elements that are gases near room temperature, except the noble gases, normally exist as diatomic ...
... atoms, which turns out to be correct. The simplest possible molecule of water indicated two hydrogen atoms and one oxygen atom per molecule, which is also correct. Experiments eventually showed that all elements that are gases near room temperature, except the noble gases, normally exist as diatomic ...
Chemical Reactions - Waukee Community School District Blogs
... reactants are aqueous the reaction is classified as a precipitate reaction. 4. If all of the products are (aq) then the reaction is NOT a ppt rxn and is classified as double displacement. ...
... reactants are aqueous the reaction is classified as a precipitate reaction. 4. If all of the products are (aq) then the reaction is NOT a ppt rxn and is classified as double displacement. ...
chem 13 news 2010 - University of Waterloo
... its ground electronic state? The atomic number of manganese is Z = 25. ...
... its ground electronic state? The atomic number of manganese is Z = 25. ...
Types of Chemical Reactions
... 2. For each of the following reactants, use the activity series to determine whether the reaction would take place or not. If no reaction takes place, write NR in the blank. If a reaction does take place, write the formulas for the products of the reaction. (Hint: If an active metal replaces the hyd ...
... 2. For each of the following reactants, use the activity series to determine whether the reaction would take place or not. If no reaction takes place, write NR in the blank. If a reaction does take place, write the formulas for the products of the reaction. (Hint: If an active metal replaces the hyd ...
SPRING 2002 Test 2 1. Which of the following statements is
... A. always providing a surface on which molecules react B. changing the products formed in the reaction C. providing an alternate pathway for the reaction with generally lower activation energy D. changing the frequency of collisions between molecules E. increasing the number of collisions of molecul ...
... A. always providing a surface on which molecules react B. changing the products formed in the reaction C. providing an alternate pathway for the reaction with generally lower activation energy D. changing the frequency of collisions between molecules E. increasing the number of collisions of molecul ...
H3AsO4 + 3 I- + 2 H3O+ H3AsO3 + I3- + H2O
... the orbital in space. For a given value of l, ml can have integral values ranging from –l to +l. The spin quantum number ms defines the orientation of the electron's magnetic field and has two possible values +½ and –½. The Pauli Exclusion Principle states that no two electrons in an atom can have ...
... the orbital in space. For a given value of l, ml can have integral values ranging from –l to +l. The spin quantum number ms defines the orientation of the electron's magnetic field and has two possible values +½ and –½. The Pauli Exclusion Principle states that no two electrons in an atom can have ...
Chapter 2. The Chemical Context of Life
... electrons - it is Positively Charged ➲ If an atom has more electrons than protons it is Negatively Charged. ➲ Atoms of opposite charge are attracted to each other. ➲ There are three types of chemical bonds. Ionic bonds, Covalent Bonds, & Hydrogen bonds. ...
... electrons - it is Positively Charged ➲ If an atom has more electrons than protons it is Negatively Charged. ➲ Atoms of opposite charge are attracted to each other. ➲ There are three types of chemical bonds. Ionic bonds, Covalent Bonds, & Hydrogen bonds. ...
1. some basic concepts of chemistry
... 2. Law of Definite Proportions (Law of definite composition): This law was proposed by Joseph Proust. It states that a given compound always contains exactly the same proportion of elements by weight. Or, the same compound always contains the same elements combined in a fixed ratio by mass. Illustr ...
... 2. Law of Definite Proportions (Law of definite composition): This law was proposed by Joseph Proust. It states that a given compound always contains exactly the same proportion of elements by weight. Or, the same compound always contains the same elements combined in a fixed ratio by mass. Illustr ...
+ H 2 (g)
... Physical states of substances are shown by; (g) = gas, (l) = liquid, (s) = solid, and (aq) = aqueous, which indicates substance is dissolved in water. Balancing an equation means adjusting coefficients so that there is the same number of atoms of each element on the left and right sides of the equat ...
... Physical states of substances are shown by; (g) = gas, (l) = liquid, (s) = solid, and (aq) = aqueous, which indicates substance is dissolved in water. Balancing an equation means adjusting coefficients so that there is the same number of atoms of each element on the left and right sides of the equat ...
Chapter 19
... amount of a pure substance by one degree. Specific heat - The amount of heat needed to raise the temperature of one gram of a substance by 1 C (or 1 K) •SI unit for specific heat is joules per gram-1 Kelvin-1 (J/g-K) Calorie - The specific heat of water = 4.184 J/g-K Molar heat capacity - The amount ...
... amount of a pure substance by one degree. Specific heat - The amount of heat needed to raise the temperature of one gram of a substance by 1 C (or 1 K) •SI unit for specific heat is joules per gram-1 Kelvin-1 (J/g-K) Calorie - The specific heat of water = 4.184 J/g-K Molar heat capacity - The amount ...
English Medium
... A. NaOH+HCl → NaCl+H2O 2. What is the gas liberated when an acid reacts with a metal? How do you test that gas? A. The gas liberated is H2. When a burning match stick is bought near to the H2 gas, it puts off with a 'pop' sound. 3. Ca(OH)2+Cl2 → CaOCl2+H2O. What is the bleaching agent in this reacti ...
... A. NaOH+HCl → NaCl+H2O 2. What is the gas liberated when an acid reacts with a metal? How do you test that gas? A. The gas liberated is H2. When a burning match stick is bought near to the H2 gas, it puts off with a 'pop' sound. 3. Ca(OH)2+Cl2 → CaOCl2+H2O. What is the bleaching agent in this reacti ...
Electrolysis of water
Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) due to an electric current being passed through the water.This technique can be used to make hydrogen fuel (hydrogen gas) and breathable oxygen; though currently most industrial methods make hydrogen fuel from natural gas instead.