H 2 SO 4
... Pb(NO3)2(aq) + 2NaI(aq) g PbI2(s) + 2NaNO3(aq) The above equation is considered a molecular equation because the formulas of the compounds are written as though all species existed as molecules or whole units. A molecular equation is useful because it identifies the reagents, if we wanted to bring a ...
... Pb(NO3)2(aq) + 2NaI(aq) g PbI2(s) + 2NaNO3(aq) The above equation is considered a molecular equation because the formulas of the compounds are written as though all species existed as molecules or whole units. A molecular equation is useful because it identifies the reagents, if we wanted to bring a ...
Elements, Compounds and Mixtures Elements are the simplest type
... In nuclear fission the nuclei of uranium or platinum break up into 2 smaller, lighter nuclei and release a large output of energy; ...
... In nuclear fission the nuclei of uranium or platinum break up into 2 smaller, lighter nuclei and release a large output of energy; ...
Chemical Potential.
... We give a brief introduction to this concept as we will need to refer to it later in the course. As the name suggests, it is very important for studying chemical reactions and your will encounter this concept in a first course in physical chemistry. Just as the temperature governs the flow of energy ...
... We give a brief introduction to this concept as we will need to refer to it later in the course. As the name suggests, it is very important for studying chemical reactions and your will encounter this concept in a first course in physical chemistry. Just as the temperature governs the flow of energy ...
Competition for Electrons
... q Net equation — combination of the half reactions such that the number of electrons lost equals the number of electrons gained Cu2+ + Zn0 ! Zn2+ ...
... q Net equation — combination of the half reactions such that the number of electrons lost equals the number of electrons gained Cu2+ + Zn0 ! Zn2+ ...
CHEMISTRY
... 2 or more substances combine to produce a new compound Also known as composition reaction Forms oxides with oxygen and metals ...
... 2 or more substances combine to produce a new compound Also known as composition reaction Forms oxides with oxygen and metals ...
Fall.2008.Week9.Lesson.1 - reich
... (s) means the substance is a solid (aq) means the substance is aqueous Aqueous means dissolved in water, which does not necessarily mean the compound was a liquid. Ethanol and sugar both become aqueous, but only one of them was a solid at room temperature. ...
... (s) means the substance is a solid (aq) means the substance is aqueous Aqueous means dissolved in water, which does not necessarily mean the compound was a liquid. Ethanol and sugar both become aqueous, but only one of them was a solid at room temperature. ...
IB Definitions
... An exothermic reaction is one in which there is an overall negative enthalpy change (heat is evolved) An endothermic reaction is one in which there is an overall postive enthalpy change (heat is absorbed) The standard enthalpy change of a reaction is the enthalpy change when one mole of reactants is ...
... An exothermic reaction is one in which there is an overall negative enthalpy change (heat is evolved) An endothermic reaction is one in which there is an overall postive enthalpy change (heat is absorbed) The standard enthalpy change of a reaction is the enthalpy change when one mole of reactants is ...
Final Exam Practice-2017
... a) The molecule IS / IS NOT rapidly oscillating between different forms. b) There is ONE / MORE THAN ONE form of the of the actual molecule and the bond lengths of single bonds vs doubles bonds between the atoms are DIFFERENT / AN AVERAGE . c) We draw ONE / MORE THAN ONE Lewis structure to describe ...
... a) The molecule IS / IS NOT rapidly oscillating between different forms. b) There is ONE / MORE THAN ONE form of the of the actual molecule and the bond lengths of single bonds vs doubles bonds between the atoms are DIFFERENT / AN AVERAGE . c) We draw ONE / MORE THAN ONE Lewis structure to describe ...
Topic 3&4 Atoms and the per.table
... Q4. Explain why the metal elements in group 1 are (a) called the alkali metals. (b) stored under oil. Q5. What happens to the melting point of the elements in group 7 (the halogens) as you go the group? Answers:- Q3. Lithium. Q4. (a) The elements in group 1 react with water to form an ...
... Q4. Explain why the metal elements in group 1 are (a) called the alkali metals. (b) stored under oil. Q5. What happens to the melting point of the elements in group 7 (the halogens) as you go the group? Answers:- Q3. Lithium. Q4. (a) The elements in group 1 react with water to form an ...
Chemistry Notes with Blanks
... An atom (or group of atoms) that gains or loses electrons has an electrical charge and is called an ion. An ion is a charged _________ made of atoms. The attractive force between two ions of opposite charge is known as an _________ bond. ...
... An atom (or group of atoms) that gains or loses electrons has an electrical charge and is called an ion. An ion is a charged _________ made of atoms. The attractive force between two ions of opposite charge is known as an _________ bond. ...
CHEM_1305_Practice_Exam_2
... A) Solid sodium carbonate decomposes to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to form sodium oxide and carbon dioxide. C) Sodium oxide combines with carbon dioxide to form sodium carbonate. D) Sodium oxide is decomposes to give sodium carbonate and carbon dio ...
... A) Solid sodium carbonate decomposes to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to form sodium oxide and carbon dioxide. C) Sodium oxide combines with carbon dioxide to form sodium carbonate. D) Sodium oxide is decomposes to give sodium carbonate and carbon dio ...
Electricity and Magnetism Unit
... passes easily (ex: metal) • Insulators: a material through which current electricity does not pass easily (ex: nonmetal – glass, rubber, plastic, air) ...
... passes easily (ex: metal) • Insulators: a material through which current electricity does not pass easily (ex: nonmetal – glass, rubber, plastic, air) ...
Chem vocab quiz definitons
... Liquid is the state of matter that is described as having a definite volume but an indefinite shape. Gas is the state of matter that is described as having no definite shape, or volume. Solid is the state of matter that is described as having a definite shape and volume. Viscosity is a property of l ...
... Liquid is the state of matter that is described as having a definite volume but an indefinite shape. Gas is the state of matter that is described as having no definite shape, or volume. Solid is the state of matter that is described as having a definite shape and volume. Viscosity is a property of l ...
Short Answer Question (6 points)
... Scenario #4: Electricity in the Body In Chapter 23, we saw a simple electrical model for muscle and nerve cells. Let’s consider a spherical cell (it’s a simplified model) with conducting fluids inside and out and an insulating membrane in between. The capacitance of the cell membrane is 90 pF; the ...
... Scenario #4: Electricity in the Body In Chapter 23, we saw a simple electrical model for muscle and nerve cells. Let’s consider a spherical cell (it’s a simplified model) with conducting fluids inside and out and an insulating membrane in between. The capacitance of the cell membrane is 90 pF; the ...
Properties of Metals vs. Nonmetals vs. Metalloids
... Lead (II) hydroxide __________________________ chromium (III) sulfate ___________________ ...
... Lead (II) hydroxide __________________________ chromium (III) sulfate ___________________ ...
Properties of Metals vs. Nonmetals vs. Metalloids
... Lead (II) hydroxide __________________________ chromium (III) sulfate ___________________ ...
... Lead (II) hydroxide __________________________ chromium (III) sulfate ___________________ ...
Electrochemistry
Electrochemistry is the branch of physical chemistry that studies chemical reactions which take place at the interface of an electrode, usually a solid metal or a semiconductor, and an ionic conductor, the electrolyte. These reactions involve electric charges moving between the electrodes and the electrolyte (or ionic species in a solution). Thus electrochemistry deals with the interaction between electrical energy and chemical change.When a chemical reaction is caused by an externally supplied current, as in electrolysis, or if an electric current is produced by a spontaneous chemical reaction as in a battery, it is called an electrochemical reaction. Chemical reactions where electrons are transferred directly between molecules and/or atoms are called oxidation-reduction or (redox) reactions. In general, electrochemistry describes the overall reactions when individual redox reactions are separate but connected by an external electric circuit and an intervening electrolyte.