Chemical Equations
... Chemical formula A representation of a substance in which the elements are represented by their symbols and subscripts represent the number of atoms of each element ...
... Chemical formula A representation of a substance in which the elements are represented by their symbols and subscripts represent the number of atoms of each element ...
Worksheet 4 - Periodic Trends A number of physical and chemical
... However, not all electrons in an atom experience the same nuclear charge. Those closest to the nucleus experience the full nuclear charge and are held most strongly. As the number of electrons between the nucleus and the valence electrons increases, the apparent nuclear charge decreases, due to the ...
... However, not all electrons in an atom experience the same nuclear charge. Those closest to the nucleus experience the full nuclear charge and are held most strongly. As the number of electrons between the nucleus and the valence electrons increases, the apparent nuclear charge decreases, due to the ...
Document
... 1. Color the carbon atoms black, the oxygen atoms red, and leave the hydrogen atoms white. 2. Use scissors to carefully cut out the atoms. o Build the reactants: 3. On a sheet of paper, place the atoms together to make the molecules of the reactants on the left side of the chemical equation for the ...
... 1. Color the carbon atoms black, the oxygen atoms red, and leave the hydrogen atoms white. 2. Use scissors to carefully cut out the atoms. o Build the reactants: 3. On a sheet of paper, place the atoms together to make the molecules of the reactants on the left side of the chemical equation for the ...
1 - New Age International
... the oxidation number of an element of the oxidised species. It is a species getting reduced. Reducing agent is a compound which decreases the oxidation number of an element of the reduced species. It is a species getting oxidised. 25. Balancing of redox equations: Two methods are adopted: (i) ion el ...
... the oxidation number of an element of the oxidised species. It is a species getting reduced. Reducing agent is a compound which decreases the oxidation number of an element of the reduced species. It is a species getting oxidised. 25. Balancing of redox equations: Two methods are adopted: (i) ion el ...
Unit 4
... reaction reactants (starting materials) are converted into products. Consider the reaction in which magnesium oxide reacts with carbon dioxide to form magnesium carbonate. We can represent the above “word description” by a “chemical equation”. Chemical equation: MgO + CO2 → MgCO3 Reactants Product W ...
... reaction reactants (starting materials) are converted into products. Consider the reaction in which magnesium oxide reacts with carbon dioxide to form magnesium carbonate. We can represent the above “word description” by a “chemical equation”. Chemical equation: MgO + CO2 → MgCO3 Reactants Product W ...
unit (4) calculations and chemical reactions
... reaction reactants (starting materials) are converted into products. Consider the reaction in which magnesium oxide reacts with carbon dioxide to form magnesium carbonate. We can represent the above “word description” by a “chemical equation”. Chemical equation: MgO + CO2 → MgCO3 Reactants Product W ...
... reaction reactants (starting materials) are converted into products. Consider the reaction in which magnesium oxide reacts with carbon dioxide to form magnesium carbonate. We can represent the above “word description” by a “chemical equation”. Chemical equation: MgO + CO2 → MgCO3 Reactants Product W ...
Writing and Classifying Balanced Equations
... a. Write the skeleton equation to show each substance as it occurs in the diagrams. Compounds are shown with their atoms touching each other and have a subscript in their chemical formula representing the number of atoms bonded together. For example is NH3 b. Balance the equation using coefficients. ...
... a. Write the skeleton equation to show each substance as it occurs in the diagrams. Compounds are shown with their atoms touching each other and have a subscript in their chemical formula representing the number of atoms bonded together. For example is NH3 b. Balance the equation using coefficients. ...
Ch. 8 Sections 8.1-8.3 Powerpoint
... •In ionic bonding the participating atoms are so different that one or more electrons are transferred to form oppositely charged ions, when then attract each other. •In covalent bonding (also called nonpolar covalent bonding) two identical atoms share electrons equally. •There are intermediate case ...
... •In ionic bonding the participating atoms are so different that one or more electrons are transferred to form oppositely charged ions, when then attract each other. •In covalent bonding (also called nonpolar covalent bonding) two identical atoms share electrons equally. •There are intermediate case ...
CHAPTER 9
... FeCl3 is the substance oxidized. Sn undergoes an oxidation number change of 2 units. Fe undergoes an oxidation number change of 6 units. ...
... FeCl3 is the substance oxidized. Sn undergoes an oxidation number change of 2 units. Fe undergoes an oxidation number change of 6 units. ...
Name - TeacherWeb
... Molecular Orbitals One model of molecular bonding pictures a molecular orbital that is a combination of individual atomic orbitals. A bonding orbital can be occupied by a pair of electrons. In a sigma (σ) bond, the molecular orbital is symmetrical around the axis connecting two atomic nuclei. In a p ...
... Molecular Orbitals One model of molecular bonding pictures a molecular orbital that is a combination of individual atomic orbitals. A bonding orbital can be occupied by a pair of electrons. In a sigma (σ) bond, the molecular orbital is symmetrical around the axis connecting two atomic nuclei. In a p ...
Complete ionic equation
... Diatomic Molecules • Remember which atoms make diatomic molecules: – H2 and N2, O2, F2 Cl2 Br2 I2 -This is only when they are by themselves! -When other atoms are by themselves they don’t have any subscripts, for example iron is just Fe ...
... Diatomic Molecules • Remember which atoms make diatomic molecules: – H2 and N2, O2, F2 Cl2 Br2 I2 -This is only when they are by themselves! -When other atoms are by themselves they don’t have any subscripts, for example iron is just Fe ...
Haley CHM2045 Final Review
... 2. If you dissolve 35.5 g of LiBr in enough water to make 2.25 L of solution, what is the molarity of the solution? 3. Write a complete ionic and net ionic equations for the following reaction. 2KOH (aq) + H2SO4 (aq) —> 2H2O + K2SO4 4. Identify the oxidizing agent and reducing agent in the following ...
... 2. If you dissolve 35.5 g of LiBr in enough water to make 2.25 L of solution, what is the molarity of the solution? 3. Write a complete ionic and net ionic equations for the following reaction. 2KOH (aq) + H2SO4 (aq) —> 2H2O + K2SO4 4. Identify the oxidizing agent and reducing agent in the following ...
groups (families) vs rows
... aspirin, dyes and disinfectants. One industrial method of preparing chlorobenzene is to react benzene, C6H6 , with chlorine, which is represented by the following equation: C6H6 (l) + Cl2 (g) → C6H5Cl (s) + HCl (g) When 36.8g of C6H6 react with an excess of Cl2, the actual yield of C6H5Cl is 38.8g W ...
... aspirin, dyes and disinfectants. One industrial method of preparing chlorobenzene is to react benzene, C6H6 , with chlorine, which is represented by the following equation: C6H6 (l) + Cl2 (g) → C6H5Cl (s) + HCl (g) When 36.8g of C6H6 react with an excess of Cl2, the actual yield of C6H5Cl is 38.8g W ...
chp0-Intro
... volatile. As a consequence, many of them exist in the atmosphere partly as gases and partly as constituents of aerosol particles. If tetradecane (C14H30, molecular weight 198) has a gas phase mixing ratio over the N. Atlantic Ocean of 250 ppt (pptv) and an aerosol concentration of 180 ng m-3, in whi ...
... volatile. As a consequence, many of them exist in the atmosphere partly as gases and partly as constituents of aerosol particles. If tetradecane (C14H30, molecular weight 198) has a gas phase mixing ratio over the N. Atlantic Ocean of 250 ppt (pptv) and an aerosol concentration of 180 ng m-3, in whi ...
Section 1 The Nature of Chemical Reactions
... molecular compound forms from the apparent exchange of atoms or ions between two compounds. • Double-displacement reactions have the following general form: AX + BY → AY + BX • Example: The double-displacement reaction that forms lead chromate is as follows. Pb(NO3)2 + K2CrO4 → PbCrO4 + 2KNO3 ...
... molecular compound forms from the apparent exchange of atoms or ions between two compounds. • Double-displacement reactions have the following general form: AX + BY → AY + BX • Example: The double-displacement reaction that forms lead chromate is as follows. Pb(NO3)2 + K2CrO4 → PbCrO4 + 2KNO3 ...
1st Semester Practice Test
... a. a pure substance that cannot be broken down into simpler, stable substances. b. a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances. c. the smallest unit of matter that maintains its chemical identity. d. any substance ...
... a. a pure substance that cannot be broken down into simpler, stable substances. b. a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances. c. the smallest unit of matter that maintains its chemical identity. d. any substance ...
File
... Identify one isomer that will react with aqueous sodium hydroxide almost exclusively by an SN2 mechanism. Draw the mechanism for this reaction using curly arrows to represent the movement of electron pairs. Include the structural formulas of the transition state and the organic product. ...
... Identify one isomer that will react with aqueous sodium hydroxide almost exclusively by an SN2 mechanism. Draw the mechanism for this reaction using curly arrows to represent the movement of electron pairs. Include the structural formulas of the transition state and the organic product. ...
PPT - kimscience.com
... neither created nor destroyed during chemical reactions All atoms of a given element are identical in their physical and chemical properties; they differ from atoms of every other element Atoms of different elements combine in simple whole-number ratios to form compounds (can form more than one co ...
... neither created nor destroyed during chemical reactions All atoms of a given element are identical in their physical and chemical properties; they differ from atoms of every other element Atoms of different elements combine in simple whole-number ratios to form compounds (can form more than one co ...
Reactions and Equations
... • A subscripted number tells you how many atoms of an element there are directly to the left of the number. – Ex: there are two atoms of hydrogen in a water molecule ...
... • A subscripted number tells you how many atoms of an element there are directly to the left of the number. – Ex: there are two atoms of hydrogen in a water molecule ...
Redox
Redox reactions include all chemical reactions in which atoms have their oxidation state changed; in general, redox reactions involve the transfer of electrons between species. The term ""redox"" comes from two concepts involved with electron transfer: reduction and oxidation. It can be explained in simple terms: Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, these are only specific examples of a more general concept of reactions involving electron transfer.Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. Like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously. The oxidation alone and the reduction alone are each called a half-reaction, because two half-reactions always occur together to form a whole reaction. When writing half-reactions, the gained or lost electrons are typically included explicitly in order that the half-reaction be balanced with respect to electric charge.Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation state — the actual transfer of electrons may never occur. The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state. In practice, the transfer of electrons will always cause a change in oxidation state, but there are many reactions that are classed as ""redox"" even though no electron transfer occurs (such as those involving covalent bonds).There are simple redox processes, such as the oxidation of carbon to yield carbon dioxide (CO2) or the reduction of carbon by hydrogen to yield methane (CH4), and more complex processes such as the oxidation of glucose (C6H12O6) in the human body through a series of complex electron transfer processes.