L1 – CHEMISTRY FINAL REVIEW
... 32. Describe the Van Der Waals forces between water molecules called dipole interactions or Hydrogen bonds. H-bond is a strong intermolecular bond between the slightly positive Hydrogen end of one water molecule and the slightly neg. oxygen end of an adjacent water molecule. 33. Name 4 unique proper ...
... 32. Describe the Van Der Waals forces between water molecules called dipole interactions or Hydrogen bonds. H-bond is a strong intermolecular bond between the slightly positive Hydrogen end of one water molecule and the slightly neg. oxygen end of an adjacent water molecule. 33. Name 4 unique proper ...
Topic 1: Quantitative chemistry (12
... Int: The discovery of the elements and the arrangement of them is a story that exemplifies how scientific progress is made across national boundaries by the sharing of information. Distinguish between the terms group and period. The numbering system for groups in the periodic table is shown in the C ...
... Int: The discovery of the elements and the arrangement of them is a story that exemplifies how scientific progress is made across national boundaries by the sharing of information. Distinguish between the terms group and period. The numbering system for groups in the periodic table is shown in the C ...
Chapter 3
... experiment. Upon this principle, the whole art of performing chemical experiments depends.” --Antoine Lavoisier, 1789 ...
... experiment. Upon this principle, the whole art of performing chemical experiments depends.” --Antoine Lavoisier, 1789 ...
chemical reactions
... Ba(NO3)2 , are combined an insoluble salt barium chromate, BaCrO4 , is formed. K2CrO4 (aq) + Ba(NO3)2 (aq) BaCrO4 (s) + 2KNO3 (aq) Precipitate These reactions will be further discussed in Chapter 8 ...
... Ba(NO3)2 , are combined an insoluble salt barium chromate, BaCrO4 , is formed. K2CrO4 (aq) + Ba(NO3)2 (aq) BaCrO4 (s) + 2KNO3 (aq) Precipitate These reactions will be further discussed in Chapter 8 ...
8th Grade Science: 1st Six Weeks At-A
... Have students complete graphic organizers to summarize their research on types of combustion. Have students work in groups to create a product explaining how to classify a chemical reaction. They should include the differences and similarities between the types of reactions. Have students conduct an ...
... Have students complete graphic organizers to summarize their research on types of combustion. Have students work in groups to create a product explaining how to classify a chemical reaction. They should include the differences and similarities between the types of reactions. Have students conduct an ...
Section 1 Forming New Substances Chapter 9
... direction of the reaction. Reactions at equilibrium will have arrows facing both directions. Apply the Law of Conservation of Mass to get the same number of atoms of every element on each side of the equation. Tip: Start by balancing an element that appears in only one reactant and product. Once one ...
... direction of the reaction. Reactions at equilibrium will have arrows facing both directions. Apply the Law of Conservation of Mass to get the same number of atoms of every element on each side of the equation. Tip: Start by balancing an element that appears in only one reactant and product. Once one ...
Matter Change
... The process by which the atoms of one or more substances are rearranged to form different substances Occurrence can be indicated by changes in temperature, color, odor, & physical state Also known as a chemical change Chemical properties can only be observed when a substance undergoes a chemical cha ...
... The process by which the atoms of one or more substances are rearranged to form different substances Occurrence can be indicated by changes in temperature, color, odor, & physical state Also known as a chemical change Chemical properties can only be observed when a substance undergoes a chemical cha ...
Lecture 4
... The oxidation number of an atom in a substance is the actual charge of the atom if it is a monatomic ion. 1. For an atom in its elemental form, the oxidation number is always zero. 2. For any monatomic ion, the oxidation number equals the charge on the ion. 3. Nonmetals usually have negative oxidati ...
... The oxidation number of an atom in a substance is the actual charge of the atom if it is a monatomic ion. 1. For an atom in its elemental form, the oxidation number is always zero. 2. For any monatomic ion, the oxidation number equals the charge on the ion. 3. Nonmetals usually have negative oxidati ...
Exam 1 Review
... (hint – use the balanced chemical equation to solve) Find heat needed to change water at 20 °C to steam at 100 °C. Does entropy increase or decrease for a given reaction? When is a reaction spontaneous? Is positive or negative entropy more favorable? What do exothermic and endothermic mean? What doe ...
... (hint – use the balanced chemical equation to solve) Find heat needed to change water at 20 °C to steam at 100 °C. Does entropy increase or decrease for a given reaction? When is a reaction spontaneous? Is positive or negative entropy more favorable? What do exothermic and endothermic mean? What doe ...
makeup2
... 5. If the hydrocarbon C2H4 is burned in oxygen gas, carbon dioxide and water are formed as described by the unbalanced chemical equation C2H4 + O2 ----> CO2 + H2O When this equation is balanced properly, we predict that one mole of C2H4 will (A) react with one mole of O2 (B) form two moles of CO2. ( ...
... 5. If the hydrocarbon C2H4 is burned in oxygen gas, carbon dioxide and water are formed as described by the unbalanced chemical equation C2H4 + O2 ----> CO2 + H2O When this equation is balanced properly, we predict that one mole of C2H4 will (A) react with one mole of O2 (B) form two moles of CO2. ( ...
File
... Oxidation numbers are written with the +/- sign in front of the number. (i.e. +2, -1) whereas valence numbers (the actual charge on an atom/molecule/ion) are written with the +/- sign behind the number (i.e 2+, 1-). Oxidation numbers and valence numbers are not necessarily the same!!! Oxidation numb ...
... Oxidation numbers are written with the +/- sign in front of the number. (i.e. +2, -1) whereas valence numbers (the actual charge on an atom/molecule/ion) are written with the +/- sign behind the number (i.e 2+, 1-). Oxidation numbers and valence numbers are not necessarily the same!!! Oxidation numb ...
ionization energies
... • Why is there such wide variation in the reactivity and physical properties of elements? • Why is there periodic repetition (periodicity) of the chemical/physical properties of elements as we move across the periodic table? ...
... • Why is there such wide variation in the reactivity and physical properties of elements? • Why is there periodic repetition (periodicity) of the chemical/physical properties of elements as we move across the periodic table? ...
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.Reactions may proceed in the forward or reverse direction until they go to completion or reach equilibrium. Reactions that proceed in the forward direction to approach equilibrium are often described as spontaneous, requiring no input of free energy to go forward. Non-spontaneous reactions require input of free energy to go forward (examples include charging a battery by applying an external electrical power source, or photosynthesis driven by absorption of electromagnetic radiation in the form of sunlight).Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperatures and concentrations present within a cell.The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.