![Unit 1 – Physical Science and Chemical Reactions](http://s1.studyres.com/store/data/001772134_1-2f75cdd81e4e7c237e4687b8aa451230-300x300.png)
Document
... Ex 2: Turn this into a sentence BaCl2 (aq) + Na2SO4 (aq) BaSO4 (s) + 2NaCl (aq) An aqueous solution containing 1 mole of Barium Chloride reacts with 1 mole of aqueous sodium sulfate to yield 1 mole of solid barium sulfate and 2 moles of aqueous sodium chloride. ...
... Ex 2: Turn this into a sentence BaCl2 (aq) + Na2SO4 (aq) BaSO4 (s) + 2NaCl (aq) An aqueous solution containing 1 mole of Barium Chloride reacts with 1 mole of aqueous sodium sulfate to yield 1 mole of solid barium sulfate and 2 moles of aqueous sodium chloride. ...
Matter is anything that occupies space and has mass. Examples
... o NH4Cl = Ammonia Chloride o Na2SO4 = sodium sulfate When to use Roman numerals • Roman Numerals are used with metal ions that can form more than one ion. • Group I and II metals never use Roman Numerals • Most other metals do use Roman Numerals except for Aluminum, Zinc, and Silver Examples: Chromi ...
... o NH4Cl = Ammonia Chloride o Na2SO4 = sodium sulfate When to use Roman numerals • Roman Numerals are used with metal ions that can form more than one ion. • Group I and II metals never use Roman Numerals • Most other metals do use Roman Numerals except for Aluminum, Zinc, and Silver Examples: Chromi ...
C4C5C6
... • Only a few H+ ions are released at once so the equilibrium is off to the left. • Once these H+ ions have been used up a few more are released. • Strong acids are better electrical conductors because they have a higher concentration of hydrogen ions to carry the charge. ...
... • Only a few H+ ions are released at once so the equilibrium is off to the left. • Once these H+ ions have been used up a few more are released. • Strong acids are better electrical conductors because they have a higher concentration of hydrogen ions to carry the charge. ...
*6th Grade Science-Chapter 5 Study Guide Lesson 5.1: Observing
... *Changes in matter can be described in terms of physical changes and chemical changes. *Chemical reactions involve changes in properties and changes in energy that you can often observe. Physical change-any change that alters the form or appearance of a substance but does not change it into another ...
... *Changes in matter can be described in terms of physical changes and chemical changes. *Chemical reactions involve changes in properties and changes in energy that you can often observe. Physical change-any change that alters the form or appearance of a substance but does not change it into another ...
Chemistry 110 Oxidation Reduction Reactions Oxidation Number
... We can see that the oxidation number of C increases from -4 to +4 in this reaction, so C is oxidized. We can also see that the oxidation number of O decreases from zero (0) to -2, so O is reduced. Notice that the oxidation number of hydrogen does not change. It is always the case that if any element ...
... We can see that the oxidation number of C increases from -4 to +4 in this reaction, so C is oxidized. We can also see that the oxidation number of O decreases from zero (0) to -2, so O is reduced. Notice that the oxidation number of hydrogen does not change. It is always the case that if any element ...
Microsoft Word
... Strong bases — include Ba(OH)2 and hydroxides of the alkali metals (NaOH, KOH, etc.), the soluble ionic hydroxides. Other hydroxides are either slightly soluble or insoluble and are weak bases because the OH– ions are mostly tied in the solid. Acid-Base Reactions Reactions of acids ...
... Strong bases — include Ba(OH)2 and hydroxides of the alkali metals (NaOH, KOH, etc.), the soluble ionic hydroxides. Other hydroxides are either slightly soluble or insoluble and are weak bases because the OH– ions are mostly tied in the solid. Acid-Base Reactions Reactions of acids ...
CHAPTER 1 Practice Exercises 1.1 x = 12.3 g Cd 1.3 2.24845 ×12 u
... There is no space in the periodic table for another element of mass 73 u. Germanium has an atomic mass of 72.6 u and an atomic number of 32. Next to it on the periodic table is arsenic which has an atomic number of 33. In order for there to be a new element with an atomic mass of 73, it would be exp ...
... There is no space in the periodic table for another element of mass 73 u. Germanium has an atomic mass of 72.6 u and an atomic number of 32. Next to it on the periodic table is arsenic which has an atomic number of 33. In order for there to be a new element with an atomic mass of 73, it would be exp ...
Endothermic reactions
... substances to lose or gain electrons. Chemists use the term oxidation to describe the loss of electrons and the term reduction to describe the gain of electrons. Chemical reactions involving electron transfer of this sort often involve oxygen, which is very reactive, pulling electrons from metallic ...
... substances to lose or gain electrons. Chemists use the term oxidation to describe the loss of electrons and the term reduction to describe the gain of electrons. Chemical reactions involving electron transfer of this sort often involve oxygen, which is very reactive, pulling electrons from metallic ...
S4 Standard Grade Revision Booklet
... When acids are electrolysed, hydrogen gas is produced at the negative electrode. When acids or alkalis are diluted their pH moves towards 7. The test for hydrogen gas is - a lighted splint goes “pop”. Examples of non-metal oxides are:- carbon dioxide (CO2), sulphur dioxide (SO2) and nitrogen dioxide ...
... When acids are electrolysed, hydrogen gas is produced at the negative electrode. When acids or alkalis are diluted their pH moves towards 7. The test for hydrogen gas is - a lighted splint goes “pop”. Examples of non-metal oxides are:- carbon dioxide (CO2), sulphur dioxide (SO2) and nitrogen dioxide ...
Exam practice answers 5
... (d) There are two equally viable ways of doing this: using a Hess’s triangle or a Born-Haber type cycle. Hess’s triangle method: ...
... (d) There are two equally viable ways of doing this: using a Hess’s triangle or a Born-Haber type cycle. Hess’s triangle method: ...
ch14
... Compounds of 3A elements have more covalent character than similar 2A compounds. Aluminum has the physical properties of a metal, but its halides exist as covalent dimers. ...
... Compounds of 3A elements have more covalent character than similar 2A compounds. Aluminum has the physical properties of a metal, but its halides exist as covalent dimers. ...
ch8 - Otterville R-VI School District
... organize reactants and products Be sure to include symbols showing states of each reactant and product Be sure to write the correct formula ...
... organize reactants and products Be sure to include symbols showing states of each reactant and product Be sure to write the correct formula ...
Midterm Review
... What is the density of a liquid that has a mass of 50. g and a volume of 300. mL? ...
... What is the density of a liquid that has a mass of 50. g and a volume of 300. mL? ...
Document
... the walls of the container. Why would the pressure inside a cylinder increase if the temperature was increased? ...
... the walls of the container. Why would the pressure inside a cylinder increase if the temperature was increased? ...
cell molecules
... Matter consists of chemical elements in pure form and in combinations called compounds • Organisms are composed of matter. • Matter is anything that takes up space and has mass. • An element is a substance that cannot be broken down to other substances by chemical reactions. • There are 92 naturall ...
... Matter consists of chemical elements in pure form and in combinations called compounds • Organisms are composed of matter. • Matter is anything that takes up space and has mass. • An element is a substance that cannot be broken down to other substances by chemical reactions. • There are 92 naturall ...
CHEMISTRY EXAM 2 REVIEW
... My child completed this review and studied for at least 30 minutes. Define the following chemistry terms: [Chemistry Dictionary] 1. alloy a mixture of metals 2. brittleness the property of matter that is how easily the substance breaks or shatters when force is applied to it. 3. compound a substance ...
... My child completed this review and studied for at least 30 minutes. Define the following chemistry terms: [Chemistry Dictionary] 1. alloy a mixture of metals 2. brittleness the property of matter that is how easily the substance breaks or shatters when force is applied to it. 3. compound a substance ...
Document
... a) doesn’t dissolve in water & forms solid (a “precipitate”), or b) is gas that bubbles out, or c) is molecular compound (usually water) ...
... a) doesn’t dissolve in water & forms solid (a “precipitate”), or b) is gas that bubbles out, or c) is molecular compound (usually water) ...
No Slide Title - McMaster Chemistry
... RELATIVE STRENGTHS of ACIDS and BASES STRONG ACIDS - react completely with water to form H3O+ (aq) HCl (aq) + H2O H3O+ (aq) + Cl- (aq) STRONG BASES - react completely with water to form OH- (aq) Li2O + H2O 2 Li+ (aq) + OH- (aq) Weak ACIDS/ weak BASES only react partially with water - an EQUILIB ...
... RELATIVE STRENGTHS of ACIDS and BASES STRONG ACIDS - react completely with water to form H3O+ (aq) HCl (aq) + H2O H3O+ (aq) + Cl- (aq) STRONG BASES - react completely with water to form OH- (aq) Li2O + H2O 2 Li+ (aq) + OH- (aq) Weak ACIDS/ weak BASES only react partially with water - an EQUILIB ...
Test - Regents
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
objectives chm 1025 - Miami Dade College
... b. Showing how the solubility rules and electromotive series are used to predict whether or not a chemical reaction will occur. c. Interpreting the solubility rules as a means to determining the physical state of substances involved in aqueous chemical reactions and as a means to determining the typ ...
... b. Showing how the solubility rules and electromotive series are used to predict whether or not a chemical reaction will occur. c. Interpreting the solubility rules as a means to determining the physical state of substances involved in aqueous chemical reactions and as a means to determining the typ ...
Study Guide (Semester 2)
... Directions: Write a complete balanced equation for each chemical reaction. Box your answer. 1. Tin foil will oxidize when exposed to oxygen forming tin (II) oxide. ...
... Directions: Write a complete balanced equation for each chemical reaction. Box your answer. 1. Tin foil will oxidize when exposed to oxygen forming tin (II) oxide. ...
ap chemistry – 2013-2014
... 8. Be able to use and understand the Periodic Table, predict general patterns from the table, and the electronic structure of atoms. 9. Build an understanding of ionic, covalent, network covalent, and intermolecular forces of attraction. 10. Learn the physical behavior of solutions, solids, and liqu ...
... 8. Be able to use and understand the Periodic Table, predict general patterns from the table, and the electronic structure of atoms. 9. Build an understanding of ionic, covalent, network covalent, and intermolecular forces of attraction. 10. Learn the physical behavior of solutions, solids, and liqu ...
Exam 3 Review Sheet
... You should feel comfortable with the following topics: Ch. 16 and 17: Aromatic Compounds • Concepts of aromaticity: MO diagrams, Hückel Rules for Aromaticity, resonance structures • Reactions at the benzylic position: o Addition of Br or Cl with NBS/NCS in the presence of peroxide. o Oxidation of a ...
... You should feel comfortable with the following topics: Ch. 16 and 17: Aromatic Compounds • Concepts of aromaticity: MO diagrams, Hückel Rules for Aromaticity, resonance structures • Reactions at the benzylic position: o Addition of Br or Cl with NBS/NCS in the presence of peroxide. o Oxidation of a ...
Redox
![](https://commons.wikimedia.org/wiki/Special:FilePath/NaF.gif?width=300)
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.