binary molecular compounds
... Oxidation Numbers • Oxygen has an oxidation number of -2 in almost all compounds. Exceptions: when it is in peroxides or in a compound with fluorine • The algebraic sum of the oxidation numbers is always equal to 0, as long as the compound is neutral • The algebraic sum of the oxidation numbers of a ...
... Oxidation Numbers • Oxygen has an oxidation number of -2 in almost all compounds. Exceptions: when it is in peroxides or in a compound with fluorine • The algebraic sum of the oxidation numbers is always equal to 0, as long as the compound is neutral • The algebraic sum of the oxidation numbers of a ...
CHEMICAL REACTIONS
... · In many biochemical oxidationreduction reactions, the transfer of hydrogen atoms produces energy in the cells. The oxidation of a typical biochemical molecule can involve the transfer of two hydrogen atoms to a proton acceptor such as coenzyme FAD to produce its reduced form FADH2. ...
... · In many biochemical oxidationreduction reactions, the transfer of hydrogen atoms produces energy in the cells. The oxidation of a typical biochemical molecule can involve the transfer of two hydrogen atoms to a proton acceptor such as coenzyme FAD to produce its reduced form FADH2. ...
Chapter 2 BIO 100 Chemistry
... • Covalent bond between two atoms of the same element is always nonpolar. •A covalent bond between atoms that have similar electronegativities is also nonpolar. •Because carbon and hydrogen do not differ greatly in electronegativities, the bonds of CH4 are nonpolar. ...
... • Covalent bond between two atoms of the same element is always nonpolar. •A covalent bond between atoms that have similar electronegativities is also nonpolar. •Because carbon and hydrogen do not differ greatly in electronegativities, the bonds of CH4 are nonpolar. ...
11 BALANCING CHEMICAL EQUATIONS 1. 2 K + 1
... 1. Barium chloride + Aluminum sulfate Æ 2. Calcium nitride + water Æ 3. Calcium hydroxide + Hydrogen phosphate Æ 4. Hydrogen sulfate + Sodium hydrogen carbonate Æ 5. Calcium hydroxide + Ammonium chloride Æ 6. Potassium iodide + Lead II Nitrate Æ 7. Sodium acetate + Calcium sulfide Æ Complete each wo ...
... 1. Barium chloride + Aluminum sulfate Æ 2. Calcium nitride + water Æ 3. Calcium hydroxide + Hydrogen phosphate Æ 4. Hydrogen sulfate + Sodium hydrogen carbonate Æ 5. Calcium hydroxide + Ammonium chloride Æ 6. Potassium iodide + Lead II Nitrate Æ 7. Sodium acetate + Calcium sulfide Æ Complete each wo ...
AP Chem Stoichiometry Topic#4 Questions WS Name: Date: Per
... (d) Calculate the percent nitrogen by mass in glycine. (3) The diagram is a representation of 20 atoms of a fictitious element, which we will call nevadium (Nv). The red spheres are 293Nv, and the blue spheres are 295Nv. (a) Assuming that this sample is a statistically representative sample of the e ...
... (d) Calculate the percent nitrogen by mass in glycine. (3) The diagram is a representation of 20 atoms of a fictitious element, which we will call nevadium (Nv). The red spheres are 293Nv, and the blue spheres are 295Nv. (a) Assuming that this sample is a statistically representative sample of the e ...
Chemistry II Aqueous Reactions and Solution Chemistry Chapter 4
... and net ionic equations for the reaction between magnesium and cobalt(II) sulfate * What is oxidized and what is reduced in the reaction? ...
... and net ionic equations for the reaction between magnesium and cobalt(II) sulfate * What is oxidized and what is reduced in the reaction? ...
chapter2 2012 (no naming)
... • Sodium chloride (NaCl): Sodium cations and chloride anions associate into a continuous network ...
... • Sodium chloride (NaCl): Sodium cations and chloride anions associate into a continuous network ...
Practice Test 1 (Chapters 1-7)
... Write you name and section number on both your test booklet and your Scantron Answer Sheet. Identify the choice that best completes the statement or answers the question and fill the space coresponding to your answer on your Scantron Answer Sheet. Be sure to erase mistakes ...
... Write you name and section number on both your test booklet and your Scantron Answer Sheet. Identify the choice that best completes the statement or answers the question and fill the space coresponding to your answer on your Scantron Answer Sheet. Be sure to erase mistakes ...
Chemical reactions unit
... Think: When you hear the words “Chemical Reactions”, what comes to your mind? Often times, people picture a scientist in a lab working with chemicals. ...
... Think: When you hear the words “Chemical Reactions”, what comes to your mind? Often times, people picture a scientist in a lab working with chemicals. ...
Chemical reactions unit
... Think: When you hear the words “Chemical Reactions”, what comes to your mind? Often times, people picture a scientist in a lab working with chemicals. ...
... Think: When you hear the words “Chemical Reactions”, what comes to your mind? Often times, people picture a scientist in a lab working with chemicals. ...
Types of Chemical Reactions
... Electrons are transferred from one atom to another. Note that when one substance is oxidized, another compound must be reduced, and viceversa. Oxidation = - electrons from a substance Reduction = + electrons to a substance Mg(s) + 2 HCl(aq) MgCl2(aq) + H2(g) ...
... Electrons are transferred from one atom to another. Note that when one substance is oxidized, another compound must be reduced, and viceversa. Oxidation = - electrons from a substance Reduction = + electrons to a substance Mg(s) + 2 HCl(aq) MgCl2(aq) + H2(g) ...
24 Sept 08 - Seattle Central College
... – KHSO4 … K+ + HSO4- potassium hydrogen sulfate – NH4C2H3O2 … NH4+ + C2H3O2- ammonium acetate – NaH2PO3 ... Na+ + H2PO3- sodium dihydrogen phosphite ...
... – KHSO4 … K+ + HSO4- potassium hydrogen sulfate – NH4C2H3O2 … NH4+ + C2H3O2- ammonium acetate – NaH2PO3 ... Na+ + H2PO3- sodium dihydrogen phosphite ...
TEST on Atomic Structure
... a. They are composed of anions and cations. c. They are composed of cations only. b. They are composed of anions only. d. They are formed from two or more nonmetallic elements. ____ 42) Which element, when combined with bromine, would most likely form an ionic compound? a. lithium b. carbon c. phosp ...
... a. They are composed of anions and cations. c. They are composed of cations only. b. They are composed of anions only. d. They are formed from two or more nonmetallic elements. ____ 42) Which element, when combined with bromine, would most likely form an ionic compound? a. lithium b. carbon c. phosp ...
Chemical Equations
... Replace the formulae of these substances by the ions that they form Cancel all free ions that are unchanged on both sides of the equation (the spectators) Write the net ionic equation Note – the equation must be balanced in charge as well as in the number of atoms Precipitation and neutralisation re ...
... Replace the formulae of these substances by the ions that they form Cancel all free ions that are unchanged on both sides of the equation (the spectators) Write the net ionic equation Note – the equation must be balanced in charge as well as in the number of atoms Precipitation and neutralisation re ...
chem eng-problems
... 4) Write the net ionic equation for the precipitation reaction that may occur when solutions of calcium nitrate Ca(NO3)2 and sodium acetate (CH3COONa) are mixed. Write the balanced molecular equation, Check the solubility of products and determine the spectator ions ...
... 4) Write the net ionic equation for the precipitation reaction that may occur when solutions of calcium nitrate Ca(NO3)2 and sodium acetate (CH3COONa) are mixed. Write the balanced molecular equation, Check the solubility of products and determine the spectator ions ...
UNIT 1 - MATTER AND CHEMICAL BONDING
... c) calcium carbonate calcium oxide + carbon dioxide d) propane + oxygen carbon dioxide + water e) lead(II) hydroxide lead(II) oxide + water f) ammonia + sulphuric acid ammonium sulphate g) potassium phosphate + magnesium chloride magnesium phosphate + potassium chloride 6. For each of the ...
... c) calcium carbonate calcium oxide + carbon dioxide d) propane + oxygen carbon dioxide + water e) lead(II) hydroxide lead(II) oxide + water f) ammonia + sulphuric acid ammonium sulphate g) potassium phosphate + magnesium chloride magnesium phosphate + potassium chloride 6. For each of the ...
chemical reactions
... Oxidation is defined as loss of electrons, and reduction is defined as gain of electrons. One way to remember these definitions is to use the following ...
... Oxidation is defined as loss of electrons, and reduction is defined as gain of electrons. One way to remember these definitions is to use the following ...
Differentiated Chemistry First Term Test Review
... Sulfuric acid reacts with sodium hydroxide to yield sodium sulfate and water. If 37 grams of sulfuric acid react with 30. grams of sodium hydroxide, how many grams of water are produced? (A) 53 g (B) 14 g (C) 37 g (D) 45 g (E) 106 g ...
... Sulfuric acid reacts with sodium hydroxide to yield sodium sulfate and water. If 37 grams of sulfuric acid react with 30. grams of sodium hydroxide, how many grams of water are produced? (A) 53 g (B) 14 g (C) 37 g (D) 45 g (E) 106 g ...
GC-Final-Review-2014
... 6. In the following equation, which is the limiting reactant if 2.6 moles of aluminum are reacted with 5.2 moles of HC1? Al + HCl AlCl3 + H2 (Balance rxn first!) ...
... 6. In the following equation, which is the limiting reactant if 2.6 moles of aluminum are reacted with 5.2 moles of HC1? Al + HCl AlCl3 + H2 (Balance rxn first!) ...
Chemical reactions cause chemical changes. They involve the
... To React or Not to React! Answer Key Instructions: Read the article. Answer all the questions on a separate sheet of paper. You may write on this article. Chemical reactions cause chemical changes. They involve the breaking and making of chemical bonds. All chemical reactions involve a change in sub ...
... To React or Not to React! Answer Key Instructions: Read the article. Answer all the questions on a separate sheet of paper. You may write on this article. Chemical reactions cause chemical changes. They involve the breaking and making of chemical bonds. All chemical reactions involve a change in sub ...
Chemical equations must be balanced.
... This equation is not balanced. There is one C on each side of the equation, so C is balanced. However, on the left side, H has a subscript of 4, which means there are four hydrogen atoms. On the right side, H has a subscript of 2, which means there are two hydrogen atoms. Also, there are two oxygen ...
... This equation is not balanced. There is one C on each side of the equation, so C is balanced. However, on the left side, H has a subscript of 4, which means there are four hydrogen atoms. On the right side, H has a subscript of 2, which means there are two hydrogen atoms. Also, there are two oxygen ...
Net Ionic Prep Session NMSI INSTRUCTOR
... 3% water in the jug, so water is way outnumbered and the molecules don’t dissociate completely. If carbonic acid is formed as a product Æ CO2 + H2O. 5. Strong bases: hydroxides [and oxides] of IA and IIA* metals—write these bases dissociated. WRITE ALL WEAK ACIDS AND BASES AS MOLECULES—be on the loo ...
... 3% water in the jug, so water is way outnumbered and the molecules don’t dissociate completely. If carbonic acid is formed as a product Æ CO2 + H2O. 5. Strong bases: hydroxides [and oxides] of IA and IIA* metals—write these bases dissociated. WRITE ALL WEAK ACIDS AND BASES AS MOLECULES—be on the loo ...
All you need to know about Additional Science
... • Chlorine's Ar of 35.5 is an average of the masses of the different isotopes of chlorine. This is calculated by working out the relative abundance of each isotope. For example, in any sample of Chlorine 25% will be 37 Cl and 75% 35 Cl. The relative atomic mass is therefore calculated using the ...
... • Chlorine's Ar of 35.5 is an average of the masses of the different isotopes of chlorine. This is calculated by working out the relative abundance of each isotope. For example, in any sample of Chlorine 25% will be 37 Cl and 75% 35 Cl. The relative atomic mass is therefore calculated using the ...
Chapter 04
... the aqueous species are represented as follows: Na2SO4(aq) → 2Na+(aq) + SO42–(aq) Ba(OH)2(aq) → Ba2+(aq) + 2OH–(aq) NaOH(aq) → Na+(aq) + OH–(aq) In an ionic equation compounds that exist completely or predominately as ions in solution are represented as those ions. 2Na+(aq) + SO42– (aq) + Ba2+(aq) + ...
... the aqueous species are represented as follows: Na2SO4(aq) → 2Na+(aq) + SO42–(aq) Ba(OH)2(aq) → Ba2+(aq) + 2OH–(aq) NaOH(aq) → Na+(aq) + OH–(aq) In an ionic equation compounds that exist completely or predominately as ions in solution are represented as those ions. 2Na+(aq) + SO42– (aq) + Ba2+(aq) + ...
Atomic Structure - Hudson City School District
... • Attraction between two or more atoms due to opposite charges • YouTube - ?Ionic and covalent bonding animation?? ...
... • Attraction between two or more atoms due to opposite charges • YouTube - ?Ionic and covalent bonding animation?? ...
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.