
Grade 11 Chemistry E.. - hrsbstaff.ednet.ns.ca
... g. Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + NaCl(aq) h. CH3OH(l) + O2(g) → CO2(g) + H2O(g) 25. Classify each of the above according to the 5 types of reactions (composition, decomposition, single replacement, double replacement and combustion). 26. Write the formula for each material correctly and then b ...
... g. Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + NaCl(aq) h. CH3OH(l) + O2(g) → CO2(g) + H2O(g) 25. Classify each of the above according to the 5 types of reactions (composition, decomposition, single replacement, double replacement and combustion). 26. Write the formula for each material correctly and then b ...
Exam Review - hrsbstaff.ednet.ns.ca
... a) alpha particles are the nuclei of helium atoms. b) the mass of an atom is concentrated in its nucleus. c) cathode rays are streams of negatively charged ions. d) the charge-to-mass (e/m) ratio is the same for all cathode ray particles ...
... a) alpha particles are the nuclei of helium atoms. b) the mass of an atom is concentrated in its nucleus. c) cathode rays are streams of negatively charged ions. d) the charge-to-mass (e/m) ratio is the same for all cathode ray particles ...
CHEMICAL REACTIONS
... (s) after the formula –solid Cu(s) (g) after the formula –gas H2 (g) (l) after the formula -liquid H2O(l) (aq) after the formula - dissolved in water, an aqueous solution. CaCl2 (aq) used after a product indicates a gas (same as (g)) O2 used after a product indicates a solid (same as (s)) ...
... (s) after the formula –solid Cu(s) (g) after the formula –gas H2 (g) (l) after the formula -liquid H2O(l) (aq) after the formula - dissolved in water, an aqueous solution. CaCl2 (aq) used after a product indicates a gas (same as (g)) O2 used after a product indicates a solid (same as (s)) ...
acids and bases - No Brain Too Small
... Metals lose electrons and form positive ions, non-metals gain electrons and form negative ions Atoms lose or gain electrons to achieve a full valence shell because this is a stable ...
... Metals lose electrons and form positive ions, non-metals gain electrons and form negative ions Atoms lose or gain electrons to achieve a full valence shell because this is a stable ...
Homework Assignment #4
... For the following exercises, you will need a periodic table. Check the course web site for useful links. 7. (4 pts) The amino acid methionine has the molecular formula of C5H11NO2S. a) Its molecular weight is: ...
... For the following exercises, you will need a periodic table. Check the course web site for useful links. 7. (4 pts) The amino acid methionine has the molecular formula of C5H11NO2S. a) Its molecular weight is: ...
Document
... 5. Halogens: The oxidation number of fluorine is -1. Each of the other halogens (Cl, Br, I) has an oxidation number of -1 in binary compounds, except when the other element is another halogen above it in the periodic table or the other element is oxygen. 6. Compounds and ions: The sum of the oxidat ...
... 5. Halogens: The oxidation number of fluorine is -1. Each of the other halogens (Cl, Br, I) has an oxidation number of -1 in binary compounds, except when the other element is another halogen above it in the periodic table or the other element is oxygen. 6. Compounds and ions: The sum of the oxidat ...
Ch. 8 Notes (Chemical Reactions) Teacher 2010
... = “yields” or “reacts to produce” = _____________ reaction (like a rechargeable battery) reversible ...
... = “yields” or “reacts to produce” = _____________ reaction (like a rechargeable battery) reversible ...
PowerPoint Lectures - Northwest ISD Moodle
... Generally, when solutions of an acid and a base are combined, the products are a salt (ionic compound) and water. - Water is neutral on the pH scale, unlike acids or bases, hence the name neutralization reaction - The formation of liquid water is the driving force for these reactions ...
... Generally, when solutions of an acid and a base are combined, the products are a salt (ionic compound) and water. - Water is neutral on the pH scale, unlike acids or bases, hence the name neutralization reaction - The formation of liquid water is the driving force for these reactions ...
Summer Work
... 3. The number of protons in one atom of an element determines the atom’s __________________ , and the number of electrons determines ___________________ of an element. 4. The atomic number tells you the number of ______________________ in one atom of an element. It also tells you the number of _____ ...
... 3. The number of protons in one atom of an element determines the atom’s __________________ , and the number of electrons determines ___________________ of an element. 4. The atomic number tells you the number of ______________________ in one atom of an element. It also tells you the number of _____ ...
Ch. 6: Chemical Reactions Study Guide
... In endothermic reactions energy is transferred from the surroundings into the reactants. An endothermic reaction is one in which heat is transferred from the surroundings to the reactants. In an exothermic reaction, energy is transferred from the reactants to the surroundings. A chemical reaction th ...
... In endothermic reactions energy is transferred from the surroundings into the reactants. An endothermic reaction is one in which heat is transferred from the surroundings to the reactants. In an exothermic reaction, energy is transferred from the reactants to the surroundings. A chemical reaction th ...
Quiz 1 - sample quiz
... 9. Which one of the following statements is false? a) An electron jumps from a high energy orbital to a lower energy orbital when a photon of energy is emitted by an atom. b) The energy of light is directly proportional to its wavelength. c) The atomic emission spectrum consists of a series of discr ...
... 9. Which one of the following statements is false? a) An electron jumps from a high energy orbital to a lower energy orbital when a photon of energy is emitted by an atom. b) The energy of light is directly proportional to its wavelength. c) The atomic emission spectrum consists of a series of discr ...
Chemistry MSL Practical Style Review 1. What is the nuclear
... pressure of N2 is 4 atm, and the partial pressure of O2 is 6 atm, what is the partial pressure of CO2? A B C D ...
... pressure of N2 is 4 atm, and the partial pressure of O2 is 6 atm, what is the partial pressure of CO2? A B C D ...
4. bonding - New Hartford Central Schools
... 3.Place the polyatomic ion in parentheses Crisscross the oxidation numbers and omit the charge signs. Write the numbers below the symbols as subscripts. Al2(SO4)3 The sum of the oxidation numbers of all of the atoms in a compound is always zero. 4. When each element has the same oxidation number, th ...
... 3.Place the polyatomic ion in parentheses Crisscross the oxidation numbers and omit the charge signs. Write the numbers below the symbols as subscripts. Al2(SO4)3 The sum of the oxidation numbers of all of the atoms in a compound is always zero. 4. When each element has the same oxidation number, th ...
classification of chemical reactions
... formation of a new substance when chemical bonds break or new bonds are formed Example: 2Na + Cl2 2NaCl Chemical change change in matter that produces new substances Example: rusting of iron burning of wood Physical change a change that does not produce a new substance a change in appearance or st ...
... formation of a new substance when chemical bonds break or new bonds are formed Example: 2Na + Cl2 2NaCl Chemical change change in matter that produces new substances Example: rusting of iron burning of wood Physical change a change that does not produce a new substance a change in appearance or st ...
Chapter 4
... • (Complete) Combustion reactions (Chapter 3) C3H8(g) + 5O2 (g) → 3CO2 (g) + 4H2O(g) • Combination reactions (Chapter 3) 2Mg(s) + O2(l) → 2MgO(s) • Decomposition reactions (Chapter 3) PbCO3(s) →PbO(s) + CO2(g) • Exchange reactions (Chapter 4) ...
... • (Complete) Combustion reactions (Chapter 3) C3H8(g) + 5O2 (g) → 3CO2 (g) + 4H2O(g) • Combination reactions (Chapter 3) 2Mg(s) + O2(l) → 2MgO(s) • Decomposition reactions (Chapter 3) PbCO3(s) →PbO(s) + CO2(g) • Exchange reactions (Chapter 4) ...
Chemical Reaction Basics
... Advanced Chemistry – Chapter 8 A ____________ ____________ is a process by which one or more substances are changed into one or more ____________ substances. Chemical reactions are represented by some type of ____________. The general form is as follows: ...
... Advanced Chemistry – Chapter 8 A ____________ ____________ is a process by which one or more substances are changed into one or more ____________ substances. Chemical reactions are represented by some type of ____________. The general form is as follows: ...
IB Definitions
... a substance is completely burned in oxygen. Reactants and products at 298K and 101.3 Kpa (1 atm) S(s) + O2 (g) --> SO2(g) ...
... a substance is completely burned in oxygen. Reactants and products at 298K and 101.3 Kpa (1 atm) S(s) + O2 (g) --> SO2(g) ...
CHAPTER 10 - NUCLEAR PHYSICS
... Example 9 g of H2O contains 8 g of oxygen and 1 g of hydrogen 18 g of H2O contains 16 g of oxygen and 2 g of hydrogen 36 g of H2O contains 32 g of oxygen and 4 g of hydrogen The mass ratio in water is always 8 to 1. The percent composition can be found by dividing the total mass of an element in the ...
... Example 9 g of H2O contains 8 g of oxygen and 1 g of hydrogen 18 g of H2O contains 16 g of oxygen and 2 g of hydrogen 36 g of H2O contains 32 g of oxygen and 4 g of hydrogen The mass ratio in water is always 8 to 1. The percent composition can be found by dividing the total mass of an element in the ...
Chem vocab quiz definitons
... Proton is a positively charged particles that are found in the nucleus, and has the mass of 1 atomic unit (amu). Neutron is an electrically neutral particles that are found in the nucleus, and has a mass of 1 amu. Electron is a negatively charged sub atomic particle found in an area outside the nucl ...
... Proton is a positively charged particles that are found in the nucleus, and has the mass of 1 atomic unit (amu). Neutron is an electrically neutral particles that are found in the nucleus, and has a mass of 1 amu. Electron is a negatively charged sub atomic particle found in an area outside the nucl ...
Final Exam Practice 2016 (MC)
... d) The above statement is incorrect. Both CO2 and SO2 have the same Lewis Structure. 24. Circle the correct answer regarding resonance structures/forms: 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 ...
... d) The above statement is incorrect. Both CO2 and SO2 have the same Lewis Structure. 24. Circle the correct answer regarding resonance structures/forms: 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 ...
5 - BrainMass
... pressure. c. For a given sample of CH3OH, the enthalpy change on reaction is 18.5 kJ. How many grams of hydrogen gas are produced? d. What is the value of ΔH for the reverse of the previous reaction? How many kilojoules of heat are released when 27.0 g of CO (g) reacts completely with H2 (g) to form ...
... pressure. c. For a given sample of CH3OH, the enthalpy change on reaction is 18.5 kJ. How many grams of hydrogen gas are produced? d. What is the value of ΔH for the reverse of the previous reaction? How many kilojoules of heat are released when 27.0 g of CO (g) reacts completely with H2 (g) to form ...
Introduction to Chemical Equations
... A chemical reaction is happening! Matter is being rearranged, but NO mass is lost. If you were to collect all of the products and measure their mass, it would be equal to the original mass of the wood. ...
... A chemical reaction is happening! Matter is being rearranged, but NO mass is lost. If you were to collect all of the products and measure their mass, it would be equal to the original mass of the wood. ...
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.