elements of chemistry unit
... or groups of atoms) to another. These reactions are called oxidation reduction reactions. The species that loses electrons is oxidized and the species gaining electrons is reduced. Oxidation reduction reactions are also known as redox reactions (red = reduction, ox = oxidation). ...
... or groups of atoms) to another. These reactions are called oxidation reduction reactions. The species that loses electrons is oxidized and the species gaining electrons is reduced. Oxidation reduction reactions are also known as redox reactions (red = reduction, ox = oxidation). ...
Step 2
... number to each element wherever it appears in the equation. If the reaction is a redox reaction, identify the element that undergoes an increase in oxidation number and the elements the undergoes a decrease. Find the numerical values of the increase and decrease. Determine the smallest whole-number ...
... number to each element wherever it appears in the equation. If the reaction is a redox reaction, identify the element that undergoes an increase in oxidation number and the elements the undergoes a decrease. Find the numerical values of the increase and decrease. Determine the smallest whole-number ...
chemical bonding i: basic concepts
... and negative ions are formed and attract each other through electrostatic forces called ionic bonds. 3. In other cases, one or more pairs of electrons are shared between atoms. A bond formed by the sharing of electrons between atoms is called a covalent bond. 4. Electrons are transferred or shared i ...
... and negative ions are formed and attract each other through electrostatic forces called ionic bonds. 3. In other cases, one or more pairs of electrons are shared between atoms. A bond formed by the sharing of electrons between atoms is called a covalent bond. 4. Electrons are transferred or shared i ...
James Moir as Inorganic Chemist
... atomic theory development and according to him it explained the great similarity between C, N and O. It may have given better explanations than the current ones for some of the very remarkable isomeric changes in organic chemistry; for example, the change of ammonium thiocyanate into thiourea could ...
... atomic theory development and according to him it explained the great similarity between C, N and O. It may have given better explanations than the current ones for some of the very remarkable isomeric changes in organic chemistry; for example, the change of ammonium thiocyanate into thiourea could ...
Chemistry IGCSE
... true facts related to matter and their states. The theory explains the behavior of matter and their physical properties. ...
... true facts related to matter and their states. The theory explains the behavior of matter and their physical properties. ...
CHEMISTRY – Summer Assignment Solutions 2013
... Naming – always name the ions not the formulas (cation then anion). Name tells the type of ions involved not how many of each ion cations: name the element; if more than one oxidation state is possible (d-block) follow with the charge in Roman numerals in parentheses anions: if monatomic then use ...
... Naming – always name the ions not the formulas (cation then anion). Name tells the type of ions involved not how many of each ion cations: name the element; if more than one oxidation state is possible (d-block) follow with the charge in Roman numerals in parentheses anions: if monatomic then use ...
SOL Review Part 3 Nomenclature reactions
... 1. Calculate the empirical formula. Assume 100 g of the compound, which will contain 38.70 g carbon, 9.75 g hydrogen and the rest oxygen ? g O = 100 g - 38.70 g C - 9.75 g H = 51.55 g O. 2. Calculate the moles of each element present: ...
... 1. Calculate the empirical formula. Assume 100 g of the compound, which will contain 38.70 g carbon, 9.75 g hydrogen and the rest oxygen ? g O = 100 g - 38.70 g C - 9.75 g H = 51.55 g O. 2. Calculate the moles of each element present: ...
oxidation–reduction reaction
... compound is the number of electrons lost or gained by the atom when it forms ions. • Oxidation numbers are tools that scientists use in written chemical equations to help them keep track of the movement of electrons in a redox reaction. ...
... compound is the number of electrons lost or gained by the atom when it forms ions. • Oxidation numbers are tools that scientists use in written chemical equations to help them keep track of the movement of electrons in a redox reaction. ...
Beginning Chemistry
... Every substance has certain characteristics that distinguish it from other substances and that may be used to establish that two specimens of the same substance are indeed the same. Those characteristics that serve to distinguish and identify a specimen of matter are called the properties of the sub ...
... Every substance has certain characteristics that distinguish it from other substances and that may be used to establish that two specimens of the same substance are indeed the same. Those characteristics that serve to distinguish and identify a specimen of matter are called the properties of the sub ...
chemistry
... Cold packs are used to treat minor injuries. Some cold packs contain NH4NO3(s) and a small packet of water at room temperature before activation. To activate this type of cold pack, the small packet must be broken to mix the water and NH4NO3(s). The temperature of this mixture decreases to approxima ...
... Cold packs are used to treat minor injuries. Some cold packs contain NH4NO3(s) and a small packet of water at room temperature before activation. To activate this type of cold pack, the small packet must be broken to mix the water and NH4NO3(s). The temperature of this mixture decreases to approxima ...
Chapter 20
... Oxidation – a process that involves a complete or partial loss of electrons or a gain of oxygen. • Results in an increase in the oxidation number of an atom ...
... Oxidation – a process that involves a complete or partial loss of electrons or a gain of oxygen. • Results in an increase in the oxidation number of an atom ...
Types of Reactions
... Both KI (aq) + Pb(NO3)2 (aq) are colorless solutions. When mixed, they form a bright yellow precipitate of PbI2 and a solution of KNO3. The final product of the reaction contains solid PbI2, aqueous K+2, and aqueous NO3–1 ions. Sometimes we want to highlight the reaction between ions. The molecular ...
... Both KI (aq) + Pb(NO3)2 (aq) are colorless solutions. When mixed, they form a bright yellow precipitate of PbI2 and a solution of KNO3. The final product of the reaction contains solid PbI2, aqueous K+2, and aqueous NO3–1 ions. Sometimes we want to highlight the reaction between ions. The molecular ...
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin
... Since all enzymes are made of globular proteins , and proteins are made of amino acids linked by peptide bonds , enzymes can be affected or denatured very easily . Factors that could affect or denature enzymes include heat , ration , electricity , certain chemical substances , and extreme pH. Co ...
... Since all enzymes are made of globular proteins , and proteins are made of amino acids linked by peptide bonds , enzymes can be affected or denatured very easily . Factors that could affect or denature enzymes include heat , ration , electricity , certain chemical substances , and extreme pH. Co ...
Worksheet Significant Figures
... graphs are used when the data is qualitative (descriptive, based on observations or categories of data). Line graphs are used when the data is quantitative (more precise, measured with tools). **VERY IMPORTANT** When designing an experiment, you should have only one independent and one dependent var ...
... graphs are used when the data is qualitative (descriptive, based on observations or categories of data). Line graphs are used when the data is quantitative (more precise, measured with tools). **VERY IMPORTANT** When designing an experiment, you should have only one independent and one dependent var ...
STUDY MATERIAL 2015-16 CHEMISTRY CLASS XI
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and other properties ...
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and other properties ...
Explained answers - Admissions Testing Service
... Bile is alkaline and neutralises the acid material released from the stomach into the small intestine. This will increase the pH rather than reduce it. Therefore statement 2 is incorrect. Lipase is not present in human bile. Therefore statement 3 is incorrect. The answer is B ...
... Bile is alkaline and neutralises the acid material released from the stomach into the small intestine. This will increase the pH rather than reduce it. Therefore statement 2 is incorrect. Lipase is not present in human bile. Therefore statement 3 is incorrect. The answer is B ...
CP - Fundamentals
... materials and not only came up with the law of multiple proportions, but also a relative ratio of weights of the different elements. For example, they found that by assigning hydrogen, the lightest element, an atomic mass unit of one, the following approximate relative ratios of other elements were: ...
... materials and not only came up with the law of multiple proportions, but also a relative ratio of weights of the different elements. For example, they found that by assigning hydrogen, the lightest element, an atomic mass unit of one, the following approximate relative ratios of other elements were: ...
Week 7 - Acid-base, redox
... Answers: For PH3, assign H=+1. The three bound H atoms give a total of +3. The algebraic sum of P + 3 = 0, giving P= −3. For BrO3−, assign O=-2. The three bound O atoms give a total of -6. The algebraic sum of Br + -6 = -1, giving Br=+5. For H2SO4, assign H=+1 and O=-2. The two bound hydrogen atoms ...
... Answers: For PH3, assign H=+1. The three bound H atoms give a total of +3. The algebraic sum of P + 3 = 0, giving P= −3. For BrO3−, assign O=-2. The three bound O atoms give a total of -6. The algebraic sum of Br + -6 = -1, giving Br=+5. For H2SO4, assign H=+1 and O=-2. The two bound hydrogen atoms ...
Chemistry - RESONANCE PCCP IDEAL for NTSE, IJSO, Olympiads
... The following steps are involved in determining the empirical formula of a compound : (i) The percentage composition of each element is divided by its atomic mass. It gives atomic ratio of the elements present in the compound. (ii) The atomic ratio of each element is divided by the minimum value of ...
... The following steps are involved in determining the empirical formula of a compound : (i) The percentage composition of each element is divided by its atomic mass. It gives atomic ratio of the elements present in the compound. (ii) The atomic ratio of each element is divided by the minimum value of ...
ChemistryReview
... 57. When an atom gains or loses energy, some of its ____________________ may move between energy levels. 58. The region in which an electron is most likely to be found is called a(an) ____________________. 59. When all the electrons in an atom are in orbitals with the lowest possible energy, the ato ...
... 57. When an atom gains or loses energy, some of its ____________________ may move between energy levels. 58. The region in which an electron is most likely to be found is called a(an) ____________________. 59. When all the electrons in an atom are in orbitals with the lowest possible energy, the ato ...
Chapter 2 power point File
... Chemical formulas tell the compounds needed and how many of each are required to make the compound correctly H2O tells you that to make water you need two hydrogen and one oxygen (the 2 is called a subscript) Compounds contain different ratios of elements ...
... Chemical formulas tell the compounds needed and how many of each are required to make the compound correctly H2O tells you that to make water you need two hydrogen and one oxygen (the 2 is called a subscript) Compounds contain different ratios of elements ...
First Semester Final Review
... a. Mg(OH)2(s) b. (NH4)2CO3(s) c. CuSO4(s) d. (NH4)2SO4(s) e. Sr(NO3)2(s) 45. In which of the following processes are covalent bonds broken? a. I2(s) I2(g) b. CO2(s) CO2(g) c. NaCl(s) NaCl(l) d. C(diamond) C(g) e. Fe(s) Fe(l) 46. What is the final concentration of barium ions, [Ba2+], in so ...
... a. Mg(OH)2(s) b. (NH4)2CO3(s) c. CuSO4(s) d. (NH4)2SO4(s) e. Sr(NO3)2(s) 45. In which of the following processes are covalent bonds broken? a. I2(s) I2(g) b. CO2(s) CO2(g) c. NaCl(s) NaCl(l) d. C(diamond) C(g) e. Fe(s) Fe(l) 46. What is the final concentration of barium ions, [Ba2+], in so ...
Glossary - Chemistry (Intro)
... Actinid Series: Elements that have incompletely filled 5f subshells or readily give rise to cations that have incompletely filled5f subshells. Alkali Metal: The group 1A elements like Li, Na, K, Rb, Cs, and Fr. Alkali Earth Metal: A group of grayish-white , malleable metals easily oxidized in air, c ...
... Actinid Series: Elements that have incompletely filled 5f subshells or readily give rise to cations that have incompletely filled5f subshells. Alkali Metal: The group 1A elements like Li, Na, K, Rb, Cs, and Fr. Alkali Earth Metal: A group of grayish-white , malleable metals easily oxidized in air, c ...