2018 Specimen Paper 2 - Cambridge International Examinations
... 13 Different metals were tested using the apparatus shown. V ...
... 13 Different metals were tested using the apparatus shown. V ...
Ionic Bonding - petersonORHS
... electricity. Ions can move! • These solutions are called “Electrolytes” • Ionic compounds have very high melting points • When melted “molten” they conduct electricity. Ions can move! (melted salts are conductors) • Exist as crystals in a “crystal lattice.” ...
... electricity. Ions can move! • These solutions are called “Electrolytes” • Ionic compounds have very high melting points • When melted “molten” they conduct electricity. Ions can move! (melted salts are conductors) • Exist as crystals in a “crystal lattice.” ...
AS Paper 1 Practice Paper 16 - A
... The equation for the reaction between magnesium carbonate and hydrochloric acid is given below. MgCO3 + 2HCl → MgCl2 + H2O + CO2 When 75.0 cm3 of 0.500 mol dm–3 hydrochloric acid were added to 1.25 g of impure MgCO3 some acid was left unreacted. This unreacted acid required 21.6 cm3 of a 0.500 mol d ...
... The equation for the reaction between magnesium carbonate and hydrochloric acid is given below. MgCO3 + 2HCl → MgCl2 + H2O + CO2 When 75.0 cm3 of 0.500 mol dm–3 hydrochloric acid were added to 1.25 g of impure MgCO3 some acid was left unreacted. This unreacted acid required 21.6 cm3 of a 0.500 mol d ...
S294 Are you Ready for S294 e1i1 web029856
... Metals such as sodium (Na), calcium (Ca), magnesium (Mg) and iron (Fe) may form ionic bonds with other atoms by transferring bonding electrons, and so themselves become positively charged ions. The atoms of the element to which the metal transfers electrons become negatively charged ions, and the r ...
... Metals such as sodium (Na), calcium (Ca), magnesium (Mg) and iron (Fe) may form ionic bonds with other atoms by transferring bonding electrons, and so themselves become positively charged ions. The atoms of the element to which the metal transfers electrons become negatively charged ions, and the r ...
Chemical Reactions and Equations
... Here stannous chloride is a reducing agent. It reduces ferric chloride to ferrous chloride. ...
... Here stannous chloride is a reducing agent. It reduces ferric chloride to ferrous chloride. ...
Electron Arrangement
... forces holding the molecules together. Van der Waals’ forces increase with increasing size. Polar Covalent Bonding This occurs when 2 non-metal atoms form a covalent bond but the electrons are not shared equally. They sit closer to one atom than the other. The one closest to the electrons then has a ...
... forces holding the molecules together. Van der Waals’ forces increase with increasing size. Polar Covalent Bonding This occurs when 2 non-metal atoms form a covalent bond but the electrons are not shared equally. They sit closer to one atom than the other. The one closest to the electrons then has a ...
Chapter 8
... 1.) Based on the activity series of metals and halogens, which element is more likely to replace the other element in a compound? a. K or Na b. Al or Ni c. Bi or Cr d. Cl or F e. Au or Ag f. Cl or I g. Fe or Sr h. I or F ...
... 1.) Based on the activity series of metals and halogens, which element is more likely to replace the other element in a compound? a. K or Na b. Al or Ni c. Bi or Cr d. Cl or F e. Au or Ag f. Cl or I g. Fe or Sr h. I or F ...
the original file
... study list for exam 1 1. how to draw resonance structures 2. meaning of conjugated vs isolated pi bonds 3. what an orbital is 4. be able to draw MO diagrams for allyl radical and cation and benzene, such as the one in Fig. 10.2 but you dont need to know how the MOs look, just the relative energy lev ...
... study list for exam 1 1. how to draw resonance structures 2. meaning of conjugated vs isolated pi bonds 3. what an orbital is 4. be able to draw MO diagrams for allyl radical and cation and benzene, such as the one in Fig. 10.2 but you dont need to know how the MOs look, just the relative energy lev ...
syllabus for entrance examination - NTU.edu
... and m are both integral and are either 0, 1 or 2. The use of the integrated forms of first- and second-order rate equations is not required but the use of constancy of half-life as a test for first order kinetics is included. Simple calculations on half-life may be set. Questions will not be set req ...
... and m are both integral and are either 0, 1 or 2. The use of the integrated forms of first- and second-order rate equations is not required but the use of constancy of half-life as a test for first order kinetics is included. Simple calculations on half-life may be set. Questions will not be set req ...
ChemicalBondingTestAnswers
... 7. Zero sum rule – For neutral chemical formulas containing ions, the sum of the positive and negative ions must equal to zero. ...
... 7. Zero sum rule – For neutral chemical formulas containing ions, the sum of the positive and negative ions must equal to zero. ...
1 CHAPTER 7: ELECTRICITY AND MAGNETISM 7.1
... Diverge Diverge Converge No change Converge No change ...
... Diverge Diverge Converge No change Converge No change ...
Exam Review - hrsbstaff.ednet.ns.ca
... 25. Rutherford's observation that a gold fail scatters some alpha particle through angles greater than 90º enabled him to conclude that a) all atoms are electrically neutral. b) the nucleus of the atom contains the positive charge. c) an electron has a very small mass. d) electrons are a part of al ...
... 25. Rutherford's observation that a gold fail scatters some alpha particle through angles greater than 90º enabled him to conclude that a) all atoms are electrically neutral. b) the nucleus of the atom contains the positive charge. c) an electron has a very small mass. d) electrons are a part of al ...
Final
... Perform molarity calculations and conversions Be able to develop a precipitation and acid/base neutralization reaction given the names of the starting materials Determine whether a material is soluble or insoluble Determine whether a precipitation and acid/base neutralization reaction occurs Write c ...
... Perform molarity calculations and conversions Be able to develop a precipitation and acid/base neutralization reaction given the names of the starting materials Determine whether a material is soluble or insoluble Determine whether a precipitation and acid/base neutralization reaction occurs Write c ...
Balancing ANY chemical Equation
... Predicting products of chemical reactions The solubility guidelines may be used to predict whether a precipitation reaction will occur. When solutions of soluble ionic compounds are mixed together we need to identify all the ions present in the solution and then consider if possible cation/anion pa ...
... Predicting products of chemical reactions The solubility guidelines may be used to predict whether a precipitation reaction will occur. When solutions of soluble ionic compounds are mixed together we need to identify all the ions present in the solution and then consider if possible cation/anion pa ...
Chemical Reactions
... Synthesis Reaction • Synthesis – 2 substances (reactants) combine to form a new substance (product). – Substances are either atoms (elements) or compounds in this case. A + ...
... Synthesis Reaction • Synthesis – 2 substances (reactants) combine to form a new substance (product). – Substances are either atoms (elements) or compounds in this case. A + ...
Valence electrons and Lewis Dot Structures
... Means that one or more electrons are ____________ from the metal to the nonmetal (no longer neutral) these are now ions ...
... Means that one or more electrons are ____________ from the metal to the nonmetal (no longer neutral) these are now ions ...
review CH5 chem121pikul
... Step [1] Write the equation with the correct formulas. • The subscripts in a formula can never be changed to balance an equation, because changing a subscript changes the identity of a compound. ...
... Step [1] Write the equation with the correct formulas. • The subscripts in a formula can never be changed to balance an equation, because changing a subscript changes the identity of a compound. ...
Word - chemmybear.com
... Sn° and gases like O2, F2, Cl2 the ions usually form oxidize to the “-ic” ion. Example: 2Fe°(s) + 3Cl2(g) + heat 2FeCl3(s) 2. When you identify an oxidation product, make certain you also have a reduction product. Ex: “Free halogens + dilute OH- hypohalite ions," the halide ions (such as Cl-) as a p ...
... Sn° and gases like O2, F2, Cl2 the ions usually form oxidize to the “-ic” ion. Example: 2Fe°(s) + 3Cl2(g) + heat 2FeCl3(s) 2. When you identify an oxidation product, make certain you also have a reduction product. Ex: “Free halogens + dilute OH- hypohalite ions," the halide ions (such as Cl-) as a p ...
UNIT 7 – CHEMICAL REACTIONS
... 1. A ________________________ is simply a chemical change. It is the process by which one or more substances are changed into one or more different substances. 2. The original substances are known as ____________________ while the resulting substances are called ____________________. 3. Evidence of ...
... 1. A ________________________ is simply a chemical change. It is the process by which one or more substances are changed into one or more different substances. 2. The original substances are known as ____________________ while the resulting substances are called ____________________. 3. Evidence of ...
Chapter 8
... Melting and Boiling points and hardness are determined by the crystal lattice Lattice energy is a result of the electrostatic attractions between oppositely charged ions There is an inverse relationship between lattice energy and interionic distance ...
... Melting and Boiling points and hardness are determined by the crystal lattice Lattice energy is a result of the electrostatic attractions between oppositely charged ions There is an inverse relationship between lattice energy and interionic distance ...
Chemistry of Life
... Hydrogen Bonds • A bond between a hydrogen molecule with a ________ positive charge and another atom or molecule with a partial or __________ negative charge. ...
... Hydrogen Bonds • A bond between a hydrogen molecule with a ________ positive charge and another atom or molecule with a partial or __________ negative charge. ...
Electrochemistry
Electrochemistry is the branch of physical chemistry that studies chemical reactions which take place at the interface of an electrode, usually a solid metal or a semiconductor, and an ionic conductor, the electrolyte. These reactions involve electric charges moving between the electrodes and the electrolyte (or ionic species in a solution). Thus electrochemistry deals with the interaction between electrical energy and chemical change.When a chemical reaction is caused by an externally supplied current, as in electrolysis, or if an electric current is produced by a spontaneous chemical reaction as in a battery, it is called an electrochemical reaction. Chemical reactions where electrons are transferred directly between molecules and/or atoms are called oxidation-reduction or (redox) reactions. In general, electrochemistry describes the overall reactions when individual redox reactions are separate but connected by an external electric circuit and an intervening electrolyte.