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Elements in Group 1A will form what type of ion? +1 cation What is the singlemost important characteristic used to organize atoms in the periodic table? Atomic number or proton number What is the ideal gas law formula? PV=nRT Vertical columns are known as Groups or Families What 2 things are represented in a Lewis Dot Diagram? Atom symbol Valence electrons What type of ion do atoms in Group VIA form? -2 anions What are the 2 main types of intramolecular bonds? Ionic Covalent The most electronegative atom on the periodic table Fluorine In a solution containing water, carbon dioxide and sugar, name the solvent(s) and solute(s) Solvent – water Solutes – carbon dioxide & sugar What type of relationship exists between atomic radius and bond length trends on the periodic table? Direct relationship as radius increases, bond length increases Positive ions are called Cations What type of bond is formed when electrons are share equally between nuclei? Nonpolar covalent What is the formula for Phosphoric acid? H3PO4 These types of molecules have dipoles Polar molecules The distance from the center of an atom’s nucleus to it’s valence shell is known as it’s Atomic radius This is the weakest of the intermolecular forces Dispersion Force These types of bonds are longer than double bonds Single bonds What is the formula for the ionic compound containing Ca+2 and Cl-1? CaCl2 These types of solids behave as supercooled liquids Amorphous Solids Which gas law is this the formula for - P1V1=P2V2 Boyles Law What is the formula for the polyatomic ion sulfate? SO4-2 What do atoms in period 3 all have in common? 3 energy levels The measure of an atom’s ability to attract electrons Electronegativity What is the formula for Bromine gas? Br2 What happens to the atomic radius as you move from left to right within a period on the periodic table? Decreases What do elements in Group VIIA have in common? 7 valence electrons In the writing of an ionic compound, how do we determine the number of each atom in the compound? Criss cross the ionic charges What type of intermolecular bonds form between water molecules due to their polarity? Hydrogen bonds Bonds in which static electrical attraction is holding atoms together Ionic What element has the following electron configuration: [Ne]3s23p5 Na – sodium (atomic # 11) What is the suffix on monoatomic anions? -ide What type of equation is Aluminum + chloride Aluminum chloride Synthesis In naming an ionic compound, which ion is always listed first? Cation (positive ion) What is the name of this polyatomic ion: NH4+ Ammonium In this type of bond, shared electrons spend more time near one nucleus than another Polar Covalent When an atom gains electrons what does it become? Anion (negatively charged ion) What is the relationship between bond length and bond strength? Inverse, As bond length increases, strength decreases This theory explains molecular shape as a function of electron pairs arranging themselves as far apart from one another as possible VSEPR Valence Shell Electron Pair Repulsion What law are we following when we balance a chemical equation? Law of Conservation of Mass One mole of a compound contains how many particles? 6.02x1023 particles Balance the following equation: Ca(ClO3)2 CaCl2 + O2 Ca(ClO3)2 CaCl2 + 3O2 What is the formula for: iron (III) carbonate? Fe2(CO3)3 Write the balanced equation for the following word equation: Aluminum chloride + Calcium Aluminum + Calcium chloride 2AlCl3 + 3Ca 2Al + 3CaCl2 What type of equation is Aluminum chloride + Calcium Aluminum + Calcium chloride Single Replacement What is the formula for: iron (III) carbonate? Fe2(CO3)3 What type of reaction is the one previously written? 2Al + 3Br2 2AlBr3 Synthesis reaction What is the balanced equation for the decomposition of hydrogen peroxide into water and oxygen gas? 2H2O2 2H2O + O2 What does the abbreviation STP stand for? Standard Temperature & Pressure One mole of carbon has a mass of how many grams? 12 grams 6.02x1023 is also known as Avagodro’s Number The sum of the masses of the elements composing a compound is known as its Formula Mass What is the percent composition of CO2? %C = 12/44 = 27% %O = 16(2)/44 = 73% One mole of any gas has what molar volume? 22.4 Liters The mass of each element in a compound divided by the formula mass is the Percent composition Write the balanced formula for the reaction of iron with oxygen gas to form iron (III) oxide. 4Fe + 3O2 2Fe2O3 If 4.3g of iron reacts with oxygen, as in the previous formula, what mass of Fe2O3 would be produced? 6.1 g Fe2O3 4.3g Fe 1mol Fe 56g Fe 2mol Fe2O3 160g Fe2O3 4mol Fe 1mol Fe2O3 Determine the molarity of a solution containing 10g of sodium hydroxide in .5L of water 0.5M NaOH 10g NaOH 1mol NaOH 40g NaOH = .25 mol NaOH 0.5L = 0.5M NaOH How many liters of oxygen are required for the previous reaction? 1.29 L O2 4.3g Fe 1mol Fe 56g Fe 3mol O2 22.4 L O2 4mol Fe 1mol O2 Aluminum reacts with bromine gas to produce aluminum bromide. What is the balanced equation for this reaction? 2Al + 3Br2 2AlBr3 If 15.0g Al reacts with 46.0g Br2, which is the limiting reactant? 46.0g Br2 15.0g Al 46.0g Br2 1mol Al 2mol AlBr3 267g AlBr3 27g Al 2mol Al 1mol AlBr3 1mol Br2 2mol AlBr3 267g AlBr3 160g Br2 3mol Br2 1mol AlBr3 = 148.3g = 51.2g Find the empirical formula for the compound that consists of 20.23% Al and 79.77% Cl. AlCl3 20.23g Al 1mol Al 27g Al 79.77g Cl 1mol Cl 35g Cl = .75 mol Al .75 = 2.28 mol Cl =1 =3 .75 Name the 4 factors that influence the behavior of a gas. Volume Pressure Temperature Amount If the molar mass of the compound in the previous question is 264g, what is the molecular formula? Al2Cl6 AlCl3 formula mass = 132 264/132 = 2 For the formula 2P + 3Br2 2PBr3, if 5.0g P and 35g of Br2 react, what is the limiting reactant and how what mass of PBr3 is produced? 35g Br2 produces 39.5g PBr3 5.0g P 35g Br2 1mol P 2mol PBr3 271g PBr3 31g P 2mol P 1mol PBr3 1mol Br2 2mol PBr3 271g PBr3 160g Br2 3mol Br2 1mol PBr3 = 43.7g = 39.5g If the actual yield of PBr3 from the previous problem is 30g, what is the percent yield? 75.9% 30g/39.5g In the writing of an ionic compound, how do we determine the number of each atom in the compound? Criss cross the ionic charges What is an aqueous solution? A solution in which water is the solvent What law are we following when we balance a chemical equation? Law of Conservation of Mass Balance the following equation: Ca(ClO3)2 CaCl2 + O2 Ca(ClO3)2 CaCl2 + 3O2 One of the unique properties of water is the large amount of heat needed to change it from liquid to gas. This is known as Heat of Vaporization Write the balanced equation for the following word equation: Aluminum chloride + Calcium Aluminum + Calcium chloride 2AlCl3 + 3Ca 2Al + 3CaCl2 This is a measure of the amount of heat needed to raise 1g of liquid by 1oC. Specific Heat If the pH of a solution is 2, what is the hydrogen ion concentration? 10-2 What does the abbreviation STP stand for? Standard Temperature & Pressure What is the term used for the idea that no kinetic energy is lost due to collisions within a gas? Elastic Rank the 3 states of matter by the strength of their intermolecular forces from weakest to strongest. Gas Liquid Solid Acids, by which definition, donate H+ ions to solution? Bronsted-Lowry Name at least 4 properties of gases. Have mass Fill container Exert pressure Pressure depends on temperature Compress easily Move through one another easily This is the strongest of the intermolecular formulas due to the large differences in electronegativities within the molecules. Hydrogen bonds What is the formula for Charles’ Law? V1T2 = V2T1 These types of solids have highly ordered repeating patterns. Crystalline Solids What unit is used as a measure of concentration and defined as moles per liter? Molarity This is the measure of resistance as molecules of a liquid move past one another Viscosity A neutralization reaction between a strong acid and strong base will yield what 2 products? A Salt and Water Substances that resist changes in pH are known as Buffers In pure water, the concentrations of which 2 ions are equal? H+ and OH-