2002 AP Chemistry Free-Response Questions
... Answer EITHER Question 2 below OR Question 3 printed on page 8. Only one of these two questions will be graded. If you start both questions, be sure to cross out the question you do not want graded. The Section II score weighting for the question you choose is 20 percent. 2. Answer parts (a) through ...
... Answer EITHER Question 2 below OR Question 3 printed on page 8. Only one of these two questions will be graded. If you start both questions, be sure to cross out the question you do not want graded. The Section II score weighting for the question you choose is 20 percent. 2. Answer parts (a) through ...
Experiment 1
... A m____ of sand and table salt is given. The first step is to d____ the salt by adding suitable amount of w____. The sand is dissolved in w____ to form a salt s____ while the sand is not soluble (i______) in water and stay at the bottom of the beaker. ...
... A m____ of sand and table salt is given. The first step is to d____ the salt by adding suitable amount of w____. The sand is dissolved in w____ to form a salt s____ while the sand is not soluble (i______) in water and stay at the bottom of the beaker. ...
star test review
... (c) potential energy of the reactants (d) potential energy of the products 8) Which type of bond is formed when an atom of potassium transfers an electron to a bromine atom? 4) Given the reaction at equilibrium: X + Y 2Z + heat The concentration of the product could be increased by (a) adding a ca ...
... (c) potential energy of the reactants (d) potential energy of the products 8) Which type of bond is formed when an atom of potassium transfers an electron to a bromine atom? 4) Given the reaction at equilibrium: X + Y 2Z + heat The concentration of the product could be increased by (a) adding a ca ...
Second exam 2014 with answers
... Last Name: ____________________________________________ First Name: _____________________________________________ Note: There are 10 questions in this exam (check both sides of the sheet). Fill in your answer in the blank space provided immediately following each question. 1/2 point will be subtract ...
... Last Name: ____________________________________________ First Name: _____________________________________________ Note: There are 10 questions in this exam (check both sides of the sheet). Fill in your answer in the blank space provided immediately following each question. 1/2 point will be subtract ...
PAP Chemistry - Fall Final Review
... b. calcium sulfide c. iron (III) oxide 30. Be able to convert between gramsmolesatoms. a. How many grams of Al2S3 are in 2.00 moles of Al2S3? b. How many atoms are found in 1.00 moles of Na? c. How many atoms are found in 1.00 moles of NaF? 31. What is Avogadro’s Number? 32. How many atoms are in ...
... b. calcium sulfide c. iron (III) oxide 30. Be able to convert between gramsmolesatoms. a. How many grams of Al2S3 are in 2.00 moles of Al2S3? b. How many atoms are found in 1.00 moles of Na? c. How many atoms are found in 1.00 moles of NaF? 31. What is Avogadro’s Number? 32. How many atoms are in ...
35 - TAMU Chemistry
... • very soluble in H2O due to H-bonding ability. It is a weak base in H2O. NH3(aq) + H2O NH4+(aq) + OH-(aq) (an equilibrium exists in H2O) • Reacts completely with strong acids NH3(aq) + HCl(aq) → NH4Cl(aq) • Dissolves Group IA, IIA metals Na + NH3(l) → Na+ + NH3(l) + eThe e- is “solvated” by NH3!! ...
... • very soluble in H2O due to H-bonding ability. It is a weak base in H2O. NH3(aq) + H2O NH4+(aq) + OH-(aq) (an equilibrium exists in H2O) • Reacts completely with strong acids NH3(aq) + HCl(aq) → NH4Cl(aq) • Dissolves Group IA, IIA metals Na + NH3(l) → Na+ + NH3(l) + eThe e- is “solvated” by NH3!! ...
Balancing Chemical Equations
... the numbers of oxygen on the right side. You cannot add a subscript number in a reaction to change the amount of atoms, you can only change the amount of compounds. Therefore you add another to the front of the compound. Since the compounds cannot be separated, you cannot just add a two in front of ...
... the numbers of oxygen on the right side. You cannot add a subscript number in a reaction to change the amount of atoms, you can only change the amount of compounds. Therefore you add another to the front of the compound. Since the compounds cannot be separated, you cannot just add a two in front of ...
CHAP 1 - NCERT books
... walls. Calcium hydroxide reacts slowly with the carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Calcium carbonate is formed after two to three days of white washing and gives a shiny finish to the walls. It is interesting to note that the chemical formula for marble is ...
... walls. Calcium hydroxide reacts slowly with the carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Calcium carbonate is formed after two to three days of white washing and gives a shiny finish to the walls. It is interesting to note that the chemical formula for marble is ...
Grades 9-12 Chemistry California Content Standards
... a. the rate of reaction is the decrease in concentration of reactants or the increase in concentration of products with time. b. how reaction rates depend on such factors as concentration, temperature, and pressure. c. the role a catalyst plays in increasing the reaction rate. d.* the definition and ...
... a. the rate of reaction is the decrease in concentration of reactants or the increase in concentration of products with time. b. how reaction rates depend on such factors as concentration, temperature, and pressure. c. the role a catalyst plays in increasing the reaction rate. d.* the definition and ...
Chemistry - Gorman Learning Center
... a. the rate of reaction is the decrease in concentration of reactants or the increase in concentration of products with time. b. how reaction rates depend on such factors as concentration, temperature, and pressure. c. the role a catalyst plays in increasing the reaction rate. d.* the definition and ...
... a. the rate of reaction is the decrease in concentration of reactants or the increase in concentration of products with time. b. how reaction rates depend on such factors as concentration, temperature, and pressure. c. the role a catalyst plays in increasing the reaction rate. d.* the definition and ...
Aqueous Solutions
... Most nitrate (NO3) salts are soluble. Most alkali (group 1A) salts and NH4+ are soluble. Most Cl, Br, and I salts are soluble (NOT Ag+, Pb2+, Hg22+) Most sulfate salts are soluble (NOT BaSO4, PbSO4, HgSO4, ...
... Most nitrate (NO3) salts are soluble. Most alkali (group 1A) salts and NH4+ are soluble. Most Cl, Br, and I salts are soluble (NOT Ag+, Pb2+, Hg22+) Most sulfate salts are soluble (NOT BaSO4, PbSO4, HgSO4, ...
S4 Standard Grade Revision Booklet
... Saves energy and money. Reduces the amount of carbon dioxide added to the atmosphere. ...
... Saves energy and money. Reduces the amount of carbon dioxide added to the atmosphere. ...
NYS Regents Chemistry June 21, 2002
... 1: II. PERIODIC TABLE\1. Properties of Elements\A. Metals\1. Metals - (32) 2: II. PERIODIC TABLE\2. Valence Electrons\A. Electron / Ionic Configuration\2. Ionic Configuration - (10, 30) 2: II. PERIODIC TABLE\4. Properties of Periods\C. Electronegativity\1. Electronegativity - (11, 13) 1: II. PERIODI ...
... 1: II. PERIODIC TABLE\1. Properties of Elements\A. Metals\1. Metals - (32) 2: II. PERIODIC TABLE\2. Valence Electrons\A. Electron / Ionic Configuration\2. Ionic Configuration - (10, 30) 2: II. PERIODIC TABLE\4. Properties of Periods\C. Electronegativity\1. Electronegativity - (11, 13) 1: II. PERIODI ...
KEY_Reaction Types WS
... task is deciding what type of reaction is taking place. In this chapter we study three types: ...
... task is deciding what type of reaction is taking place. In this chapter we study three types: ...
Language of chemistry
... chemistry students to get themselves familiar with the language used by chemists. This will help the student while studying the subject. You will be introduced in this unit to the language used in chemistry. Let us take a look at some of the common terms often encountered in chemistry. Atom – An ato ...
... chemistry students to get themselves familiar with the language used by chemists. This will help the student while studying the subject. You will be introduced in this unit to the language used in chemistry. Let us take a look at some of the common terms often encountered in chemistry. Atom – An ato ...
Balancing and Predicting Chemical Reactions:
... 4. Use the activity series for metals to explain why copper metal is used in plumbing where the water might contain compounds of many different metals. Cu is not an active metal, compared with the metals dissolved in water such as Ca2+ and Mg2+. It does not replace these metals in the compounds diss ...
... 4. Use the activity series for metals to explain why copper metal is used in plumbing where the water might contain compounds of many different metals. Cu is not an active metal, compared with the metals dissolved in water such as Ca2+ and Mg2+. It does not replace these metals in the compounds diss ...
Chemistry Final Exam Review 2006-2007
... a) Which direction does the reaction shift if temperature increases? b) Which direction does the reaction shift if hydrogen gas is increased? c) Which direction does the reaction shift if HCl is removed? d) Which direction does the reaction shift if the volume is decreased? e) Which direction doe th ...
... a) Which direction does the reaction shift if temperature increases? b) Which direction does the reaction shift if hydrogen gas is increased? c) Which direction does the reaction shift if HCl is removed? d) Which direction does the reaction shift if the volume is decreased? e) Which direction doe th ...
Name: 1) What is the oxidation number of sulfur in H SO ? A)
... C) The amount of Zn(s) will increase. ...
... C) The amount of Zn(s) will increase. ...
AS specification - word format File
... specification and draw these compounds, as they are encountered in the specification, using structural, displayed and skeletal formulae c appreciate the difference between hazard and risk d demonstrate an understanding of the hazards associated with organic compounds and why it is necessary to carry ...
... specification and draw these compounds, as they are encountered in the specification, using structural, displayed and skeletal formulae c appreciate the difference between hazard and risk d demonstrate an understanding of the hazards associated with organic compounds and why it is necessary to carry ...
1044771584 - Papacambridge
... (iii) At which point, A, B, C or D, does the white solid form? Explain why the white solid forms at that point. ...
... (iii) At which point, A, B, C or D, does the white solid form? Explain why the white solid forms at that point. ...
LEGGETT--AP CHEMISTRY * MINIMAL FINAL REVIEW
... D. C-F 16. Which of the descriptions below is the best representation of the energy change involved in the process of breaking bonds in a molecule? (ignore any subsequent bond formation that may occur) A. Always exothermic B. Always endothermic C. Net energy change is zero D. Exothermic or endotherm ...
... D. C-F 16. Which of the descriptions below is the best representation of the energy change involved in the process of breaking bonds in a molecule? (ignore any subsequent bond formation that may occur) A. Always exothermic B. Always endothermic C. Net energy change is zero D. Exothermic or endotherm ...
Lewis acid catalysis
In Lewis acid catalysis of organic reactions, a metal-based Lewis acid acts as an electron pair acceptor to increase the reactivity of a substrate. Common Lewis acid catalysts are based on main group metals such as aluminum, boron, silicon, and tin, as well as many early (titanium, zirconium) and late (iron, copper, zinc) d-block metals. The metal atom forms an adduct with a lone-pair bearing electronegative atom in the substrate, such as oxygen (both sp2 or sp3), nitrogen, sulfur, and halogens. The complexation has partial charge-transfer character and makes the lone-pair donor effectively more electronegative, activating the substrate toward nucleophilic attack, heterolytic bond cleavage, or cycloaddition with 1,3-dienes and 1,3-dipoles.Many classical reactions involving carbon–carbon or carbon–heteroatom bond formation can be catalyzed by Lewis acids. Examples include the Friedel-Crafts reaction, the aldol reaction, and various pericyclic processes that proceed slowly at room temperature, such as the Diels-Alder reaction and the ene reaction. In addition to accelerating the reactions, Lewis acid catalysts are able to impose regioselectivity and stereoselectivity in many cases.Early developments in Lewis acid reagents focused on easily available compounds such as TiCl4, BF3, SnCl4, and AlCl3. The relative strengths of these (and other) Lewis acids may be estimated from NMR spectroscopy by the Childs method or the Gutmann-Beckett method. Over the years, versatile catalysts bearing ligands designed for specific applications have facilitated improvement in both reactivity and selectivity of Lewis acid-catalyzed reactions. More recently, Lewis acid catalysts with chiral ligands have become an important class of tools for asymmetric catalysis.Challenges in the development of Lewis acid catalysis include inefficient catalyst turnover (caused by catalyst affinity for the product) and the frequent requirement of two-point binding for stereoselectivity, which often necessitates the use of auxiliary groups.