Unit 2 Review - Chemistry 203
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Questions and Answers

Which of the following is a strong acid?

  • Ba(OH)2
  • LiOH
  • KOH
  • HCl (correct)

    • What is the formula for hydrobromic acid?

  • HBr (correct)
  • BrO
  • H2Br
  • BrH

    • Which compound acts as a strong base?

  • Ca(OH)2 (correct)
  • HNO3
  • HI
  • H2SO4

    • What is the name of the ion with the formula NO3-?

    <p>nitrate</p> Signup and view all the answers

    What is the formula for potassium hydroxide?

    <p>KOH</p> Signup and view all the answers

    How is percent yield calculated?

    <p>Percent Yield = (Actual yield / Theoretical yield) x 100%</p> Signup and view all the answers

    Which substance is classified as a strong acid?

    <p>HClO4</p> Signup and view all the answers

    What is a characteristic of a saturated solution?

    <p>No more solute can dissolve at a given temperature</p> Signup and view all the answers

    Which of the following indicates a neutralization reaction?

    <p>Combining an acid and a strong base</p> Signup and view all the answers

    How can molarity be expressed?

    <p>Molarity = moles of solute / liters of solution</p> Signup and view all the answers

    What does the equation M1V1 = M2V2 represent?

    <p>The dilution of solutions</p> Signup and view all the answers

    Which of the following is an example of a weak electrolyte?

    <p>NH3</p> Signup and view all the answers

    What is the unit of measurement for mass/volume percent?

    <p>grams per milliliter</p> Signup and view all the answers

    What is the main purpose of Avogadro's number?

    <p>To convert between moles and number of particles</p> Signup and view all the answers

    What is the empirical formula derived from a percentage composition of a compound?

    <p>The simplest integer ratio of atoms in a compound</p> Signup and view all the answers

    In a balanced chemical equation, which principle is being followed?

    <p>The number of atoms of each element must be equal on both sides</p> Signup and view all the answers

    Which type of reaction is represented by the equation A + B → AB?

    <p>Combination</p> Signup and view all the answers

    What does the limiting reagent in a chemical reaction indicate?

    <p>The reactant that completely gets used up</p> Signup and view all the answers

    What is theoretical yield in a chemical reaction?

    <p>The maximum amount of product that could be generated under ideal conditions</p> Signup and view all the answers

    How do you convert grams of a substance to moles?

    <p>Divide the grams by its molar mass</p> Signup and view all the answers

    What does percent yield measure in a chemical reaction?

    <p>The efficiency of the reaction in producing a product</p> Signup and view all the answers

    Which of the following reaction types involves the switching of positive ions between compounds?

    <p>Double Replacement</p> Signup and view all the answers

    Which calculation would you perform to determine mass percent composition from molar mass?

    <p>Divide the mass of each element by the molar mass and multiply by 100</p> Signup and view all the answers

    Study Notes

    Unit 2 Review - Chemistry 203

    • Grams, Moles, and Particles:
      • Avogadro's number: 6.022 x 1023 particles/mol
      • Convert moles to particles, atoms, ions, or molecules
      • Convert particles, atoms, ions, or molecules to moles
      • Calculate molar mass
      • Convert grams to moles
      • Convert moles to grams

    Chemical Reactions

    • Balancing Chemical Reactions:
      • Determine if a reaction is balanced or unbalanced
      • Assign coefficients to balance chemical equations
      • Reaction Types:
        • Combination (A + B → AB)
        • Decomposition (AB → A + B)
        • Single Replacement (A + BC → AC + B)
        • Double Replacement (AB + CD → AD + CB)
        • Combustion (CxHy + ZO2 → XCO2 + H2O)

    Chemical Reaction Stoichiometry

    • Stoichiometry Calculations:
      • Convert between moles of one reactant to another
      • Convert between moles of one reactant to a product
      • Convert between mass of one reactant to another
      • Convert between mass of one reactant to a product
    • Limiting Reagent:
      • The reactant completely used up
      • Identify the limiting reagent
      • Convert mass of each reactant to moles or mass of a single product
      • Lesser value is the limiting reagent
    • Theoretical Yield:
      • Maximum amount of product that can be formed
      • Assuming pure reactants and complete reaction
    • Percent Yield:
      • Percentage of theoretical yield formed
      • Actual yield divided by theoretical yield times 100%

    Solutions

    • Precipitation Reactions
    • Electrolytes: Strong, weak, nonelectrolytes

    Acid-Base Neutralization Reactions

    • Nomenclature:
      • Strong acids: HCl, HBr, HI, HClO4, HNO3, H2SO4
      • Strong bases: LiOH, NaOH, KOH, Ca(OH)2, Sr(OH)2, Ba(OH)2
    • Write products of neutralization reaction between any strong acid and any strong base
    • Understand concepts of concentration

    Concentrations

    • Molarity:
      • Calculating molarity
      • Using molarity as a conversion factor
    • Mass/volume percent:
      • Calculating mass/volume percent
    • Dilution: M1V1 = M2V2
    • Titration: determining how much of an acid/base needed to neutralize an acid/base

    Additional Information to Memorize

    • Periodic Table (provided on the exam)
    • Solubility rules
    • Avogadro's Number
    • Common Transition Metal Charges
    • Common Conversions (such as g to mL, mg to g, etc)
    • Formulas for percent yield, molarity, percent concentration, dilutions
    • Strong Acids: HCl, HBr, HI, HNO3, H2SO4, HClO4
    • Strong Bases: NaOH, KOH, Ca(OH)2,
    • Polyatomic Ions: (Provided on the exam)
    • Roman Numerals and Prefixes (to denote number of atoms in a molecule)
    • VSEPR Theory (provided on the exam)

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    Related Documents

    CHM 203 Unit 2 Study Guide PDF

    Description

    Test your knowledge on the essential concepts of Chemistry 203, including grams, moles, and particles. This quiz covers balancing chemical reactions and the principles of stoichiometry calculations, providing a comprehensive overview of the unit's key topics.

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