We developed these online materials to refresh your chemistry knowledge. We recommend that you begin to prepare a month before beginning your UTSA chemistry course. Each of these topics is covered in basic chemistry and this knowledge is expected prior to taking General Chemistry 1. While we have screened all videos and materials for their accuracy and usefulness, you may have to use additional resources to adequately prepare. Please don’t hesitate to contact us if you need further assistance. 

Chapter Content

Click on chapter heading to view content

Please review the videos and articles as needed and be able to answer the guided questions and samples listed with each topic. 

Khan Academy: Elements and atoms
  1. What defines an element?
  2. List the 3 parts of an atom and their location within the atom.
  3. Which of the three subatomic particles is the driving force of chemical interactions?
CheminTen: Matter
  1. Define matter…
  2. Define Extensive and Intensive properties
  3. Complete Classification of Matter flowchart.
  4. Which is not a physical means of separation? Filtration, Distillation, Evaporation, Combustion
  5. Which is a chemical property of matter? Boiling point, Texture, Reactivity, Density
  6. List the three states of matter in order of increasing energy.
IsaacsTEACH: Matter and Properties
  1. Which state of matter has neither definite shape nor definite volume?
  2. Which is a physical change of matter? Iron Rusting, Water evaporating, Increasing the pH of a solution, Leaves changing color.
Teacher’s Pet: The Scientific Method
CrashCourse: Unit Conversion & Significant Figures The video discusses the following topics with topic specific explanation videos and practice problems to enhance understanding.
  1. SI Units and their prefixes. ( Chart )
  2. Unit Conversion and the Metric System ( Chemistry with Melissa Maribel Video ). Video problem set:
    • How many milligrams are in 612 grams?
    •  How many meters are in 1738 kilometers?
    • How many nanometers are in 27.8 centimeters?
    • How many deciliters are in 3.4 milliliters?
  3. Significant Figures Rules Made Easy ( Math Meeting Video ) and Practice Problem set with ( Tyler DeWitt Sig Fig Practice )
    • 10082
    • 70,000,000
    • 70,000,000.
    • 0.0025
    • 0.00008914
  4. Significant Figures Adding and Subtracting ( Math Meeting Video )
    • 3.5 + 51.028
    • 17 – 14.262
    •  50,000 + 4,000.0
  5. Significant Figures Multiplying and Dividing ( Math Meeting Video )
    • 25 ÷ 15
    • 7.654 × 2.3
    • 10,000 × 2.543
  6. Scientific Notation ( PlanetNutshell Short )
Mr. Fox’s Science Classroom: Temperature and Density The video discusses the following topics with an additional explanation video and practice problems on density to enhance understanding.
  1. Density ( TheChemistrySolution: Density Calculations )
    • If a liquid has a mass of 352 grams and a volume of 0.546 liters, what is the density of the liquid in g/mL?
    • If you have 25 grams of gold (density = 19.3 g/cm3) and 29 grams of platinum (density = 21.45 g/cm3), which metal occupies the greatest volume?
  2. Temperature
  3. How temperature affects density
Chem Academy: The Development of Modern Atomic Theory
  1. Democritus
  2. John Dalton’s postulates and his atom model
  3. JJ Thomson, the cathode ray tube, and his Plum Pudding model of the atom
  4. Ernest Rutherford, the gold foil experiment, and the Planetary model of the atom
  5. Niels Bohr and the Bohr model of the atom with set energy levels
  6. Louis de Broglie and the wave like property of all matter
  7. Heisenberg and Schrodinger and the current/modern Wave Mechanical model of the atom
IsaacsTEACH: Chemistry 2.2 Structure of the Atom
  1. Sub atomic particles and their location
  2. Element Symbol Notation
    • Atomic #
    • Atomic mass
    • # of protons, neutrons, and electrons
Chemistry with Melissa Maribel: Calculating Atomic number, mass and structure
  1. How to calculate number of protons, neutrons, and electrons
  2. How to calculate ion charge
  3. Practice problems from video:
    • How many protons, neutrons, and electrons are in N2-?
    • How many protons, neutrons, and electrons are in F?
    • What element or ion has 20 protons, 20 neutrons, and 18 electrons?
  4. *For an extension of this topic, calculating % Abundance and average atomic mass, click on the following video: ( Melissa Maribel Supplement )
KittatinnyTSA: Brief introduction to the periodic table
  1. Discussion of the types of elements and where to find them on the periodic table
  2. Names of the different families of the periodic table and some of their properties
Professor Dave Explains: The periodic table trends
  1. Discussion of the four periodic trends and the explanation behind them
  2. Mendeleev, the father of the Periodic Table
  3. Practice problems from the video:
    • Put the following elements in order of increasing atomic radius: Si, Kr, Cl, K, Ca
    • Which is the larger atom in each pair: [Br & Br], [Cl & Ar], [K & K+]
  4. *For a deeper understanding of electron distribution with in an atom, which can be used to predict atom behavior and bonding, click on the following link: ( Bozeman Science )
Bozeman Science: The Mole
  1. What is the mole? How and why we use it
  2. Where the mole comes from
  3. Atomic mass unit (AMU)
  4. Conversion between Grams <– –> Moles <– –> Particles using dimensional analysis
  5. Using coefficients of balanced chemical equation for mole to mole ratio
  6. *For additional practice in mole conversions click on the following video: ( ketzbook )
Tyler DeWitt: Ionic vs. Molecular
  1. How to determine from a chemical formula
  2. Difference between ionic and covalent
  3. Atomic arrangement
IsaacsTEACH: Chemistry 4.2 Properties of Ionic and Covalent Compounds
  1. Physical and chemical properties of ionic and covalent compounds
Bente Brauer: Pure Substances vs. Mixtures
  1. Review of pure substance and mixtures
  2. Homogeneous vs heterogeneous mixtures
  3. Suspensions, solutions, and colloids
TED-Ed: Iddo Magen on separating the seemingly inseparable
  1. Review physical and chemical means of separation
Mr. Causey: Naming Compounds in Chemistry
  1. Nonmetallic Roots
  2. Numeric prefixes
  3. Common ions
  4. Polyatomic ions
  5. Naming compounds
    • Ionic compounds and balancing their charges
    • Metals with multiple oxidation states
    • Covalent compounds and prefixes
  6. Example problems in the video:
    • NaCl
    • Fe2O3
    • (NH4)2CO3
    • CO2
    • N2O4
  7. Practice problems at the end of the video:
    • SF6
    • LiH
    • NH4NO3
    • Cu2S
    • Na2CO3
  8. List of common ions: Printable Sheet of Ions . We encourage students to memorize this list of common ions to better prepare for nomenclature.
TheChemistrySolution: Determining Empirical and Molecular Formulas
  1. What are empirical and molecular formulas
  2. How to calculate the empirical formula from the % composition
  3. How to calculate the molecular formula from the empirical formula and the molecular weight
  4. Examples in the video:
    • What is the empirical formula of a compound with 54.52% C, 9.17% H, and 36.31% O?
    • What is the molecular formula of a compound using the previous empirical formula and a molecular weight of 88.12 amu?
    • Oxalic acid has a percent composition of 26.68% C, 2.24 % H, and 71.08% O and a molecular weight of 90.04 amu. What are the empirical and molecular formulas?
Tyler DeWitt: Major Types of Reactions
  1. Definitions and examples of the 5 major types of chemical reactions with examples
  2. Gives general equation for each type of reaction
Bozeman Science: Molecular, Ionic and Net Ionic Reactions
  1. Balancing molecular equation with particle diagram
  2. Ionic equations and net ionic equations
  3. *Additional supplemental video: Solubility Rules and How to Use a Solubility Table by Melissa Maribel
Professor Dave Explains: Oxidation-Reduction Reactions
  1. What is a REDOX reaction
  2. Assigning oxidation numbers
  3. Practice Problems at the end of the video: Assign oxidation numbers to each element in the following compounds:
    • PbO2
    • Cr2O72-
    • MnO4
    • S8
    • NH3
    • Al2(SO4)3
IsaacsTEACH: What are acids and bases Part 1 & Part 2
  1. Properties of acids and bases
  2. Common acids and bases
  3. Three Acid/Base theories
  4. Conjugate acid-base pairs
TED-Ed: Tod Ramsey on the Law of Conservation of Mass Professor Dave Explains: Balancing Chemical Equations
  1. Reactants, products, and –>
  2. Coefficients vs. subscripts
  3. Balancing tips
  4. Visual of particle rearrangement
  5. Practice problems at the end of the video:
    •  __P  +  ­­__O2 –>  __P4O10
    •  __AgF  +  __CaCl2 –>  __AgCl  +  __CaF2
    •  __Na  +  __O2 –>  __Na2O
    •  __H3PO4 +  __KOH  –>  __K3PO4  +  __H2O
    •  __Al2O3 –>  __Al  +  __O2
    •  __Fe  +  Cl2 –>  __FeCl3
TheChemistrySolution: Interconverting Masses, Moles, and Number of Particles
  1. Avogadro’s number
  2. Concept of the mole
  3. Grams <– –> Moles <– –> # of Particles using dimensional analysis
Chemistry with Melissa Maribel: How to use Mole to Mole Ratio
  1. Converting from moles of one substance to moles of another
  2. Where to get the mole to mole ratio
Crash Chemistry Academy: Stoichiometry Tutorial
  1. Particle explanation of molar ratio in chemical reaction
  2. Mole A <– –> Mole B converstions
  3. Mass of A <– –> Mass of B
  4. Particles of A <– –> Particles of B
  5. Volume of gases conversions
  6. Conversion map
TheChemistrySolution: Theoretical, Actual and Percent Yield Problems
  1. Defines each yield
  2. Demonstrates how to solve each
Professor Dave Explains: Molarity and Dilutions
  1. Molarity formula
  2. Dilution formula
  3. Practice problems from end of video:
    • What would be the molarity of a solution made from 86.5 g of Ca(OH)2 in 200.0 mL of H2O?
    • To what volume would you need to dilute the above solution to make it 1.95 M?
Khan Academy: Stiochiometry of a Reaction in Solution
  1. Step by step solution to the following problem: What mass of CaCO3 do you need to react with 25 mL of 0.750 M HCl? (*See video for chemical equation)
    • Balance equation
    • Convert volume units
    • Solve for moles of HCl
    • Convert moles of HCl to grams of CaCO3

Additional Tools and Resources

A list of useful youtube channels as well as documents you can reference

Tools Youtube Channels A great resource for chemistry simulation is PhET Interactive Simulations