• Chemistry Content


Unit 2 : Atoms, Molecules, and Ions

  • Mass Spectrometry

    Posted by Jonathan Steele on 1/28/2020

    Mass Spectrometry

     

     

     

    In this video, we discuss Mass Spectrometry, and how we use it to find the atomic mass of an element (based on the abundance of its' different ions).

     

    Assignments:

    1. What is the molecular mass (molar mass) of an atom?

    2. What unit is used to represent the molar mass of an atom?

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  • Naming Chemical Compounds

    Posted by Jonathan Steele on 1/22/2020

    Naming Binary Compounds - Video

     

    Assignment:

    1. What is the Correct name for CaCl2?

     

    2. Write the formula for Chromium (VI) Oxide

     

    3. What is the correct name for CuI?

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  • Introduction to the Mole

    Posted by Jonathan Steele on 1/21/2020

    Introduction to the mole - Video

     

     

    The mole is one of the most important concepts in all of Chemistry. In this video, we talk about how to convert between:

    1. Moles to atoms

    2. Mass to moles

     

     

    Assignment:

    1. How many atoms are in .023 moles of Carbon?

     

    2. How many moles are in 3.3g of Carbon?

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  • Naming Acids

    Posted by Jonathan Steele on 1/21/2020

    Naming Acids

     

     

     

     

    Assignment:

     

     

    Name each of the following acids:

    1. HC2H3O2

    2. H2SO4

     

    Write the chemical formula for

    1. Nitrous Acid

    2. Iodous Acid

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  • Introduction to the Periodic Table

    Posted by Jonathan Steele on 1/21/2020

    Introduction to the Periodic Table

     

     

    Assignment:

    1. What family on the periodic table is the most reactive?

    2. What family on the periodic table forms diatomic molecules

    3. The Noble gases don't typically participate in chemical reactions, why?

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  • 2.6 Molecules and Ions

    Posted by Jonathan Steele on 1/21/2020

    2.6 Molecules and Ions - Video

     

     

    Assignment:

    1. What is the difference between a covalent bond and an ionic bond?

    2. Write the chemical formula for Carbon Dioxide, and draw the structural formula for carbon dioxide.

    3. Write the symbol for an atom that has an atomic number of 9 and a mass number of 19. How many electrons and how many neutrons does this atom have?

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  • History of the Atom

    Posted by Jonathan Steele on 1/21/2020

    2.3 - 2.5 History of the Atom - Video

     

     

     

    We didn't always know that atoms have protons, neutrons, or electrons. We also haven't always been aware of how they combined to form compounds. In this video, we take a look at some important experiments it took to get us here.

     

    Assignment:

    1. What were the 4 main parts to Dalton's Atomic Theory?

    2. Summarize the experiments that helped us understand the atom better.

    3. What are the 3 main types of radiation?

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Unit 1: Foundations of Chemistry

  • Unit 1 Practice Questions

    Posted by Jonathan Steele on 1/15/2020
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  • Unit 1 Collaborative

    Posted by Jonathan Steele on 1/15/2020
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  • 1.10 Classifications of Matter

    Posted by Jonathan Steele on 1/15/2020

    1.10 Classifications of Matter

     

    Matter is classified by three states. In this video, we discuss those states and their characteristics.

     

    Assignment:

    1. Give an example of a homogeneous mixture and an example of a heterogeneous mixture.

     

     

    2. Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture:

    a. water from a well.

    b. Argon gas

    c. Sucrose

    d. chicken noodle soup

    e. blood flowing in a capillary.

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  • 1.8 Temperature Conversions

    Posted by Jonathan Steele on 1/14/2020

    1.8 Temperature Conversions

     

     

     

     

     

     

    In this video we talk about the three systems of measurement for temperature, and how we can convert between them.

    Assignment: Convert the following Fahrenheit temperatures to the Celsius and Kelvin scales:

    a. -459 degrees F

    b. -40 degrees F

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  • 1.6 Significant Figures

    Posted by Jonathan Steele on 1/13/2020

    Significant Figures

     

    In this lesson we talk about how to:

    a. Identify significant figures

    b. Utilize significant figures in calculations

     

     

    Assignment:

    1. Give the number of significant figures for each of the following results:

    a. A student's extraction procedure on tea yields 0.0105 g of caffeine. b. A chemist records a mass of 0.050080 g in analysis.

     

    2. Carry out the following mathematical operations and give each result with the correct number of significant figures:

    a. 0.00105 / 6.135

    b. 21 - 13.8

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  • 1.5 Uncertainty in Measurements

    Posted by Jonathan Steele on 1/13/2020

    1.5 Uncertainty in Measurements

     

     

    Measurements can have degrees of uncertainty.

    In this video we talk about what that means, and how our measuring devices can affect how precise our data is.

    Assignment:

    1. In analyzing a sample of polluted water. a chemist measured out a 25.00 - mL water sample with a pipet. At another point in the analysis, the chemist used a graduated cylinder to measure 25 mL of a solution. What is the difference between the measurements 25.00 - mL and 25 - mL?

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  • 1.33 Accuracy and Precision

    Posted by Jonathan Steele on 1/9/2020

    1.33 Accuracy and Precision

     

     

     

    Assignment:

    1. Explain the difference between accuracy and precision.

    2. Design a set of values that:

    a) Show high accuracy, but poor precision

    b) Show low accuracy, but high precision

    c) Show low accuracy, and poor precision

     

    Accuracy - refers to how close a measurement is to a desired value, or standard.

     

    Precision - refers to how close two or more measurements are to each other, regardless of whether those measurements are accurate or not.

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  • 1.32 Unit Conversions

    Posted by Jonathan Steele on 1/8/2020

    1.32 Measurement Conversions

    In this video we are going to learn how to convert between units in the metric system, using the cross method.

    Assignment:

    1. What is a conversion factor?

    2. Convert 2.5 Liters to milliliters.

    3. If you have 6.5 grams of a substance, what would be the mass in centigrams?

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  • 1.31 Introduction to Measurements

    Posted by Jonathan Steele on 1/8/2020

    1.31 Intro to Measurements

    In this video, we take a look at a few systems of measurement.

    Assignment:

    1. What are the 3 systems of measurement discussed in the video?

    2. What system of measurement is the SI System derived from?

    3. What are the two main components to measurement?

    4. What is the unit for "Amount of substance", and what is its' abbreviation?

    Comments (-1)
  • 1.1 Introduction to Chemistry

    Posted by Jonathan Steele on 1/7/2020

    1.1 Introduction to Chemistry

     

    A basic introduction to chemistry.

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