Show the Arrangement of Particles in Solid, Liquid and Gaseous Water

Solid Liquid Gas

Density of Water / Ice

Why does ice float on water? Relate your answer to the kinetic molecular theory of matter.

Observe

WaterIsopropyl Alcohol

Oil

Add an ice cube with red food coloring to each container.Explain your observations in terms of relative densities, solubilities, and the kinetic molecular theory of matter.

Chapter 1 Terms

• Sort the terms provided into categories and name each category.

• Construct a sentence for each category showing the interrelationships between the terms in the category.

• Revise your categories for homework as you read chapter 1.

Making Peanut Brittle - Demonstration

• Place ½ c corn syrup, 1 c sugar, and 1 c peanuts in a large measuring cup

• Microwave for 4 minutes. Stir.• Heat for another 4 minutes.• Stir in 1T butter, 1 t vanilla, and 1 t

baking soda• Quickly spread on greased

aluminum foil

04/21/23 5

Explain your observations using at least 10 terms presented in chapters 1.

Electric Current & Tin (II) Chloride • Working with your lab partner, dissolve 1 plastic spoonful of

SnCl2 in 50 mL of water.

• Place the solution in a petri dish.

• Connect alligator clips to one post of a battery and to a wire attached to the side of the petri dish. Connect another set of clips to the other post of the battery and to a second wire in the petri dish.

• Record your observations. Explain the chemistry involved.

04/21/23 6

Petri dish with SnCl2 battery

Decomposition of Tin ChlorideElectrolysis –

Signs of chemical change –

Physical properties –

Atoms, Compounds and Ions –

Determining the Area of an Irregularly Shaped Piece of Cardboard

Using graphical analysis (with your graphing calculator), find the area of the irregularly shaped piece of cardboard. What is another variable that is directly proportional to area?

Percent Composition of Margarine

• Spend five minutes with your partner developing a procedure and discussing the data and calculations

Ion Naming

• Monoatomic Ions (periodic table)

• Transition Metals

Polyatomic Ions • Naming Ions when number of oxygen

atoms changes:

Perchlorate

Chlorate

Chlorite

Hypochlorite

Naming Ions When Number of Hydrogen Atoms Changes

• Phosphate

• Hydrogen phosphate

• Dihydrogen phosphate

• Carbonate

• Bicarbonate

• Sulfate

• Bisulfate

Use your knowledge of the metric system and the use of conversion factors to prove Peter’s math

correct or incorrect.

•0.5t(5mL/1t)(1 cc/1 mL) = 2.5 cc

•Volume – 2 x 3.5 x 3.625 = 25.375 in3

•Density - 1 lb / 25.375 in3 = 0.0394 lb / in3

•0.0394 lb / in3 (453.6g / 1 lb) (1 in3 / 16.387 cm3) =

1.0906 g / cm3

2.5 cc (1.0906g / cc) = 2.7265 g

While the math is correct, the sig figs ARE NOT!!

TEST TUBE WITH NAIL -OBSERVATIONS:

EXPLANATIONS?????

CuSO4 and NaCl combine:

Activity Series: Fe, Cu

Iron ions react with oxygen and water:

New Concepts:

Complex ion ~

Redox Reactions ~

Base Anhydride ~

IsotopesAntimony has two stable isotopes, Sb-121 and Sb-123 with masses of 120.9038 and 122.9043 amu respectively. Calculate the percent abundance of each.

Calculation of Weighted Average Atomic Mass Using Percent

Abundance of Isotopes of the Element

Silver has an atomic mass of 107.9 amu. If 51.84% of Ag exists as Ag-107 (106.9051 amu), what is the identity and atomic mass of the other isotope?

MoleculesDiatomic – H2, O2, N2, Cl2, Br2, I2, F2

Polyatomic molecules – S8, P4, O3

Allotropes • O, P, S, C exist in different forms

• Carbon:

• O O2 and O3 (Electricity converts O2 to O3. Ozone is a blue colored gas with a pungent odor. Its name comes from ozein which means “to smell”)

• S

What is the average mass of one atom of titanium in grams?

What is the mass percent

of C in chloroform

(CHCl3)?

Calculating Empirical FormulasIn a chemical reaction, 1.000 g of sulfur combines with 3.963 g of copper to give a pure compound. What is the empirical formula of this compound?

Calculating Molecular FormulasA compound was analyzed and found to contain 53.50% carbon, 11.19% hydrogen, and 35.51% oxygen by mass. If the molar mass of this compound is 90.12 g/mol, what is the molecular formula of the compound?

Review: Isotopes

• Uranium has an atomic mass of 238.0289. It consists of two isotopes: uranium-235 with a mass of 235.044 amu and uranium-238 with a mass of 238.051 amu. Calculate the % abundance of the U-235 isotope.

Mass Percent

• Calculate the mass percent of sulfur is barium sulfate

Mass / Moles / Particles

• Calculate the number of atoms in 12 grams of iron.

Formulas

• Determine empirical and molecular formulas for a compound that is 71.65% Cl, 24.27% C, and 4.07% H. The molar mass of the compound is 98.96 g/ mol

Coulomb's Law

• The force of attraction between ions in an ionic compounds is due to:– The magnitude of charge on the ions– The distance between the ions

Smaller ions and ions with greater charge have greater forces of attraction

Naming Hydrocarbons:Alkanes:

•1 carbon: CH4 –

•2 carbons: C2H6 –

•3 carbons: C3H8 –

•4 carbons: C4H10 –

•5 carbons: C5H12 –

Naming Hydrocarbons

Alkanes, continued:

•6 carbons: C6H14 –

•7 carbons: C7H16 –

•8 carbons: C8H18 –

•9 carbons: C9H20 –

•10 carbons: C10H22 –

Alkenes –

Alkynes –

Substituted Hydrocarbons

Halocarbon – chloroform

Carboxylic acid – acetic acid

Ester – methyl acetate

Aldehyde – formaldehyde

Ketones – acetone

Alcohols – ethyl alcohol

propyl alcohol

isopropyl alcohol

Amines - methyl amine

Naming Molecules

CO

CO2

N2O

N2O5

N2O3

Radioactivity• Alpha particles:

• Beta Particles:

• Gamma Rays:

U-235 loses 1 alpha particle. What element is formed? What is its atomic mass and number?

Co-60 loses 1 beta particle. What element is formed? What is its atomic mass and number?

Radioactive Decay Series

• U-238 undergoes a series of 14 reactions to form lead-206. The first four reactions are alpha, beta, beta, and alpha decay, in that order. Write the equations for these first four steps.

Stability of Atomic Nuclei

• Only 2 stable isotopes (H, He) have more p than n• Up to Ca, stable isotopes may have equal numbers

of p and n or one or two more n than p• Beyond Ca, stable isotopes must have a ratio of

n:p that is greater than one• Beyond Bi, (83p, 126n) there are no stable

isotopes, heavier nuclei cannot be held together• Elements with even atomic numbers have more

stable isotopes than those with odd atomic numbers

What Holds a Nucleus Together?• The mass of 1 p = 1.0073 amu and the mass of 1 n

= 1.0087 amu. Therefore an alpha particle (2p, 2n) has an expected mass of 4.0320 amu.

• The actual mass of an alpha particle = 4.0015 amu. The difference, 0.0305 amu, is called nuclear mass defect.

• Mass defect can be converted into energy units using E=mc2

• This amount of energy is released when the nucleus is formed and is called nuclear binding energy.

Peanut Brittle and Chapter 1:

Physical Properties:

State Changes:

Heat Energy:

Chemical Changes:

Mixture Types: