PRE-IB/Honors Chemistry Unit 6 Packet #2 (April 6th-April 24th) Directions:

1

FIRSTLY, COMPLETE THE REMINDER OF THE DISTRICT PACKET. SO THE

PREVIOUS LEARNING IN PLACE PACKET YOU SHOULD HAVE COMPLETED

LESSONS 9.2 AND 9.3, So now you need to complete 11.2,

13.2, 14.4, 19.1,19.2, 3.1 and the Mastery of Knowledge.

Here are some resources that may help:

Types of chemical reactions: https://www.youtube.com/watch?v=aMU1RaRulSo

Vapor Pressure: https://www.khanacademy.org/science/chemistry/states-of-matter-and-

intermolecular-forces/states-of-matter/v/vapor-pressure

Dalton’s Law: https://www.khanacademy.org/science/chemistry/gases-and-kinetic-molecular-

theory/ideal-gas-laws/v/introduction-to-partial-pressure

Acid and base Theories: https://www.khanacademy.org/science/biology/water-acids-and-bases/acids-

bases-and-ph/v/arrhenius-definition-of-acids-and-bases

https://www.khanacademy.org/science/biology/water-acids-and-bases/acids-bases-and-

ph/v/bronsted-lowry-definition-of-acids-and-bases

Hydrogen Ions and Acidity: https://www.khanacademy.org/science/biology/water-acids-and-

bases/acids-bases-and-ph/v/introduction-to-definition-of-ph

https://www.khanacademy.org/science/high-school-biology/hs-biology-foundations/hs-ph-

acids-and-bases/v/introduction-to-ph

Accuracy and Precision: https://www.youtube.com/watch?v=5APhVxCEPFs

https://www.youtube.com/watch?v=3G5IWRDfgTw

Error: https://www.youtube.com/watch?v=h--PfS3E9Ao&disable_polymer=true

Gonick, Larry, and Craig Criddle. The Cartoon Guide to Chemistry. Harper Collins, 2008.

Vapor Pressure:

Gonick, Larry, and Craig Criddle. The Cartoon Guide to Chemistry. Harper Collins, 2008.

Instructions: Complete the Anticipation guide questions “before you read” on the left.

Then read the article “How a Chinese Experiment became a U.S. Fourth of July Tradition,” And

then complete the Anticipation guide questions “after you read” on the right

Anticipation Guide “How a Chinese Experiment became a U.S. Fourth of July Tradition”

Before Reading Question After Reading

True False 1. The scientist who created fireworks were trying to create

e a drink that would help them live forever. True False

True False 2. Three of the five ingredients required for basic fireworks

are an oxidizer, a fuel to burn, and a chemical mixture to produce color.

True False

True False 3. When burned elements produce light of varying wave

lengths. True False

True False 4. Electrons an change energy levels. True False

True False 5. Today’s fireworks are physically lit. True False

Elements and the Periodic Table:

Notes:

Electronegativity is the ability of an atom in a bond to attract electrons to itself. The electronegativity of

an element can be judged from its position on the periodic table, and is inversely related to size of an

atom.

The electronegativity increases across a period of the periodic table. (The atomic radius decreases,

which means that the valence electrons are held more tightly by the nucleus.)

The electronegativity decreases down a group (The valence electrons are further away from and more

loosely held by the nucleus.)

In your textbook read pages 181-2

Using Fig. 6.2 on pg. 181: Locate the most and the least electronegative atoms on the

periodic table. What are the trends for electronegativity and explain how they compare to

size?

A resource for help: https://www.khanacademy.org/science/biology/chemistry--of-life/chemical-

bonds-and-reactions/v/electronegativity-and-chemical-bonds

Assignments:

On your DIY Periodic table that you added the Atomic Radius Trend, NOW ADD the

electronegativity trend.

6.3 Lesson Check (pg 182) Complete #18, 22, 24,

Answer Practice Problems

Gonick, Larry, and Craig Criddle. The Cartoon Guide to Chemistry. Harper Collins, 2008.

Practice Problems:

Compounds and Bonding:

Notes:

A covalent bond consists of electrons shared between atoms, but this sharing is not always equal,

because different atoms have different electronegativities.

The more electronegative atom in a covalent bond will attract the electrons more strongly and this will

result in it having a slight negative charge. The less electronegative atom will therefore be slightly

deficient in electrons and so will have a slight positive charge.

A covalent bond in which the atoms do not share their electrons equally and have slight electrical

charges is known as a polar covalent bond. (ex. HF) A covalent bond in which the atoms share their

electrons equally and do not have slight electrical charges is known as a nonpolar covalent bond. (ex.

F2)

In the Textbook read Polar Bonds and Molecules on pages 247-253.

Predict which atom in the following bonds would carry a partial negative charge:

H-N, S-S, O-P, C-F, B-O, H-Cl

Show the calculated difference in electronegativity for each example. (ref. Table 8.4 on pg 248 and pg

181)

A resource that may help: https://www.youtube.com/watch?v=OvjkMqGzgiY

Assignments:

Complete 8.4 Lesson Check # 31-38

Complete practice problems

Complete workbook pages 104-107

Polar Bears and Penguins Electronegativity and Polarity

Practice Problems: