Chem 1A Review
Properties of Water
Hydrogen Bonding
pH/pOH
Miscellaneous
100

Given that an atom has a charge of 3+ and it has 25 protons, how many electrons does it have?

22 electrons

100

Explain the following with a property of water: Water molecules pull other water molecules when in a siphon

Cohesion

100

What are the three elements needed for a hydrogen bond?

Nitrogen, Oxygen, Fluorine

100

What does pH indicate?

Acidity

100

What are two benefits of SI?

Higher grades (at least half a letter), more practice, making friends, free, etc.


200
As we move across a period (left to right on the periodic table) what is the trend of electronegativity?

It increases

200

Explain the following with a property of water: The lower meniscus when looking at water in a graduated cylinder

Adhesion

200
What are the types of bonds required to have hydrogen bonding present?

Polar covalent

200

What does pOH indicate?

Basicity

200

What is the name of the second professor teaching this course?

Dr. Peter Atkinson

300

Within ethanol (C2H5OH) there is an OH functional group. Oxygen has an EN = 3.44 and Hydrogen has an EN = 2.20. What is a good description of the O-H bond? Include its polarity and whether it is covalent, noncovalent, or ionic. 

The O-H bond is polar covalent

300

Explain the following with a property of water: Salt placed in water dissolves

Hydrophilicity/polarity

300

Do two molecules of acetone exhibit hydrogen bonding?

No

300

A pH = 7 is equal to what concentration of hydrogen ions?

10-7 M

300

When is midterm 3 for this class?

February 28, 2020

400

Rank the strength of London dispersion forces, dipole-dipole forces, and Hydrogen bonding

H bonding > dipole-dipole > LDF

400

Explain the following with a property of water: duckweed, a small floating aquatic plant, floats on the surface of water instead of sinking

High surface tension

400

Does a mixture of ethanoic acid and furan exhibit hydrogen bonding?

Yes

400

A pOH = 7 is equivalent to what concentration of hydroxide ions?

10-7 M

400

What is the deadline for any grading disputes?

April 2, 2020

500

Explain polarity with regards to bonds and in molecules. 

Bonds - different electronegativities

Molecules - collection of polar bonds 

500

Explain the following with a property of water: fish that live in a lake in an area that has temperature that has large fluctuations based on the seasons (gets really hot in the summer, really cold in the winter)

High specific heat of water

500

Does a mixture of acetate and hydrogen cyanide have hydrogen bonding?

No

500
What is the range of the pH scale?

0-14

500
In my name, Max is short for what?

Maximo

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