Use these following reference matrials to help you with the practice questions. You will be able to use these tools on your test.
You can use the Unit 4 Review Guide to help you study and answer the practice questions.
Remember to press submit to check your answers!
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
The microscopic behaviors being investigated in this experiment are __________which shows __________.
Question 8
8.
Draw a model of how you think the water molecules interact with the penny and with the soap. Will anything change once the soap is added? Why or why not?
You can just sketch the model or describe how'd they interact.
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
The unique properties of substances can be explained by carefully looking at their _______
Question 13
13.
Question 14
14.
Question 15
15.
Question 16
16.
Question 17
17.
Is vinegar overall more polar or nonpolar? Explain your reasoning.
Which is true about bonding? Select all that apply
Ionic bonds are formed between a metal and an nonmetal
Ionic bonds are formed between 2 or more nonmetals
Ionic bonds are held together by positive and negative electrostatic forces of attraction
A triple bond results from sharing 6 electrons between 2 atoms
Ionic bonds are formed when electrons are transferred froma metal to a nonmetal
A double bond results from sharing 6 electrons between 2 atoms
Ionic bonds result from sharing 2 electrons between 2 different atoms
Covalent bonds are formed between 2 or more nonmetals
Covalent bonds reults from sharing 2 electrons between 2 different atoms
Which molecule has a trigonal pyramidal shape?
(Hint: Covalently bond the molecules using the 5 steps and then the VSEPR shape chart to figure this out)
SO3
CH4
BH3
PH3
Which is a nonpolar molecule?
(Hint: Covalently bond the molecules using the 5 steps and then the VSEPR shape chart to figure this out)
CO
SO3
NF3
Is it possible for a molecule to have bond dipoles and still be considered nonpolar?
True
False
If a compound is ionic then...
the electronegativity values between atoms are close together
the electronegativity values between atoms are far apart
In the dye chromatography lab, the higher the dye traveled up the paper, the ___________________soluble the dye was with the _________________ phase.
less, stationary
less, mobile
more, stationary
more, mobile
Which part of the investigation might be difficult to get a precise measurement?
Counting the number of drops of the penny
Measuring the height of the bubble
Measuring the drops of soap added
Repeating the experiment for 5 trials
Note: Volatitity means the ability to vaporize or turn from a liquid into a gas.
How would you group these substances based on the property data given above?
Silica (sand)
Calcium chloride (road salt)
Citric acid (in fruit/sweet and sour foods)
Sodium chloride (table salt)
Sucrose (sugar)
Naphthalene (moth balls)
Ionic
Polar Covalent
Nonpolar Covalent
Based on your groupings for the question above, which compounds have the strongest forces of attraction with water, a polar molecule?
Select all that apply
Silica (sand)
Calcium chloride (road salt)
Citric acid (in fruit/sweet and sour foods)
Sodium chloride (table salt)
Sucrose (sugar)
Naphthalene (moth balls)
How many lone pairs are around the central atom for CO3?
0
1
2
3
How many double bonds are in CO3?
0
1
2
3
What is the molecular shape for CO3?
tetrahedral
trigonal pyramidal
trigonal planar
bent
linear
Which of the following are considered covalent compounds when they bond together?