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UPDATED Friday, February 5, 2010
Students have been give three pages of homework for weekend as we don not know when we will be back to normal again. They are titled FORMULAS NAME COMPOUNDS, FRONT ONLY 1-5, REACTION REPRESENTATION FRONT ONLY 1-7, BALANCED EQUATIONS BACK ONLY 1-10. SAVE OTHER SIDES TO DO IN CLASS. IT WILL BE GRADED SO IF THEY DO NOT UNDERSTAND EMAIL FROM BELOW OR ASK WHEN WE RETURN.
useful sites for practicing balancing equations.
I AM READY FOR THE SNOW TO BE OVER AND IT IS JUST STARTING.
If your students study only one thing have them study the following information I have included in PINK. Students should be making a study guide for the quiz ESPECIALLY IF THEY HAVE NOT BEEN PASSING MY QUIZZES.
Word Bank:
Compounds, NaCl, salt, chemical formula, Stoichiometry, reactants, elements, products, destroyed, matter,
Law of conservation of matter
Students should be able to place these words into sentences that are related to compounds and balancing equations:
These are TRUE Statements:
Compounds are two or more elements chemically combined.
Mixtures are combined physically.
CuSO4 is the chemical formula for copper sulfite.
There are 45 atoms in a single compound of table sugar.
Pure gold is an element 24 caret gold is a homogeneous mixture.
Water is made of 2 atoms of hydrogen and 1 atom of oxygen.
CO2 is the chemical formula for carbon dioxide.
Complete a chart about the differences between mixtures and compounds including if they are physically or chemically combined, what happens to their properties after they are combined, are they in set ratios, and 3 examples of each.
Students will also be expected to balance equations where the number of atoms is exactly the same for the reactants and the products.
Lastly can they state if a equation is balanced or not.
Many of these items are located on the multiple choice quizzes below:
IF WE HAVE A SNOW DAY ON MONDAY THE QUIZ IS THE FIRST DAY WE COME BACK TO SCHOOL AFTER THAT.
Some student brought home an Alien Periodic Table clicker activity. This is not a quiz just help for completing an activity we are doing in class today and tomorrow
There is a REAL quiz being rescheduled for next week. Not sure of exact date. The pre-quizzes are below. More specific information will follow by Friday.
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Some students need to finish Mendeleev's Castle. The information is below.
You and your friends have been magically transported inside an 18 room castle built by the famous chemist Dmitri Mendeleev. Each room is entirely made from one of the elements of the first three rows of the periodic table. No element is repeated. Each element will appear in the state (solid, liquid, or gas) it retains at room temperature.
You do not know where in the castle you have been transported. A holographic image of Mendeleev will accompany you on your journey, giving you clues to help you determine which room you are in. Each time you identify the element a room is made of, you will be transported to another room. Once you travel through all of the rooms, you will find your way out of Castle Mendeleev.
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1.) You and your friends have suddenly materialized into a room made entirely of a shiny metallic solid. A wooden door is set into one wall. A shimmering holograph appears before you. It is an old man with long brown hair and a full beard streaked with gray hairs. Wearing a full nineteenth-century topcoat, it is Dmitri Mendeleev himself. In a crisp, intelligent voice, the scientist says, "This room has been constructed of a strong, lightweight, corrosion-resistant metal composed of atoms containing 3 valence electrons and 13 protons. It is the most abundant metal in the Earth's crust." What element is this room make of? Carve its symbol into the wooden door to escape to the next room.
2.) The next room you find yourselves in is made of a clear, life-giving gas. Suddenly, Mendeleev appears again saying, "This element is a nonmetal, diatomic gas that comprises about 20 % of normal air. It combines with most other elements to form oxides." What symbol will you carve into the door of this room?
3.) Next, you and your friends are transported to a room made from a green-yellow gas which immediately begins to burn your nostrils and your throat. You reach into your packs for gas masks to protect yourselves from these noxious fumes. For the third time, a holograph of Mendeleev speaks to you through the shifting gas. "This diatomic gas is a halogen." What element surrounds you?
4.) In the next room you find yourselves surrounded by bright yellow crystals. As you remove the gas masks, the old chemist, tinted yellow by light reflecting off the crystals, appears yet again. "The atoms of this element have 6 valence electrons." Carve the symbol of the correct element in the room's door.
5.) You are now in a room made of a clear gas - located in one of the towers of the Castle Mendeleev. Trying to talk to your friends, your voice sounds high-pitched and squeaky, like Mickey Mouse. The holograph tells you, "The atoms of this element are also molecules." What element is this room made of?
6.) The sixth room you are transported to, on the second floor of the building, is made of a silver-gray metallic solid. Taking a knife out of your backpack, you are able to cut a piece of it off with the blade because the substance is very soft. A portion of the element touches your hand, burning your skin. Filling a small glass beaker with water from your canteen, you drop the substance in to observe its reaction with water. It momentarily floats on the water before causing a small explosion. What element is this?
7.) Next you are transported to a room with bright, white waxy walls. When you turn off the lights, the entire room glows in the dark! The holograph tells you, "This element occurs in teeth and bones as calcium phosphate." What element is this room comprised of?
8.) You are now in a room made of a shiny, silver metal. The image of Mendeleev reappears to say, "This element appears here in its pure form. If combined with traces of other elements, its becomes a semiconductor that is used in circuits of electronic devices such as calculators. It and oxygen are the two elements that make sand but not diamonds." What element is he speaking of?
9.) The ninth room is composed of a gas that has no color, taste, or odor. A transparent image of the chemist tells you, "An atom of this element has 2 electrons in its first energy level and 5 electrons in its second energy level. This element makes up approximately 80 % of normal air and can be used to make laughing gas." What is the element?
10.) The next room you are transported to is made of a soft white material. The nineteenth-century chemist states, "The atoms of this element have a low electron affinity and will replace hydrogen atoms when placed into water. This room is on the second floor of my castle." Which element is this?
11.) Next, you are transported to a room in the corner of the Castle Mendeleev. The room is made of a thick, inert gas. Mendeleev flickers into view to tell you, "This element is used to fill light bulbs. The atoms of this element have 8 electrons in their third energy level." Carve the correct symbol into the door.
12.) After escaping from room eleven, you materialize into a room made of a solid substance. Mendeleev's image appears in front of you and says, "This element is the basic unit for all living things. Without it, jewelers would go broke, gas stations would go out of business, and every breath you exhale would be incomplete. The element has two isotopes, one has 6 neutrons and the other has 8 neutrons." What element is this room constructed of?
13.) The next room you enter is filled with an inert gas. Mendeleev appears, telling you, "This gas emits a brilliant orange-red light when contained in a discharge tube. Las Vegas wouldn't be the same without this element." What is the element?
14.) This room is made of a light gray metal. Again the image of Mendeleev speaks, "This element is so strong, hard, and elastic that it is used to reinforce other metals. Its melting point is nearly 1300 oC." What element is this room made of?
15.) The next room is made of a hard, black, shiny material, and then suddenly it changes to a brown powder. The holograph of the chemist tells you the atoms of this element have 2 energy levels, and it conducts electricity and heat very poorly. But, because it readily absorbs neutrons, it is used in control rods for nuclear reactors. What element built these walls?
16.) The sixteenth room you enter is made of a green-yellow gas. The image tells you, "The atoms of this element have a high electron affinity. When one combines it with sodium, it can help reduce tooth decay. It also reacts with hydrocarbons to form Teflon and Freon." What element is he speaking of?
17.) Next you have been transported to a room on the first floor of the Castle Mendeleev, that is made of a white solid. The holograph of Dmitri Mendeleev reappears, shifting before you like a milky ghost, speaking to you once more. "This element is widely used in aerospace industries in alloys with other metals. It burns brilliantly in air. The atoms of this element form positive ions. One of its atoms will combine with one oxygen atom to form a compound." The walls of this room are comprised of what element?
18.) You finally find yourself in the second tower of Castle Mendeleev. The room is made of a transparent gas. This element is the simplest and lightest of all the elements. It is the most abundant element in the universe. What element is it?
Upon carving the correct symbol into the final door, you and your friends are transported to a large dining hall. The holographic image of Dmitri Mendeleev, who has accompanied you throughout your journey, stands at the end of a long table set for dinner. Speaking to your group for the last time, he says, "Congratulations adventurers. Come, have a seat and drink to your victory with a toast of complex carbon, hydrogen, and oxygen compounds dissolved into a liquid compound of hydrogen and oxygen." Don't worry, it's just lemonade.
Chemical Equations/ Compounds PreQuiz- Answers are in RED
1. A _______ _______ is a short way of describing a chemical reaction.
Chemical equation
Chemical symbol
Chemical formula
2. _______ are substances that react during a chemical reaction.
Products
Reactants
Atoms
3. The substances that are produced are called__________.
products
reactants
sums
4. (picture of an arrow)This is a(n) ______ sign it indicates what is yielded from a chemical reaction.
arrow
stop
yield
5. The + means _____or _______ when used in a chemical equation.
this, that
yes, no
and, add
6. What does the Law of Conservation of Mass state?
Matter may be created and destroyed
Matter cannot be created or destroyed
Matter cannot change from one form to another form.
7. Choose the chemical formula below:
Fe
H2O
Ca
8. The symbol "aq" can be used to indicate if a substance is…
a solid
a gas
dissolved in water
9. In the chemical equation
C6H12O6 +6O2 arrow 6CO2 +6H2O
the products are:
C6H12O6 and 6O2
6CO2 and 6H2O
C6H12O6 and 6H2O
10. In the chemical equation
C6H12O6 +6O2 arrow 6CO2 +6H2O
the reactants are:
C6H12O6 and 6O2
6CO2 and 6H2O
C6H12O6 and 6H2O
11.What coefficient would balance this equation?
2CO + O2 yeilds____CO2
3
2
4
12. What coefficient would balance this equation?
4Mg + O4 =____MgO
3
2
4
13. What is wrong with this equation? F2+S yields SF6
There are too many F’s in the product
There are too many S’s in the product
There are too many F’s in the reactants
14. Is this equation balanced or unbalanced?
2Li+O2 yields 2Li2O
Balanced
Unbalanced
15. Is this equation balanced or unbalanced? 3Zn+O3 yields 3ZnO
Balanced
Unbalanced
16.What coefficients balance this equation? ___BaO2 arrow ____BaO +O2
3, 2
2, 4
2, 2
17.What coefficients balance this equation? ____Al+___O2 arrow ___Al2O3
4, 2, 2
4, 4, 4
4, 3, 2
18. How many atoms of each element are there in the reactants?
2Na3+3Cl2 yields __NaCl
Na=5, Cl=5
Na=6, Cl=4
Na=6, Cl= 6
19. What would be the product of this equation?
2KClO3 yields
2KCl+3O2
4KCl+5O2
KCl+O2
20. What are the products in this equation?
C6H12O6 + 6O2 =3CO2 +6H20
Salt and water
Water and carbon monoxide
Carbon dioxide and water
21. What is balancing equations called?
Balneology
Stoichiometry
Equivalency
22. What are the reactants in this equation? 16Cu+S8=8Cu2S
Copper, sulfur
Carbon, silver
Calcium, scandium
23. What is the product in this equations? 16Cu+S8=8Cu2S
Copper, sulfur
Copper sulfide
Carbon Monoxide
24. Is Cr2O3+N2+4H20=(NH4)2Cr2O7 balanced or unbalanced?
Balanced
Unbalanced
25. Why is Cr2O3+N2+4H20=(NH4)2Cr2O7 balanced?
Because the total number of atoms equals 24 on both sides
Because there are exactly the same number of each type of atom in the reactants and product
Because they have the same substance in the product and the reactants
More information on next weeks quiz. Answers are in deep pink.
1. Elements are the _________ substances.
simplest
largest
tastiest
2. Elements are represented by…
Two or three lettered words
One letter symbols
One to three letter symbols
4. All elements and compounds can have specific ______ and _________ properties
Floral, fauna
Physical, chemical
Spatial, lateral
3. Compounds are also ______ substances like elements
solid
pure
liquid
5. Compounds are represented by words or a ______ ________.
Chemical symbol
Chemical language
Chemical formula
6. Which is not a way that compounds are different from mixtures
They are chemically combined
They maintain their original elemental properties
They are in set ratios
7. Which is a false statement?
Elements are chemically combined
Compounds are chemically combined
Mixtures are physically combined
8. What is the chemical formula for table sugar?
NaCl
H2O
C12 H22 O11
9. What is the chemical formula for Copper sulphate?
NaOH
CuSO4
CO2
10. What compound has the formula NaCl?
Sodium chlorate
Sodium chlorize
Sodium chloride
11. What happens to the properties of elements when they combine to form compounds?
Stay the same
Change into new
Nothing
12. This is a ______ molecule (shows two H and one O atoms combined)
Salt
Sugar
Water
13. ________compounds happen when the atoms share the electrons.
Ionic
Covalent
Valence
14. Ionic compounds happen when electrons are ______ from one atom to another.
Shared
Gained
Lost/donated
15. What is the chemical formula for lye?
NaOH
HCl
NaCl
16. What proof do you have that properties of elements change when forming compounds
Hydrogen and Oxygen are both liquids but water is a solid
Sodium and chlorine and inedible but salt is used as a seasoning
Carbon in a solid, oxygen is a gas but carbon monoxide is a liquid
17. Which are highly reactive metals?
Helium, neon
Gold, silver
Magnesium, sodium
18. Which are less reactive metals?
Gold, silver
Calcium, magnesium
Lithium, sodium
19. Fluorine, chlorine, and oxygen are...
Non reactive metals
Non reactive gases
Highly reactive nonmetals
20. Gold is a(n)…
element
compound
mixture
21. Granite is a(n)
element
compound
mixture
22. Salt is a(n)
element
compound
mixture
23. How many atoms of carbon are in rubbing alcohol (C3H8O)?
One
Eight
Three
24. How many total atoms are in one molecule of table sugar(C12 H22 O11)?
12
45
3
25. Which is the correct formula for laughing gas that is made up of two atoms of nitrogen and one atom of oxygen?
2NO
O2N
N2O
26. Wood is a(n)?
Homogeneous mixture
Heterogeneous mixture
Compound
27. Fourteen carat gold is a(n)?
Element
Compound
Homogeneous mixture
28. Salt water is a(n)?
Complex compound
Element
Homogeneous mixture
29. Which is not an example of matter?
Sunglasses
Beach towel
Sunlight
30. Air is a(n)?
Homogeneous mixture
Element
Compound
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