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Concept Check
Naming & Writing Ionic Compounds
Naming & Writing Molecular Compounds
Chemical Reactions
Writing & Balancing Chemical Equations
100
What is a chemical reaction?
A change in matter that produces new substances with new properties.
100
Name the following compound: LiF. Why is it an ionic compound?
Lithium Fluoride It is an ionic compound because the first part of the name is a metal ion whereas the second part of the name is a non-metal ion.
100
Name the following compound: CO. Why is it a molecular compound?
Carbon monoxide. It is a molecular compound because both parts of the name are non-metals.
100
What are two ways to tell that a chemical reaction has occurred?
1) change in energy 2) change in colour (products is different colour from reactants) 3) gas is formed (bubbles, odour) 4) precipitate is formed (solid subtance when two clear solutions are mixed)
100
Name the diatomic elements. (Hint: "diatomic 7")
1) hydrogen 2) nitrogen 3) oxygen 4) fluorine 5) chlorine 6) bromine 7) iodine
200
What is the term used for substances that react together in a chemical reaction?
Reactants
200
Write the chemical formula for calcium chloride.
CaCl(2)
200
Quick learning check: What is the difference between an ionic compound and a molecular compound?
Ionic compounds= first part of the name is a metal ion whereas the second part of the name is a non-metal. Molecular compounds= both parts of the name are non-metals.
200
Predict whether a chemical reaction has occurred for the following process: Frying chicken. If yes, state the evidence.
Yes. Evidence: odour
200
Write the following word equation as a chemical formula: sodium chloride ----> sodium + chlorine
NaCl ----> Na + Cl(2)
300
Identify the information listed for the element beryllium: a) symbol b) atomic number c) number of protons d) number of electrons
a) Be b) 4 c) 4 d) 4
300
Write the chemical formula of aluminum oxide.
Al(2)O(3)
300
Write the chemical formula of sulfur dioxide
SO(2)
300
What type of reaction is this? copper + silver nitrate ----> silver + copper nitrate
Single displacement reaction
300
Balance the following equation: ___ K + ___ Br(2) ----> ___ KBr
2 K + Br(2) ----> 2 KBr
400
What is WHMIS and what does it stand for?
WHMIS (Workplace Hazardous Materials Information System) provides information about how to store, handle and dispose of chemical substances.
400
Name the following compound: NaBr
Sodium bromide
400
Write the chemical formula for carbon tetrachloride.
CCl(4)
400
What type of chemical reaction is this? Water ----> hydrogen + oxygen
Decomposition reaction
400
Balance the following chemical equation: ___ S + ___ O(2) ----> ___ SO(3)
2 S + 3O(2) ----> 2 SO(3)
500
Identify the elements that make up the compound NaCl. How many atoms of each element are there?
Elements: Sodium (Na) and Chlorine (Cl). There is one atom of each.
500
Write the chemical formula of potassium sulfide.
K(2)S
500
Name the following compound: NO. Is this a molecular compound?
Nitrogen monoxide. Yes it is a molecular compound because both nitrogen (N) and oxygen (O) are non-metals.
500
How can you turn NaCl ----> Na + Cl (a decomposition reaction) into a synthesis reaction?
Flip it. Na + Cl ----> NaCl
500
Balance the following chemical equation: ___ As + ___ O(2) ----> ___ As(2)O(5) What type of reaction is this?
4 As + 5 O(2) ----> 2 As(2)O(5) This is a synthesis reaction.