Ionic Bonds
Covalent Bonds
Types of Reactions
Law of Conservation of Mass
Balancing Equations
100
What is an ionic bond made out of?
metal and nonmetal
100
What is a covalent bond made out of?
a nonmetal and a nonmetal
100
What are the 4 main types of reactions?
Synthesis, Decomposition, Single replacement, Double replacement
100
What is the Law of Conservation of Mass?
Mass cannot be created or destroyed, but it can be changed into another form
100
Why do we balance equations?
To obey the Law of Conservation of Mass
200
How do ionic bonds form?
Elements TRANSFER electrons
200
How do covalent bonds form?
Elements SHARE electrons
200
What type of reaction is this:
2H2 + O2 -> 2H2O
Synthesis
200
Which of the following statements is true about a balanced chemical equation?
a. the mass cannot be determined
b. mass of the reactants is greater than the mass of the products.
c. mass of the reactants is less than the mass of the products.
d. mass of the reactants is equal to the mass of the products.
d. mass of the reactants is equal to the mass of the products.
200
Balance the following equation:
Zn + HCl -> ZnCl2 + H2
a. Zn + HCl -> ZnCl2 + H2
b. Zn + 6HCl -> ZnCl2 + 3H2
c. Zn + 2HCl -> ZnCl2 + H2
d. 2Zn + 2HCl -> 2ZnCl2 + H2
c. Zn + 2HCl -> ZnCl2 + H2
300
Why does this image represent an ionic bond?
Ionic bonds form a crystal lattice, and that image represents one.
300
Which is an example of a covalent bond?
a. KCl
b. NaCl
c. SF2
d. CaBr2
c. SF2
300
What type of reaction is this:
Single replacement
300
How does this diagram obey the Law of Conservation of Mass?
The number of atoms is the same on each side of the reaction.
300
Which chemical equation correctly shows the formation of water from hydrogen and oxygen?
a. H2 + O2 -> H2O
b. H2 + O2 -> 2H2O
c. H + O2 -> H2O
d. 2H2 + O2 -> 2H2O
d. 2H2 + O2 -> 2H2O
400
Which pair of atoms correctly form an ionic bond?
a. Beryllium (Be) and Calcium (Ca)
b. Oxygen (O) and Sulfur (S)
c. Potassium (K) and Argon (Ar)
d. Magnesium (Mg) and Sulfur (S)
d. Magnesium (Mg) and Sulfur (S)
400
What is the formula for phosphorus pentachloride?
a. PCl
b. P5Cl
c. PCl5
d. P2Cl5
c. PCl5
400
What type of reaction is this:
CaCO3 -> CaO + CO2
Decomposition
400
Look at the models below. Which of the following models correctly shows the Law of Conservation of Mass and gives the correct explanation?
Model 1 because the number of atoms of each element is the same on both sides of the equation
400
When silver (Ag) reacts with hydrogen sulfide (H2S), the products are silver sulfide (Ag2S) and hydrogen gas (H2). Which of the following equations correctly describes this reaction?
a. Ag + H2S -> Ag2S + H2b. 2Ag + H2S -> Ag2S + H2
c. 2Ag + 2H2S -> Ag2S + H2
d. 2Ag + 2H2S -> 2Ag2S + 2H2
b. 2Ag + H2S -> Ag2S + H2
500
Using the correct IUPAC nomenclature, what is the correct name and corresponding formula for magnesium and iodine?
Magnesium iodide, MgI2
500
Which pair of atoms correctly form an covalent bond?
a. Beryllium (Be) and Calcium (Ca)
b. Oxygen (O) and Sulfur (S)
c. Potassium (K) and Argon (Ar)
d. Magnesium (Mg) and Sulfur (S)
b. Oxygen (O) and Sulfur (S)
500
What type of reaction is this:
KCl + AgNO3 -> AgCl + KNO3
Double replacement
500
A teacher demonstrated a chemical reaction by stretching a balloon containing baking soda over the top of a bottle containing vinegar. When the baking soda was added to the vinegar, the balloon began to inflate as shown in the picture below. How does the mass before the reaction compare to the mass after the reaction?
The mass will be the same before and after the reactions occurs.
500
Na2SO4 + SrCl2 -> 2NaCl + SrSO4
Is the above reaction balanced?
Yes!