Chemical Bonds
the force that holds two atoms together
What is a chemical bond?
Balance the following equation: H2O2 -> H2O + O2
What is 2H2O2 -> 2H2O + O2
The molar mass of CaCO3
What is 100.0869 g/mol (100 g/mol)?
The rate at which reactants change into products
Principle that states that if a stress is applied to a system at equilibrium, the equilibrium shifts in the direction that opposes the stress.
What is Le Châtelier's principle?
This type of chemical bond forms when electrons are transferred (typically between a metal and a nonmetal).
What is an ionic bond?
Balance the following equation: N2 + H2 -> NH3
What is N2 + 3H2 -> 2NH3
The mole amount of PbSO₄ in a 73 gram sample of PbSO₄
What is 73 grams divided by 303.26 g/mol (0.24 mol)
The substance that speeds up chemical reaction rates
What is a catalyst?
Steps to balance a chemical equation.
What is
1. Write chemical equation
2. Count the atoms on both sides
3. Choose coefficients to balance
4. Recheck number of atoms on both sides
The number of positive charges must be equal to the negative charges in order to form a ____________ compound.
What is neutral?
Balance the following equation: Mg + HCl -> MgCl2 + H2
What is Mg + 2HCl -> MgCl2 + H2
The mass of 0.674 mol of CO₂
What is 0.674 mol times 44.01 g/mol (29.7 g)?
What is a Synthesis Reaction
Steps for naming ionic binary compounds.
What is
1. Write the name of the positive ion
2. See if there is more than one oxidation number
3. Write the root name of the negative ion
4. Add the ending -ide to the root
An ion with a positive charge due to loss of electrons.
What is a cation?
Balance the following equation: Al(OH)3 + H2SO4 -> Al2(SO4)3 + H2O
What is 2Al(OH)3 + 3H2SO4 -> Al2(SO4)3 + 6H2O
Moles of MnO₂ in a 95 gram sample of MnO₂
What is 95 g divided by 86.9368 g/mol (1.09 mol)?
A precipitate, water, or gas forms when two ionic compounds in a solution are combined in this type of reaction. -is insoluble
What is a Double Displacement Reaction?
Scientist who established that the total mass of the products always equals the total mass of the reactants.
Who is Antoine Lavoisier?
A covalent bond in which the electrons are shared equally by the two atoms.
What is a nonpolar covalent bond?
Balance the following equation: FeS2 + O2 -> Fe2O3 + SO2
What is 4FeS2 + 11O2 -> 2Fe2O3 + 8SO2
The mass of 0.25 mol of NH₃
What is 0.25 mol times 17.031 g/mol (4.25 g)?
A reaction that ABSORBS energy in the form of heat
What is an Endothermic Reaction
Three ways to state the rate of a reaction.
What is
1. The rate at which one of the reactants is used up
2. The rate at which water is produced
3. The rate at which energy is released