Chemical Reactions
What occurs when an atom gains or loses electrons
What is ionic bonding?
One element replaces another element in a compound.
What is a simple replacement?
An atom with a + or - charge
What is an ion?
Process where one or more elements or compounds are changed into one or more different substances
What is a chemical reaction?
Balance the equation with correct coefficients:
___ H3PO4 + ___ KOH --> ___ K3PO4 + ___ H2O
What are 1, 3, 1, 4?
Small number to the lower right of an atom that represents the numbers of atoms of that element in the molecules
What is a subscript?
Two or more substances combine to form a new compound.
What is synthesis?
Ionic bonds occur between a _____ and a ____.
What is a metal and a nonmetal?
A compound decomposes into two or more simpler substances.
The new substance(s) in a chemical reaction
What is the product?
Whole number in front of the formula that represents the relative number of moles in that substance
What is a coefficient?
What occurs when an atom shares electrons
What is covalent bonding?
Is this a balanced chemical equation?:
H2 + NaCl --> 2HCl + 2Na
What is no? 2 Na and 2 Cl were created
In the formula 5CaSO4, this is the number of oxygen atoms.
What is 20?
Covalent bonds occur between two __________.
What are nonmetals?
A substance will combine with oxygen and in the process, give off energy in the form of light and heat.
What is combustion?
The original substance(s) in a chemical reaction
What is the reactant?
DAILY DOUBLE
Tell a chemistry joke
The reaction 2HgO ---> 2Hg + O2 is an example of this type of reaction.
What is decomposition?
Is this a balanced equation?: 2Na + 2H2O --> 2NaOH + H2
What is yes? There is 2 Sodium, 4 Hydrogen, and 2 Oxygen.
How you know a chemical change has taken place.
What is temp. change, color change, odor change, formation of a precipitate, formation of a gas?
2 rules for balancing equations
What is (any 2 of the following)?
1. You can only add a coefficient in front of a chemical formula
2. You cannot change any subscripts, nor add any subscripts
3. You may not place a coefficient in the ‘middle’ of a chemical formula
4. You must end up with the same number and kinds of atoms on both sides of the equation when you are finished. Count atoms on both sides uponcompletion to check yourself.
What is the chemical equation for potassium and diboron trioxide yield potassium oxide and boron.
What is K + B2O3 --> K2O + B?
Identify the type of chemical reaction:
___ HCl + ___ NaOH --> ___ NaCl + ___ H2O
What is Double Replacement?
Balance the following equations with correct coefficients:
___ Na + ___ NaNO3 --> ___ Na2O + ___ N2
What are 10, 2, 6, 1?