Test 3 Trimester 1 Flashcards
Chemical reactions are ____________ (place)
Everywhere
How do you know when a chemical reaction takes place
Color change, gas formation, oder, temperare change, change in acidity, and precipitate formation
In a chemical reaction, matter is not
Created or destroyed
These represent chemical reactions
Chemical equations
when all substances in a compound are
combined with oxygen, which then produces carbon dioxide and water.
is commonly called burning. It is an exothermic reaction, which
means heat is produced. An example of a reaction is as follows:
CxHy + O2 –> CO2 + H2O
Combustion
when there is a combination of two or more
substances and a new compound is made. An example of a reaction is as
A + B –> AB
Synthesis
the opposite of synthesis. It is when a
compound is broken down into simpler substances. An example of
AB –> A + B
Decomposition
one element of a
compound is replaced with another element of a reacting compound. An example
A + BC –> AC + B
Single replacement
two elements of two
different compounds are replaced (or exchanged) to yield two new compounds.
An example of a reaction is as follows:
AB + XY –> AY + XB
Double replacement
Ionic bonds are formed between
Metals and non-metals
A transferring of electrons between atoms, as opposed to sharing those electrons, leads to
Ionic bonding
Molecules that have formed from ionic bonds tend to have ______ melting and boiling points, and a __________conductivity for electricity than those formed from covalent bonds.
Higher
can be used to determine whether a bond is polar covalent, nonpolar covalent, or ionic.
Electronegativity
refer to those bonds between atoms that are equally sharing electrons.
Polar covalent
Uneven bonding
Polar
0.4 electronegativity and under are
Non-polar
Are you going to do ok on this test
Hopefully
