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WorksheetsChemical Reactions
Total questions: 19
Worksheet time: 10mins
The "up arrow" in a chemical reaction indicates_____
Production of a gas (right side only)
reversible reaction
heated
What does the plus+ sign mean in a chemical reaction?
heated
production of precipitate
combines or reacts with
What does the down arrow on the right side only symbolize?
heated
production of gas
production of precipitate
What does the arrow going both ways symbolize?
<----------->
reversible reaction
production of gas
equals or yeilds
What does the triange above the yield sign -------> mean?
combines
heated
production of gas
What does " s, l, g, aq " symbolize?
solid, liquid, gas, aqueous
sand, light, ground, aqueous
silicon, lithium, germanium, aqueous
What is the difference between a physical change and a chemical reaction?
In a physical change you can get your original substance back again.
a chemical reaction will only have a color change.
in a physical change, heat will be involved
In a _______ reaction, new substances are produced, existing bonds are broken, atoms are rearranged, and new more stable bonds are formed.
physical
chemical
metallic
Hydrogen, Nitrogen, Oxygen, fluorine, chlorine, bromine, and iodine are considered_____________.
metals
the super seven
the great seven
The large number in front of a substance in a chemical reaction
is called a(n) ________.
subscript
coefficient
multiple
_______ are numbers that come after a symbol and below.
coefficients
subscripts
replacements
A catalyst is a substance that
speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction
slows down a chemical reaction
neutralizes a chemical reaction
In order for a chemical reaction to be balanced, the number of ____ must be equal on both sides.
compounds
moles
atoms
AB ---------> A + B
is an example of:
synthesis
combustion
decomposition
A + B--------> AB
is an example of:
single replacement
synthesis
combustion
CxHy + O2--------> CO2 + H2O
double replacement
combustion
synthesis
A + BC---------> AC + B
synthesis
single replacement
combustion
AB + CD -------> CB + AD
single replacement
decomposition
double replacement
The following are the 4 indicators of a chemical reaction:
heat/light
gas
color change
precipitate
heat
shape
size
color
heat
size
smell
taste
