Vocabulary
What type of reaction creates one new substance from multiple reactants.
Synthesis
In a chemical reaction, what are the substances to the right of the arrow are called?
Products
When balancing an equation, these small numbers can not be changed in chemical compounds.
Subscript
What type of reaction is this?
2HgO ---> 2Hg + O
Decomposition
How many oxygen atoms are in this formula?
5CaSO4
20
What number represents how many of a particular compound/molecule there are in a chemical equation?
Coefficient
What do you call a substance that is put into a chemical reaction?
Reactant
Balance the equation:
Cl2 + Na --> NaCl
Cl2 + 2 Na --> 2 NaCl
What type of reaction is this?
NH3 + HCl -> NH4Cl
Synthesis
Is baking cookies a physical or chemical change?
Chemical Change
What is a solid that is formed within a solution during a chemical reaction?
Precipitate
What are the products of a combustion reaction?
Water and carbon dioxide
When balancing an equation this type of number CAN be changed (hint- it can be seen as a large number in front of the chemical formula)
Coefficients
What type of reaction is this?
C2H4 + O2 → CO2 + H2O
Combustion
Is dissolving salt in water a physical or chemical change?
Physical Change
A reaction in which a hydrocarbon reacts with oxygen gas, releasing energy in the form of light and heat
Combustion
Give three pieces of evidence that a chemical reaction has taken place.
Temp. change, color change, odor change, formation of a precipitate, formation of a gas, or light.
Balance the reaction: Na + H2O --> NaOH + H2
2Na + 2H2O --> 2NaOH + H2
What type of reaction is this?
Ca + AlP → Al + Ca3P2
Single Replacement
This type of reaction occurs when an element switches with another element in a compound, producing a new compound and a new element.
Single Replacement
This type of reaction absorbs heat from its surroundings and feels cold.
Endothermic
What has to be same on both sides of the equation for it to be balanced?
Number of atoms of each element
Balance the reaction:
CaCl2 + Na3PO4 --> Ca3(PO4)2 + NaCl
3 CaCl2 + 2 Na3PO4 --> Ca3(PO4)2 + 6 NaCl
What type of reaction is this?
AgNO3 + NaCl -> AgCl + NaNO3
Double Replacement
State the Law of Conservation of Mass.
Matter can not be created or destroyed.