Chemical Evidence
Name one of the five types of chemical reactions we studied
synthesis, decomposition, single replacement, double replacement, combustion
A number placed in front of a chemical formula (multiplies the number of atoms for each element)
coefficient
Difference between physical and chemical change
Characteristics of substances that describe their ability to change into other substances
chemical properties
A + B --> AB
Synthesis
A small number on the lower right corner of an element that describes how many atoms of that element are in the compound
subscript
What does the law of conservation of mass state?
During a chemical reaction, matter cannot be created or destroyed.
AB --> A + B
Decomposition
What the arrow represents in the chemical equation
Yield, or reacts to form, produces
If I perform a chemical reaction inside of a glass container and it feels cool to the touch. Is it endothermic or exothermic?
In a balanced equation, the equation must have the same number of ___ on each side of the arrow
atoms
A + BC --> B + AC
single replacement
Classify this equation: 2SO2 + O2 = 2SO3
synthesis
In the replacement reaction below; what compound or element is missing:
FeCl3 + 3NaOH --> Fe (____)3 + 3NaCl
OH
List 3 possible supporting details (evidence) that a new substance formed
change in energy, light, spark, bubbles, gas released, unexpected color change, odor change, etc.
True or false: Molecules must stay the same after a chemical reaction takes place
False
How you know the reaction is combustion?
Oxygen is a reactant in the chemical equation/ water and carbon dioxide are in the products
Classify this equation: 2Fe2O3 + 3C = 4Fe + 3CO2
single replacement