Equations
Mole
Stoichiometry
Redox
Lab Equipment
100
What does the Law of Conservation of Mass say about the numbers and types of atoms on both sides of the equation?
They should be equal.
100
How many particles are in a mole?
6.02 x 10 23 particles (Avogadro's number)
100
What is a limiting reactant?
Reactant in the shortest supply.
100
What is oxidation?
Loss of electrons
100
In what piece of equipment do we sterilize laboratory glass ?
Autoclave
200
On what side of the chemical equation do you find the reactants?
LHS
200
Which has more grams in a mole: NaCl or NaHCO3 ?
NaHCO3
200
What is an excess reactant?
Reactant in the greatest supply.
200
What is reduction?
gain of electrons
200
What piece of equipment (under negative pressure) is used to purify aspirin crystals?
Buechner funnel
300
On what side of the chemical equation do you find the products?
RHS
300
What represents moles in a chemical equation?
Coefficient
300
How do you get the grams for a reactant or product?
You add up the mass numbers of the chemical and you multiply by the coefficient; then you change the units to grams.
300
What is an antioxidant?
Chemical found in beans, fruit and vegetables that counteracts the oxidation (destruction) of cells by free radicals (rogue ions)
300
Name 3 pieces of glassware used in the synthesis of aspirin.
Erlenmeyer flask(s), watch glass, beaker (s)
400
What does the arrow mean?
"yields" or there has been a chemical reaction
400
If there is more than one mole in a reactant or product, what must you do to the total mass number of the reactant or product to get the grams?
Multiply the grams by the number of moles
400
What will happen to the total grams on both sides of the equation as a result of stoichiometry?
The total grams on both sides will be equal.
400
Give three examples of oxidation.
Apple browning Iron rusting Silver tarnishing
400
Why don't we get 100% of our product yield?
Human and instrument error
500
Why do we need to write equations?
To express what happens in a chemical reaction concisely without words.
500
Why are moles used in chemistry?
To be a numerical common denominator in order to do chemical math
500
Why is stoichiometry important to chemistry?
To prevent waste of reactants and money in synthesizing compounds.
500
Why are redox reactions important?
They occur frequently in metabolism, especially cellular respiration.
500
How are compounds cooled and heated in the lab?
Cooled: ice water bath or left on counter till cool. Heated: hot water bath on a heating plate or with a bunsen burner
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