Balancing Equations
According to the law of conservation of matter, the amount of mass that goes into a chemical reaction must __________________________
What is . . .
come out?
(allow other phrasing with same meaning)
In this type of chemical reaction, there is one reactant that breaks down to form multiple products.
What is . . .
a decomposition reaction?
In an oxidation reaction, electrons are __________.
What is . . .
lost?
(accept other answers with same meaning)
If a substance is INsoluble, this is what would be written in (__) after its formula.
What is . . .
(s)
This is the date of the winter solstice in the Northern hemisphere in 2025.
What is . . .
December 21?
What is . . .
8 grams?
In the reaction Zn + HCl, the zinc will replace this element.
What is . ..
hydrogen (H)?
This element was oxidized.
(Its oxidation state increased)
Fill in the ( ) of states that would be true for a precipitation reaction.
Reactant (__) + Reactant 2 (__) --> Product (__) + Product 2 (__)
What is . . .
Reactant (aq) + Reactant 2 (aq) --> Product (s) + Product 2 (aq)
(One of the products should be s, all others aq)
This is the number of sides in a snowflake.
What is . . .
6?
This would be how you would write 3 molecules of dihydrogen monoxide in formula form.
What is . . .
3 H2O
What is . . .
double replacement?
This is the oxidation state for each element in AgCl.
What is . . .
Ag = +1
Cl = -1
Soluble or insoluble?
NaNO3
What is . . .
soluble
This is the scientific name of the Northern lights.
What is . . .
Aurora Borealis?
____ Na + _____ F2 --> ___NaF
What is . . .
2 Na + 1 F2 --> 2 NaF
This is a prediction of the full balanced equation for:
C6H12 + O2
What is . . .
C6H12 + 9 O2 --> 6 CO2 + 6 H2O
This is the oxidation state for each element in K3PO4
What is . . .
K= +1
P= +5
O= -2
This is the () that would be written after AgBr.
What is . . .
(s)
This is the country that will host the 2026 Winter Olympics.
What is . . .
Italy?
(In Milan and Cortina d'Ampezzo)
Write the balanced equation:
Aluminum combines with oxygen to make aluminum oxide.
What is . . .
4 Al + 3 O2 --> 2 Al2O3
This is the full balanced equation for
Hydrogen sulfate + barium chloride
What is . . .
H2SO4 + BaCl2 --> 2 HCl + BaSO4
In the reaction
2 Zn + O2 --> 2 ZnO
this is the element that got reduced.
What is . . .
Oxygen (O)
(went from zero to -2 oxidation state)
This is the proof of whether or not this is a precipitation reaction:
Co(NO3)2 (aq) + NaOH (aq)
What is . . .
Co(NO3)2 (aq) + 2 NaOH (aq) --> 2 NaNO3 (aq) + Co(OH)2 (s)
The cobalt hydroxide product is insoluble which will form a precipitant.
Within +/- 2,000, this is the number of LED lights that will be in the NYC Times Square ball on New Year's Eve this year.
What is . . .
32,256 LED lights.