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WorksheetsChemical Reactions Bellwork
Total questions: 15
Worksheet time: 22mins
Name
Class
Date
1.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
2.
In chemical reactions, the law of conservation of mass is......
a)
disobeyed
b)
not true
c)
obeyed
d)
used sometime
3.
Balance this equation, Ca + H2O --> CaO + H2
a)
Ca + 2H2O --> CaO + 2H2
b)
2Ca + H2O --> CaO + H2
c)
Its balanced as it is
d)
Cannot be balanced
4.
Name this reaction, Cl2 + 2KI --> I2 + 2KCl
a)
Synthesis
b)
Single Replacement
c)
Double Replacement
d)
Decomposition
5.
In a Chemical Reaction, the Law of Conservation of Mass states?
a)
Matter is present.
b)
Matter is NOT created or destroyed.
c)
Matter is created and destroyed.
6.
Which is a Synthesis Reaction?
a)
A + B ----> AB
b)
AB -----> A + B
7.
Which is a Decomposition Reaction?
a)
AB --> A + B
b)
ab ----> a + B
8.
A Precipitate forms
a)
when a gas is bubble through a liquid
b)
a lighter taper causes a gas to burn
c)
after a reaction and causes cloudiness (caused by a solid forming)
9.
Predict the following reaction
NaCl + Ca(NO3)2 -->
NaCl + Ca(NO3)2 -->
a)
no reaction both products are aqueous
b)
Calcium chloride and sodium nitrate are produced
c)
sodium nitrate is a solid formed
d)
calcium chloride is the solid formed
10.
Which reaction between halogens and halide salts will occur?
a)
F2(g) + FeI2(aq) → FeF2(aq) + I2 (g)
b)
Cl2(g) + SrF2(aq) → SrCl2(aq) + F2(g)
c)
I2(g) + MgBr2(aq) → MnI2(aq) + Br2(g)
d)
Br2(l) + CoCl2(aq) → CoBr2(aq) + Cl2(g)
11.
If the reactants on the left side of a chemical equation are C₃H₈ + 5O₂, the products in a balanced equation could be
a)
4CO₂ + 3H₂O
b)
3CO₂ + 4H₂O
c)
2CO₂ + 3H₂O
d)
3CO + 4H₂O
12.
Predict the products of this synthesis reaction: H2 + Cl2 →
a)
HCl
b)
H2Cl2
c)
H2Cl
d)
HCl2
13.
Predict the products for the this Single Replacement reaction:
K + HCl →
a)
KCl + H2
b)
KHCl
c)
KH + Cl2
d)
HCl + K2
14.
Predict the products for the this Double Replacement reaction:
AgNO3 + KCl →
a)
AgCl + KNO3
b)
AgK + ClNO3
c)
KAg + NO3Cl
d)
AgCl + 3 KNO
15.
Predict the products for the decomposition of aluminum oxide, Al2O3 →
a)
Al + O2
b)
O + Al2
c)
Al2 + O3
d)
Al + O
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