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Worksheets2nd 9 weeks exam review 21-22
Total questions: 13
Worksheet time: 10mins
2 Al + 3 Br2 --> 2 AlBr3
This equation is considered what type of reaction?
Synthesis
Decomposition
single replacement
double replacement
The unbalanced chemical equation below represents a double replacement reaction.
__FeCl2 + __Na2CO3 → __FeCO3 + __NaCl
When the equation is correctly balanced using the smallest whole numbers, what is the
coefficient of NaCl?
6
4
3
2
KOH + HNO3 → KNO3 + H2O
Which process is represented by this equation?
Combustion
Single Replacement
Double Replacement
Synthesis
2 KClO3(s) → KCl(s) + 3 O2(g)
This process is considered what type of reaction?
Synthesis
Decomposition
Single Replacement
Double Replacement
Lithium chloride is formed by the reaction shown below.
NaCl(aq) + LiF(aq) → NaF(aq) + LiCl(aq)
The reaction is best described as — (select all that apply)
Single Replacement Reaction
Double Replacement Reaction
It involves two compounds exchanging ions
it involves a compound and an element exchanging ions
In a precipitation reaction, the products generally include an aqueous solution and a
substance in which state?
liquid
gas
solid
aqueous
Which is a correctly balanced equation for a reaction between hydrogen gas and
oxygen gas?
(A) 2 H2(g) + 2 O2(g) → H2O(g)
(B) H2(g) + O2(g) → 2 H2O(g)
(C) 2 H2(g) + O2(g) → 2 H2O(g)
(D) H2(g) + O2(g) → H2O(g)
A
B
C
D
Shown below are four equations, A, B, C, and D.
(A) 2Ag2O + Cl2 → 4AgCl + O2
(B)2K + CaF2 → 2KF + Ca
(C) 2CuO → O2 + 2Cu
(D) 2NaCl → 2Na + Cl2
Which two equations represent single replacement reactions?
A
B
C
D
When the equation
Fe2O3(s) + CO(g) → Fe(l) + CO2(g)
is correctly balanced using the smallest whole numbers, what will be the coefficient of
Fe(l)?
1
2
3
4
Which equation shows conservation of mass?
Na + Cl2 → NaCl
Al + Br2 → AlBr3
H2O → H2 + O2
PCl5 → PCl3 + Cl2
Look at the following chemical equation.
2 Ni2O3 → 4 Ni +3 O2
Is this chemical equation balanced?
Yes, because each atom in the reactants is found in the products
Yes, because the mass of the reactants is greater than the mass of the products
No, because the coefficient of the reactant is less than the sum of the coefficients
of the products
No, because the mass of the reactants is greater than the mass of the products
Chemical equations must be balanced because - (select all that apply)
mass can neither be created nor destroyed
total mass of reactants must equal total mass of products
mass is always greater on the reactants side
mass is always greater on the products side
Describe a decomposition reaction and give an example.
