Unit 7 and 8 Review
Presentation
•
Chemistry
•
10th Grade
•
Practice Problem
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Easy
+2
Standards-aligned
Matthew McCombs
Used 2+ times
FREE Resource
10 Slides • 13 Questions
1
2
Watch this video closely!
3
Categorize
Change in color
Formation of a precipitate
Release of gas
Change in temperature
Formation of a new substance
Change in odor
Change in energy
Change in shape
Change in size
Change in state of matter
Change in texture
Change in density
Change in volume
Change in magnetism
4
Do you have these answers for number 1?
Was there a:
Change in Color
Creation of a gas
Creation of a precipitate
Change in odor/smell
Change in Temperature
Light produced
Atoms are rearranged
Check your review.
5
Aqueous potassium iodide, KI, is mixed with aqueous lead(II) nitrate, Pb(NO3)2, a yellow solid forms in the clear solution.
Watch and See!
NaOH (s) + H2O (l) → Na+ (aq) + OH- (aq) + H2O (l)
Watch and See!
Watch and See!
6
Do you have these answers for #2?
a) A chemical reaction has occurred because there is a change in color, a new substance is formed, and that new substance is a solid precipitate.
b) A chemical reaction has occurred as the ions are no longer bonded to each other but are separated by water molecules. This is known as disassociation.
c) A chemical reaction has occurred as the atoms have been rearranged, new substances have been created, and this is likely a decomposition reaction.
Check your review.
7
Five steps to easy balancing. Watch the quick video to review.
Balancing Chemical equations
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Dropdown
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12
Match
Match the type of reaction with the simplified formula example.
Decomposition
Single Replacement
Double Replacement
Synthesis
Combustion
AB→A+B
A+BC→AC+B
AB+CD→AD+CB
A+B→AB
A+O2→CO2+H20
AB→A+B
A+BC→AC+B
AB+CD→AD+CB
A+B→AB
A+O2→CO2+H20
13
Do you have these answers for #3?
a) 2AgNO3(aq) + CaCl2(aq) → 2AgCl(s) + Ca(NO3)2(aq); Double
b) 2C2H6(g) + 3O2(g) → 2CH3COOH(g) + 2H2O(g); Combustion/Synthesis
c) 2HCl (aq) + Ba(OH)2(aq) → BaCl2(aq) + 2H2O(l);Double
d) 4Al(s) + 3O2(g) → 2Al2O3(s) ; Synthesis
Check your review.
14
Multiple Choice
Which skeletal chemical equation represent the word problem below?
When solid potassium chlorate (KClO3) is strongly heated in a flame it forms oxygen gas (O2) and solid potassium chloride (KCl).
KClO3→O2+KCl
KClO3(s)→O2(g)+KCl(S)
O2(g)+KCl(S)→KClO3(s)
O2+KCl→KClO3
15
Multiple Choice
Which skeletal chemical equation represent the word problem below?
Solid zinc and aqueous lead (II) nitrate (Pb(NO3)2) react to form aqueous zinc nitrate (Zn(NO3)2) and solid lead.
Zn+Pb(NO3)2→Zn(NO3)2+Pb
Zn(s)+Pb(NO3)2(aq)→Zn(NO3)2(aq)+Pb(S)
Zn(S)+Pb(NO3)2→Zn(NO3)2+Pb(S)
Zn+Pb(NO3)2(aq)→Zn(NO3)2(aq)+Pb
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Match
Match the following reaction type to the chemical formula.
Decomposition
Double Replacement
Synthesis
Single Replacement
Combustion
KClO3(s)→O2(g)+KCl(S)
2AgNO3(aq)+ MgCl2(aq)→Mg(NO3)2(aq)+2AgCl
2Mg(s)+O2(g)→2 MgO(s)
Zn(s)+Pb(NO3)2(aq)→Zn(NO3)2(aq) + Pb(S)
C2H8(g) + 5O2→3CO2(g) + 4H20(g)
KClO3(s)→O2(g)+KCl(S)
2AgNO3(aq)+ MgCl2(aq)→Mg(NO3)2(aq)+2AgCl
2Mg(s)+O2(g)→2 MgO(s)
Zn(s)+Pb(NO3)2(aq)→Zn(NO3)2(aq) + Pb(S)
C2H8(g) + 5O2→3CO2(g) + 4H20(g)
17
Do you have these answers for #4?
a) KClO3(s)→O2(g)+KCl(S); 2KClO3(s)→3O2(g)+2KCl(S); Decomposition
b) Zn(s)+Pb(NO3)2(aq)→Zn(NO3)2(aq)+Pb(S); Balanced; Single Replacement
Check your review.
18
There is a way to determine whether a single replacement reaction will occur. WATCH THE VIDEO!
Predicting the Future
19
Multiple Choice
Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + 2Ag(s)
Copper is more reactive than silver; therefore, copper will replace silver.
Copper is less reactive than silver; therefore, copper will replace silver.
Copper is more reactive than silver; therefore, Silver will replace Copper.
Copper is less reactive than silver; therefore, silver will replace copper.
20
Multiple Choice
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
Magnesium is more reactive than hydrogen; therefore, magnesium will replace hydrogen.
Magnesium is less reactive than hydrogen; therefore, magnesium will replace hydrogen.
Magnesium is more reactive than hydrogen; therefore, hydrogen will replace magnesium.
Magnesium is less reactive than hydrogen; therefore, no reaction will occur.
21
Multiple Choice
2Na(s) + 2H2O(aq) → 2NaOH(aq) + H2(g)
Sodium is more reactive than hydrogen; therefore, sodium will replace hydrogen.
Sodium is less reactive than hydrogen; therefore, sodium will replace hydrogen.
Sodium is more reactive than hydrogen; therefore, hydrogen will replace sodium.
Sodium is less reactive than hydrogen; therefore, no reaction will occur.
22
Multiple Choice
Zn(s) + CaCl2(aq) → ZnCl2(aq) + Ca(s)
Zinc is more reactive than calcium; therefore, zinc will replace calcium.
Zinc is less reactive than calcium; therefore, zinc will replace calcium.
Zinc is more reactive than calcium; therefore, calcium will replace zinc.
Zinc is less reactive than calcium; therefore, no reaction will occur.
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Our test is on Wednesday, May 22nd, 2024.
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