WorksheetsAP Chemistry Unit 4 Review
Total questions: 21
Worksheet time: 5hrs 15mins
Chemical or physical change? 2 H2O(l) + O2(g) → 2 H2O2(l)
Chemical
Physical
Chemical or physical change? H2O(l) → H2O(g)
Chemical
Physical
Which observation suggests a chemical change occurred?
The mass stays constant
The solution stays colorless
A precipitate forms
In order to be considered an oxidation-reduction reaction,
a precipitate must form
the oxidation number of two species must change
the pH must change
In order to be considered an acid-base reaction,
a precipitate must form
the oxidation number of two species must change
one or more protons must be transfered
An acid is defined as a...
proton donor
proton acceptor
An base is defined as a...
proton donor
proton acceptor
In this example, H+ + H2O -> H3O+ the water acts as a(n)
acid donating a proton
acid accepting a proton
base donating a proton
base accepting a proton
Given the following: NH3(aq) + HCl(aq) ⇄ NH4+(aq) + Cl-(aq)
The Brønsted-Lowry acids in the reaction represented above are
NH3(aq) and NH4+(aq)
HCl(aq) and NH4+(aq)
HCl(aq) and Cl-(aq)
NH3(aq) and HCl(aq)
2Ca(s) + O2(g) → 2CaO(s), calcium is...
_Zn+_HCl-->_ZnCl2 +_H2
What is the oxidation number assigned to manganese in KMnO4?
+7
+2
+4
+3
- What is the oxidation number of chromium in K2Cr2O7
+6
+3
+5
+2
Which half-reaction correctly represents reduction?
S2– → S + 2e–
Mn7+ → Mn4+ + 3e–
Mn7+ + 3e– → Mn4+
S2– + 2e– → S
which element, if any, is oxidized?
What coefficient would Fe+2 have in the following standard redox reaction?
___ Al + ___ Fe+2 → ___ Al+3 + ___ Fe
1
2
3
6
Defined as the loss of electrons.
oxidation
reduction
redox
OIL RIG
WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:
Balance the following ACIDIC reactions using the half-reaction method.
MnO4−(aq) + H+(aq) + I− (aq) → Mn2+(aq) + I2(s)
Water is a product of this reaction. What is the coefficient of water in the final balanced equation?
8
5
2
16
what do you call a cow with no legs?
ground beef
Harry
Susie
short
