Home Library Explore SAT

Home Library Explore SAT

redox Flashcards | StudBud

redox

10 terms·StudBud Administration·502 plays

oxidation reduction honors chemistry

Flashcards10 cardsFPractice quizPHost liveL

Questions 10

Answers

1
Which atom is reduced? K₂Cr₂O₇ + S → KOH + Cr₂O₃ + SO₂
K
O
S
Cr
2
If zinc is less reactive than magnesium....
magnesium can replace zinc ions to form zinc compounds
magnesium is lower than zinc in the activity series
chemistry
zinc can replace magnesium ions to form magnesium compounds
3
reduction is
a loss of electrons
both a and C
a gain of oxygen
a gain of electrons
4
the oxidation number of sulfur in each of the following is +6 EXCEPT for
Na2SO4
SO42-
S2O32-
SO3
5
Oxidation is
removal of oxygen
a decrease in oxidation number
an increase in oxidation number
a gain of electrons
6
An element that is oxidized
always gives up electrons
can be oxygen gas
is an acid
can act as a bleach
7
In a combination reaction
elements are oxidized
elements are reduced
no change occurs
an element is oxidized while another is reduced
8
identify the oxidation half reaction
O2 + 4H+ + 4e- → 2H2O
Fe3+ + e- → Fe2+
Cl2 + 2e- → 2Cl-
Fe2+ → Fe3+ + e-
9
Determine what happens in this reaction: S + Cl₂ → SCl₂
chlorine is reduced
chlorine is oxidized
sulfur is the oxidizing agent
sulfur is reduced
10
The oxidation state of sodium in an ionic compound is
+2
-1
0
+1