Academic Subjects
➤
Chemistry
➤
General Chemistry
➤
Chemical Reactions
➤
H
2
O
2
To H
2
O
Hydrogen peroxide, H
2
O
2
reacts with manganate (VII) ions, MnO
4
-
, in basic solution according to the following equation
2 MnO
4
-
(aq)
+ 3 H
2
O
2(aq)
⇒
2 MnO
2(g)
+ 3 O
2(g)
+ 2 OH
-
(aq)
+ 2 H
2
O
(l)
How many moles of hydrogen peroxide would be needed to produce eight moles of water?
A. One
B. Two
C. Three
D. Twelve
We already have our balanced equation, so let's do a mole to mole ratio to find our answer
8
moles H
2
O
(3 moles H
2
O
2
)
/
(2
moles H
2
O
)
= 12 moles H
2
O
2
The correct answer is option D