MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Concentration Terms

520 gm mixtur...

Question

520 gm mixture of ${F e}_{2} O_{3}$ and FeO reacts completely with 158 gm $K M n O_{4}$ in acidic medium. Calculate the mole % of ${F e}_{2} O_{3}$ in mixture.

Open in App

Solution

Only $F e O$ with $K M n O_{4}$
$5 F e^{2 -} + M n O_{4}^{-} \to M n^{2 +} + 5 F e^{3 +} + 4 H_{2} O + 8 H^{+}$
n of $K M n O_{4} = \frac{158}{158} = 1 m o l$
$∴ F e^{2 +} = 5 m o l$
$∴ F e O = 5 m o l$
Mass $= 72 \times 5$
$= 360 g$
Mass of $F e_{2} O_{3} = 160 g$
Mole = $\frac{160}{160} = 1 m o l e$
$∴$ mol % = $\frac{1}{6} \times 100 = \frac{50}{3}$ %

Suggest Corrections

thumbs-up

0

Similar questions

Q. 2.32 g mixture of

F e O

F e_{2} O_{3}

is burnt in the atmosphere of oxygen. 56 ml of

O_{2}

is required at STP for complete oxidation. Mole percentage of

F e_{2} O_{3}

in the given mixture is:

Q. A mixture of

F e O

F e_{2} O_{3}

is completely reacted with

100 m L

0.25 M

K M n O_{4}

solution. The resultant solution was then titrated with

Z n

dust which converted

F e^{3 +}

of the solution to

F e^{2 +}

F e^{2 +}

1000 m L

0.10 M

K_{2} C r_{2} O_{7}

solution. Find out the weight

% F e_{2} O_{3}

in the mixture.

Q. From the following data at 25C, Calculate the standard enthalpy of formation of FeO(s) and of

{F e}_{2} O_{3} (s)

.

	Reaction	$Δ_{r} H (K J / m o l e)$
(1)	${F e}_{2} O_{3} (s) + 3 C (g r a p h i t e) \to 2 F e (s) + C O (g)$	492
(2)	$F e O (s) + C (g r a p h i t e) \to F e (s) + C O (g)$	155
(3)	$C (g r a p h i t e) + O_{2} (g) \to C O_{2} (g)$	-393
(4)	$C O (g) + 1 / 2 O_{2} (g) \to C O_{2} (g)$	-282

F e O

2

V O

5.75

{F e}_{2} O_{3}

is (as nearest integer) :

V O + {F e}_{2} O_{3} \to F e O + V_{2} O_{5}

Q. Mole ratio of

F e

F e O

{F e}_{2} O_{3}

{F e}_{3} O_{4}

samples of equal mass is:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Concentration Terms

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Concentration Terms

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon