Question

If 507 g FeCl2 were used up in the reaction FeCl2 + 2NaOH Fe(OH)2(s) + 2NaCl, how many grams of NaCl would be made?
A. 467.52 g NaCl
B. 1014 g NaCl
C. 233.76 g NaCl
D. 649.05 g NaCl

Answer 1

FeCl2 + 2NaOH -----> Fe(OH)2(s) + 2NaCl

507 g FeCl2
and question is asking for NaCl

find mole of FeCl2

Answer 2

Would it be B?

Answer 3

did u find the mole?

Answer 4

No

Answer 5

then do it
you will not find your answer if you don't do it

Answer 6

How do you find it?

Answer 7

mole= mass/ Molecular mass

Answer 8

126.7510

Answer 9

yeah thats molecular mass

Answer 10

now what?

Answer 11

now you are given mass in the question

Answer 12

so divide that mass by molecular mass

Answer 13

3.999 etc.

Answer 14

good now look at the ratio between FeCl2 and NaCl

Answer 15

aha

Answer 16

Now what?

Answer 17

so what is the ration?

Answer 18

ratio*

Answer 19

not sure

Answer 20

FeCl2 + 2NaOH -----> Fe(OH)2(s) + 2NaCl

do u see coefficient before NaCl?

Answer 21

its 2
and for FeCl2 its 1, you don't see it because we don't usually show 1

Answer 22

so ration is 1:2
1---- 3.999
2---- X

Answer 23

find X

Answer 24

7.999

Answer 25

good :)
now for NaCl you have mole and Molecular mass

Answer 26

then?

Answer 27

So would it be B?

Answer 28

no, look
mole= mass/Mr
mass= mole*Mr
mole = 7.999 and Mr= 58.5

Answer 29

@Abhisar for Mr of NaCl do i consider it as 2 of NaCl or 1 only?

Answer 30

Then it would be A?

Answer 31

im kinda between A and B
@sweetburger
lets just cross check

Answer 32

k

Answer 33

so yea A.

Answer 34

thanx :)))

Answer 35

Thank you both so much sorry for all the trouble Somy!

Answer 36

no problem :)) @zab505

Answer 37

1 mole of FeCl2 -------> 2 mole of NaCl
So, X mole of FeCl2 --------> 2*X mole of NaCl

Answer 38

Great work @Somy !
lv to see ur learning spirit @zab505 1

Answer 39

@Abhisar ♥

Answer 40

♥