GChem Question

[tom_servo_dds]

found this one on Topscore that I don't understand the answer to.

Q: What are the products of the balanced equation when iron (III) oxide reacts with magnesium chloride?

A:
A) FeCl3, Mg2O
B) FeCl2, MgO
C) FeCl3, MgO
D) Fe2Cl3, MgO
E) Fe3Cl2, Mg2O

Answer key says that it's C because "Fe2O3 + MgCl2 ==> FeCl3 MgO"

However, this isn't a balanced equation as the problem asks for. Anyone have any thoughts? I've been studying for about 14 hours today so maybe I'm just going cross-eyed again. Thanks in advance!

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[dat_student]

found this one on Topscore that I don't understand the answer to.

Q: What are the products of the balanced equation when iron (III) oxide reacts with magnesium chloride?

A:
A) FeCl3, Mg2O
B) FeCl2, MgO
C) FeCl3, MgO
D) Fe2Cl3, MgO
E) Fe3Cl2, Mg2O

Answer key says that it's C because "Fe2O3 + MgCl2 ==> FeCl3 MgO"

However, this isn't a balanced equation as the problem asks for. Anyone have any thoughts? I've been studying for about 14 hours today so maybe I'm just going cross-eyed again. Thanks in advance!

The problem says "Iron (iii)" so the right answer is either A or C

A) FeCl3, Mg2O
C) FeCl3, MgO

MgCl2 tells me the valence of Mg = 2 & we know the valence of O = 2
so MgO is the right answer. [Mg2O means Oxygen has a valence of 4 << WRONG]

Thus, C is the only right answer.

 

[slayerdeus]

found this one on Topscore that I don't understand the answer to.

Q: What are the products of the balanced equation when iron (III) oxide reacts with magnesium chloride?

A:
A) FeCl3, Mg2O
B) FeCl2, MgO
C) FeCl3, MgO
D) Fe2Cl3, MgO
E) Fe3Cl2, Mg2O

Answer key says that it's C because "Fe2O3 + MgCl2 ==> FeCl3 MgO"

However, this isn't a balanced equation as the problem asks for. Anyone have any thoughts? I've been studying for about 14 hours today so maybe I'm just going cross-eyed again. Thanks in advance!

Don't confuse yourself man, stay focused. The question is not asking for the balanced equation, only which products are formed. Goodluck.

 

[tom_servo_dds]

Don't confuse yourself man, stay focused. The question is not asking for the balanced equation, only which products are formed. Goodluck.

Great, thanks for the answer you two - that makes sense now. Best of luck to both of you too!