Zinc and Acids

  • #1
Soaring Crane
469
0
Does zinc react with both acetic acid (CH3COOH) and phosphoric acid (H3PO4)? I can't figure out the chemical equations for them and am wondering if no reactions occur.

Thanks.
 

Answers and Replies

  • #2
Astronuc
Staff Emeritus
Science Advisor
20,986
5,037
Dropping a piece of Zn metal into an acid will cause the liberation of hydrogen.

The standard electrode (reduction) potential Eo of Zn, i.e.

Zn2+ + 2 e- --> Zn is -0.763 V

whereas the potential for hydrogen, the reference is 0.

2 H+ + 2 e- --> H2 ,

so zinc will be oxidized and H will be reduced, and the rate will be determined by the strength or concentration (pH) of the acid and the dissolution of the Zn.
 
  • #3
Soaring Crane
469
0
Since I'm on the subject of zinc, did I balance/write these chemical equations properly?

Zn + 2AgNO3 --> 2Ag + Zn(NO3)2 (zinc with silver nitrate)

Zn + Cu(NO3)2 --> Cu + Zn(NO3)2 (zinc with copper nitrate)

Thanks.
 
  • #4
Cesium
274
0
Looks fine.
 
  • #5
Soaring Crane
469
0
Are these chemical equations even remotely correct?

(zinc with acetic acid) Zn + 2CH3CO2H --> H2 + Zn(C2H3O2)2

(zinc with phosphoric acid) 3Zn + 2H3PO4 --> 3H2 + Zn3(PO4)2

Thanks.
 
  • #6
Soaring Crane
469
0
Any volunteers?

Thanks.
 
  • #7
Borek
Mentor
29,167
3,840
Looks OK, although I would write Zn(CH3CO2)2 to be consistent on both sides of equation.
 
Last edited:

Suggested for: Zinc and Acids

Replies
1
Views
867
Replies
9
Views
641
  • Last Post
2
Replies
45
Views
6K
Replies
1
Views
375
Replies
9
Views
211
  • Last Post
Replies
4
Views
684
Replies
3
Views
1K
  • Last Post
Replies
11
Views
2K
  • Last Post
Replies
2
Views
894
  • Last Post
Replies
2
Views
341
Top