• Support PF! Buy your school textbooks, materials and every day products Here!

One of the following undergoes a reaction

  • #1

Homework Statement



One of the two pairs of reactants will undergo a reaction. Which one, and what are the products?

Co(OH)2 (s) + NaOH (aq) ---->

Al(OH)3 (s) + NaOH (aq) ----->

Homework Equations



N/a

The Attempt at a Solution



I thought it might have something to do with the reactivity series, but I'm not sure how to proceed.
 

Answers and Replies

  • #2
Borek
Mentor
28,326
2,705
Amphoterism is a key word here.
 
  • #3
So one of the metal hydroxides can act as a base and an acid?
 
  • #4
Borek
Mentor
28,326
2,705
Yes.
 
  • #5
So is the reaction a neutralization reaction?
 
  • #6
Borek
Mentor
28,326
2,705
Can be treated this way. Check wiki article on aluminum hydroxide to find out products of the reaction.
 
  • #7
Okay, according to wikipedia, Al(OH)3 will form Al(OH)4-. So would the other product be Na+? Also, how do we know this reaction takes place and the one with Co(OH)2 doesn't?
 
  • #8
Borek
Mentor
28,326
2,705
So would the other product be Na+?
Yes.

Also, how do we know this reaction takes place and the one with Co(OH)2 doesn't?
You have to learn properties of the elements.
 
  • #9
So because Al is higher on the reactivity series than Co, the Al reaction will take place? Wait, but Na is higher than both of them. So they wouldn't be able to replace it anyway?
 

Related Threads for: One of the following undergoes a reaction

Replies
8
Views
820
Replies
2
Views
15K
Replies
2
Views
3K
Replies
5
Views
604
Replies
4
Views
637
Replies
8
Views
7K
Replies
1
Views
2K
Top