Question

Calculate the concentration of C2H5COOH that is needed to give a hydrogen ion concentration of
10–4 M?

Answer 1

Answer:given

Dissociation constant =1.8×10  

−6

 

lonc of acentic acid =0.1M

we know that,  

Degree of dissociation (α)=  

c

Ka

​  

 

​  

 & concentration of H  

+

ion =cα

Therefore, ion of H  

+

ion =c×  

c

Ka

​  

 

​  

 

⇒  

Ka×c

​  

 

⇒  

1.8×10  

−6

×0.1

​  

 

⇒  

1.8×10  

−7

 

​  

⇒  

18×10  

−8

 

​  

 

[H  

+

]⇒ 4.24×10  

−4

M

​

Explanation: