Which of the following can be added to dissolve the precipitate formed in the reaction represented by the following equation? CaCl_2(aq) + H₂C₂O _4(s) ⇌ CaC ₂O₂

Micheal_Akinyeke

3 years ago

me sef dey wonder how this matter take concern ammonia

abdulsalam.saliu

4 years ago

Please Myschool i need an explanation?

geord

5 years ago

B is very correct

Lamlad chemistry
Question 22

Brightonexcellent

1 year ago

The correct answer is:

D. Ethanedioic acid

Explanation:

The reaction in the question forms calcium oxalate, which is a slightly soluble salt. To dissolve the precipitate, you need to shift the equilibrium to the right. Adding ethanedioic acid increases the concentration of oxalate ions( C2O4-), which promotes the dissolution of the precipitate through a common ion effect.

Why not the other options?

A. Calcium chloride solution: Adding more calcium ions would shift the equilibrium toward more precipitate formation.

B. Concentrated hydrochloric acid: HCl may not directly dissolve the precipitate, and it could disrupt the equilibrium in an unpredictable way.

C. Ethanol: Ethanol is nonpolar and does not affect the equilibrium of a salt in aqueous solution.

E. Aqueous ammonia: Ammonia does not react with calcium oxalate or shift this equilibrium effectively.

abdullahistricker

4 years ago

The answer is B
WE NEED FULL EXPLANATION

red_kwatwa

2 months ago

The answer is really B. Calcuim oxolate, the precipitate formed dissolves in ammonia buh not in any of the other options mentioned