The reactions which happen in an aqueous solution of carbon dioxide include:

CO 2 (g) ⇄ CO 2 (aq)
CO 2 (aq) + H 2 O(l) ⇄ H 2 CO 3 (aq)
H 2 CO 3 (aq) ⇄ HCO 3 - (aq) + H + (aq)
Which one of the following statements best describes the effect of adding hydroxide (OH - (aq)) on the solubility of CO 2 (g) in water?

Question

The reactions which happen in an aqueous solution of carbon dioxide include: 
  
 CO 2 (g) ⇄ CO 2 (aq) 
 CO 2 (aq) + H 2 O(l) ⇄ H 2 CO 3 (aq) 
 H 2 CO 3 (aq) ⇄ HCO 3 - (aq) + H + (aq) 
 Which one of the following statements best describes the effect of adding hydroxide (OH - (aq)) on the solubility of CO 2 (g) in water?

Answer

OH -  is not involved in these reactions so it will have no effect on the solubility of CO 2  in water

Answer

the OH -  will react with the H +  to form water causing less H 2 CO 3  to dissociate, increasing the amount of H 2 CO 3  which causes less CO 2 (g) to dissolve.

Answer

the OH -  will react with the H +  to form water and more H 2 CO 3  will dissociate, reducing the amount of H 2 CO 3  which then reduces the amount of CO 2 (aq), causing more CO 2 (g) to dissolve.

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The reactions which happen in an aqueous solution of carbon dioxide include: ...

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