Which set of compounds would form a buffer in aqueous solution? Drag each item t

Question

Which set of compounds would form a buffer in aqueous solution? Drag each item to the appropriate bin. Reaction in a buffer solution When an acid or a base is added to a buffer, a double-displacement reaction will occur. The acid or base will be neutralized, forming a neutral salt or water plus the conjugate of the buffer. For example, if the base NaOH is added to a buffer containing HCN and NaCN, the base will react with the acid HCN as shown: NaOH (aq) + HCN(aq) rightarrow NaCN(aq) + H_2O(1) Complete the following chemical equations to show what happens when HBr or KOH is added to a buffer solution made from HF and KF Identify the reaction that occurs when the acid HBr is added to the buffer solution. Drag each label to the appropriate target. This content is not available on your mobile device, but your work is still incomplete. Please use a different device to submit your solution for grading. Identify the reaction that occurs when the base KOH is added to the buffer solution. Drag each label to the appropriate target. This content is not available on your mobile device, but your work is still incomplete. Please use a different device to submit your solution for grading.

Explanation / Answer

Part A:
The pairs which form buffer are:
HCN & KCN ; HBr & NaBr ; HCOOH & HCOOK

Rest all remaining pairs don't form buffers.

Part B:

No reaction occurs, since HBr is itself an acid and cannot react with the acid HF

Part C:
Following reaction occurs:
KOH + HF ---> KF + H2O

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