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Which pair of compounds will form a buffer in aqueous solution?
HCN and NaCN
HCl and NaOH
NaCN and NaOH
HCI and NaCl
HCN and HCl
NaCN and KCN
♦ Relevant knowledgeA buffer system is used to control the pH of an aqueous solution in a certain narrow range.This is crucial to the efficiency of certain reactions that take place in an aqueous atmosphere along with a variety of various biochemical processes. It is essential to maintain the control even when tiny quantities of bases or acids that are strong are introduced. The type of buffer system to use is dependent on the pH range you want to control.
This problem can be solved by the following: A buffer is made by combining a weak acid with its salt of a stronger acid, or by combining a weak base with its salt of strong acid.
A buffer solution is a solution which resists pH changes when added to a strong base, or strong acid.
There are two types of buffer solutions:
1. Acidic buffer – This is formed from a weak acid and its strong base salt.
2. Basic buffer – This is a mixture of a weak acid and its salt.
HCN is a weak base, while NaCN is a salt.
HCl is a powerful acid, while NaOH is a strong base.
NaOH is a strong acid, while NaCN is a salt.
HCl is a strong acid, while HCN is a weak acid.
HCl is a powerful acid, while NaCl is a salt of a strong strong acid HCl or a strong base NaOH.
NaCN is a salt with a strong acid and weak base, while KCN is another salt with a weak acid.
Part A – Ans
HCN and NaCN act as buffers in the aqueous Solution.
In aqueous Solution, HCl and NaOH do not form buffers.
NaCN and NaOH will not create a buffer in an aqueous solution.
HCN and HCl don’t form a buffer when mixed with aqueous Solution.
In aqueous Solution, HCl or NaCl won’t form a buffer.
In aqueous Solution, NaCN and KCN do not form a buffer.