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General Chemistry

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Ranking pH of Buffers with Varying Amounts of $\textrm{HCN/NaCN}$

CHEM-A$J1JN

Consider the solutions below:

Solution A: $4.61 \textrm{ g HCN}$ in $250 \textrm{ mL}$ of water

Solution B: $2.16 \textrm{ g HCN}$ and $5.20 \textrm{ g NaCN}$ in $250 \textrm{ mL}$ of water

Solution C: $3.57 \textrm{ g HCN}$ and $1.19 \textrm{ g NaCN}$ in $250 \textrm{ mL}$ of water

Solution D: $5.31 \textrm{ g NaCN}$ in $250 \textrm{ mL}$ of water

Solution E: $2.94 \textrm{ g HCN}$ and $3.83 \textrm{ g NaCN}$ in $250 \textrm{ mL}$ of water

Rank the following solutions in order of increasing pH.

A

A $<$ C $<$ E $<$ B $<$ D

B

B $<$ E $<$ C $<$ A $<$ D

C

D $<$ A $<$ C $<$ E $<$ B

D

D $<$ B $<$ E $<$ C $<$ A

E

None of the above.