Question

An aqueous solution of $1M \,NaCl$ and $1M \,HCl$ is:

• A. not a buffer but $pH < 7$
• B. not a buffer but $pH > 7$
• C. a buffer with $pH < 7$
• D. a buffer with $pH > 7$

Answer 1

Answer: (A)

not a buffer but $pH < 7$

Answer 2

$NaCl$ is salt of strong acid and strong base. Its not the case of buffer. $NaCl + H _{2} O \rightleftharpoons NaOH + HCl$ aqueous $NaCl$, itself exact neutral solution $HCl + H _{2} O \rightleftharpoons H _{3} O ^{+}+ Cl ^{-}$ makes solution acidic.