Question

Suppose a buffer solution is made from formic and (HCHO2) and sodium formate (NaCHO2). What is...

Suppose a buffer solution is made from formic and (HCHO2) and sodium formate (NaCHO2). What is the net ionic equation for the reaction that occurs when a small amount of hydrochloric acid is added to the buffer?

The answer is H3O+(aq) + CHO2–(aq) ----> HCHO2(aq) + H2O(l)

Could you should everthing step by step please?

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Homework Answers

Answer #1

solution contain HCHO2 (weak acid) and NaCHO2 (conjugate base.)

when we add HCl (strong acid.) it dissociate completely. as it is acid base part from buffer reacts with HCl

HCl + H2O --------------> H3O+ + Cl+

H3O+  ion reacts with NaCHO2

Na+(aq) + CHO2-(aq) + H3O+(aq)+ Cl-(aq) -----------> HCHO2(aq) + Na+(aq) + Cl-(aq) + H2O(l)

total CHO2-  reacts with H3O+   so no CHO2-   in reaction.

Na+ and Cl-  present both side so cancle each other.

CHO2-(aq) + H3O+(aq) --------------> HCHO2(aq) + H2O(l)  net ionic equation.

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