question_answer

Why in Group V of qualitative analysis, sufficient \[N{{H}_{4}}OH\] solution should be added before adding\[{{(N{{H}_{4}})}_{2}}C{{O}_{3}}\] solution?

Answer:

                This is done to convert \[N{{H}_{4}}HC{{O}_{3}}\] usually present in large amounts along with \[{{(N{{H}_{4}})}_{2}}C{{O}_{3}}\] to \[{{(N{{H}_{4}})}_{2}}C{{O}_{3}}\] \[N{{H}_{4}}HC{{O}_{3}}\,+N{{H}_{4}}OH\xrightarrow{\,}\,{{(N{{H}_{4}})}_{2}}C{{O}_{3}}+{{H}_{2}}O\]