일단 네이버 지식인에 질문한건데요
여기에도 한번 여쭤봅니다. :D
http://kin.naver.com/qna/detail.nhn?d1id=11&dirId=1115&docId=134368833 <p>어떤 곳에서는 (주로 일반화학책)</p>
<p>H<sub>2</sub> A (aq) ⇄ H<sub>3</sub>O<sup>+</sup> + HA<sup>-</sup> (aq) </p>
<p>HA<sup>-</sup> ⇄ H<sub>3</sub>O<sup>+</sup> + A<sup>2-</sup> (aq) K<sub>a2</sub></p>
<p> </p>
<p>일 때 K<sub>a1</sub>>>K<sub>a2</sub> 이므로 [H<sup>+</sup>] 는 H<sub>2</sub> A (aq) ⇄ H<sub>3</sub>O<sup>+</sup> + HA<sup>-</sup> (aq) 반응에 의해 결정된다고 하고 계산을 하고</p>
<p>(그러니깐 첫번째 반응으로 [H<sup>+</sup>]를 구하고 이에 다른 화학종들의 농도를 맞춰나가는 식)</p>
<p> </p>
<p> </p>
<p>어떤 곳에서는 (주로 학원강의 들을 때)</p>
<p> </p>
<p><strong><font color="#3A32C3">NaHCO</font><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">는 물에 녹아 HCO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>-</sup></span> <font color="#3A32C3"></font><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">이온과 Na</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>+</sup></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">이온으로 완전히 나누인다. HCO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>-</sup></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">이온은 그 중 일부분이 다음과 같은 두 가지 가수 분해 반응을 한다.</span></strong></p>
<p style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; TEXT-INDENT: 27px; MARGIN: 0px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 14px"><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><br>
</span></p>
<p style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; TEXT-INDENT: 27px; MARGIN: 0px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 14px"><strong><font color="#3A32C3"><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"> HCO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">+ H</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>2</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">O = H</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">O</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>+</sup></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">+ CO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>2-</sup></span></font></strong></p>
<p style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; TEXT-INDENT: 27px; MARGIN: 0px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 14px"><strong><font color="#3A32C3"><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"> HCO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>-</sup></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">+ H</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>2</sub></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">= H</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>2</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">CO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">+ OH</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>-</sup></span></font></strong></p>
<p style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; TEXT-INDENT: 27px; MARGIN: 0px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 14px"><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><br>
</span></p>
<p style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; TEXT-INDENT: 27px; MARGIN: 0px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 14px"><font color="#3A32C3"><strong><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"> 이들 반응은 각각 가역 반응으로서 평형 상태에 있다. </span></strong></font></p>
<p style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; TEXT-INDENT: 27px; MARGIN: 0px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 14px"><font color="#3A32C3"><strong><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"> 또 생겨난 H</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">O</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>+</sup></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">와 OH</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>-</sup></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">이온들은 H</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">O</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>+</sup></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">+ OH</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>-</sup></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">= 2H</span></strong><span><strong><sub>2</sub>O의 반응으로 거의 완전히 없어진다. 그러므로 위 두 반응이</strong> 오른쪽으로 진행되는 정도는 거의 같고, 따라서 묽은 NaHCO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">용액 중에서 CO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sup>2-</sup></span></font> <font color="#3A32C3"><strong><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">농도와 H</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>2</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">CO</span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><sub>3</sub></span><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">의</span> <span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px">농도는 같아진다.</span></strong></font></p>
<p><span style="TEXT-ALIGN: justify; LINE-HEIGHT: 22px; FONT-FAMILY: '한양신명조'; COLOR: #000000; FONT-SIZE: 13px"><strong><font color="#3A32C3"></font></strong></span> </p>
<p> </p>
<p>요런 식으로 생각해서</p>
<img src="http://kinimage.naver.net/storage/upload/2011/07/28/2605493_1311768084.jpg">
<img src="http://kinimage.naver.net/storage/upload/2011/07/40/3944148_1311767929.jpg?type=w620">
<p>라고 생각하던데 어떤게 더 맞을까요?</p>
