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Nội dung: <blockquote data-quote="proboyvip1995" data-source="post: 114314" data-attributes="member: 199863"><p>Bài giải ne`:</p><p></p><p>Mx/H<span style="font-family: 'georgia'">2</span> = 6,7 x 2 = 13,4</p><p></p><p>gọi X<span style="font-family: 'georgia'">2</span> là sp của X + Ni</p><p></p><p>Mx<span style="font-family: 'georgia'">2</span> = 16,75 x 2 = 33,5</p><p> <span style="font-size: 15px"></span></p><p><span style="font-size: 15px">_____pt:     <span style="font-family: 'georgia'">CnH2n+2-k  </span>+ k H<span style="font-family: 'georgia'">2</span> ---> </span><span style="font-family: 'georgia'"> <span style="font-size: 15px">CnH2n+2</span></span></p><p><span style="font-family: 'georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'georgia'"><span style="font-size: 15px">___________ 1 mol______k mol____1 mol</span></span></p><p><span style="font-family: 'georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'georgia'"><span style="font-size: 15px">___________a mol______ka mol____a mol</span></span></p><p><span style="font-family: 'georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'georgia'">[FONT=.vntime]<span style="font-family: 'times new roman'"><span style="font-size: 15px">Trong 1 mol hỗn hợp đầu có: a mol hidrocacbon;       b mol H</span><span style="font-family: 'georgia'"><span style="font-size: 15px">2</span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-size: 15px"></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-size: 15px">Ta có:     (<span style="font-family: 'times new roman'">12n + 2n + 2 - 2k)a + 2b = 13,4</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-size: 15px"><span style="font-family: 'times new roman'"></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-size: 15px"></span><span style="font-family: 'times new roman'"><span style="font-size: 15px">1 mol hỗn hợp đầu tham gia sau còn lại x mol </span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px"></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">.............13,4/x = 33,5 => x = 0,4 mol</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px"></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">(khối lượng trước và sau pư bằng nhau)</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px"></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px"></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">Số mol sau pư: a mol ankan;    b - ka mol H2.</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">ta có hệ pt:    a + b - ka = 0,4</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">....................a + b = 1</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">=> ka = 0,6</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">...........(14n + 2 - 2k)a + 2b = 13,4</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">.....<=> 14na + 2a - 2ka + 2b = 13,4</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">.....<=> 14na + 2(a+b) - 2k = 13,4                 (*)</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px"></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">Thay a + b = 1, ka = 0,6 vào pt (*) <=> 14na + 2 -1,2 = 13,4</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">=>  na = 0,9</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">......ka = 0,6</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">..........................=> n/k = 0,9/0,6 = 3/2</span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-size: 15px">vậy vs n = 3,    k = 2,            -> ctpt là  </span>  <span style="font-family: 'georgia'">C3H4 </span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"></span></span></span></span></span></p><p> <span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-size: 15px">bài đấy bạn nhìn kĩ vào nhé ko khó hỉu đâu!!!!!!!!!!</span></span></span></span></span></span></p><p><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"><span style="font-family: 'georgia'"><span style="font-family: 'times new roman'"></span></span></span></span></p><p>[/FONT]</p></blockquote><p></p>

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