Bài 25: Kim loại kiềm và hợp chất quan trọng của kim loại kiềm
Hướng dẫn giải Bài 4 (Trang 111 SGK Hóa học 12)
<p>Trong c&aacute;c muối sau, muối n&agrave;o dễ bị nhiệt ph&acirc;n ?</p> <p>A. LiCl<span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span>B.&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><mi>a</mi><mi>N</mi><msub><mi>O</mi><mn>3</mn></msub></math><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span>C.&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>K</mi><mi>H</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub></math><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span>D. KBr</p> <p><span style="text-decoration: underline;"><strong>Hướng dẫn giải:</strong></span></p> <p>Chọn&nbsp; C .<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><mi>a</mi><mi>N</mi><msub><mi>O</mi><mrow><mn>3</mn><mo>&#160;</mo></mrow></msub><mi>v</mi><mi>&#224;</mi><mo>&#160;</mo><mi>K</mi><mi>H</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub></math> c&ugrave;ng bị nhiệt ph&acirc;n, tuy nhi&ecirc;n&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>K</mi><mi>H</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub></math> dễ bị nhiệt ph&acirc;n hơn (<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>K</mi><mi>H</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub></math> bị nhiệt ph&acirc;n ở nhiệt độ thấp hơn)</p> <p><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><math xmlns="http://www.w3.org/1998/Math/MathML"><mn>2</mn><mi>K</mi><mi>H</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub><mo>&#160;</mo><mover><mo>&#8594;</mo><msup><mi>t</mi><mn>0</mn></msup></mover><mo>&#160;</mo><msub><mi>K</mi><mn>2</mn></msub><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub><mo>&#160;</mo><mo>+</mo><mo>&#160;</mo><mi>C</mi><msub><mi>O</mi><mrow><mn>2</mn><mo>&#8593;</mo></mrow></msub><mo>&#160;</mo><mo>+</mo><mo>&#160;</mo><msub><mi>H</mi><mn>2</mn></msub><mi>O</mi></math></p>
Giải bài tập 4 ( trang 111, SGK Hóa học 12 )
GV: GV colearn
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Giải bài tập 4 ( trang 111, SGK Hóa học 12 )
GV: GV colearn