Bài 23: Bài luyện tập 4
Hướng dẫn giải Bài 4 (Trang 79 SGK Hóa học lớp 8)
<p>C&oacute; phương tr&igrave;nh h&oacute;a học sau:</p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>C</mi><mi>a</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>+</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mn>2</mn><mi>H</mi><mi>C</mi><mi>l</mi><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#8594;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mi>C</mi><mi>a</mi><mi>C</mi><msub><mi>l</mi><mn>2</mn></msub><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>+</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mi>C</mi><msub><mi>O</mi><mn>2</mn></msub><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>+</mo><mo>&#160;</mo><msub><mi>H</mi><mn>2</mn></msub><mi>O</mi></math></p> <p>canxi cacbonat&nbsp; &nbsp;axit clohidric&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; canxi clorua&nbsp; &nbsp; &nbsp; kh&iacute; cacbonic&nbsp; &nbsp; nước</p> <p>a) T&iacute;nh khối lượng canxi clorua thu được khi cho 10g canxi cacbonat t&aacute;c dụng với axit clohidric dư.</p> <p>b) T&iacute;nh thể t&iacute;ch kh&iacute; cacbonic thu được trong ph&ograve;ng khi l&agrave;m th&iacute; nghiệm, nếu c&oacute; 5g canxi cacbonat t&aacute;c dụng hết với axit. Biết 1 mol kh&iacute; ở điều kiện ph&ograve;ng c&oacute; thể t&iacute;ch l&agrave; 24 l&iacute;t.</p> <p><strong>Giải:</strong></p> <p>a)&nbsp; <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>C</mi><mi>a</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub><mo>+</mo><mn>2</mn><mi>H</mi><mi>C</mi><mi>l</mi><mo>&#160;</mo><mo>&#160;</mo><mo>-</mo><mo>-</mo><mo>-</mo><mo>-</mo><mo>-</mo><mo>&#62;</mo><mi>C</mi><mi>a</mi><mi>C</mi><msub><mi>l</mi><mn>2</mn></msub><mo>&#160;</mo><mo>+</mo><mo>&#160;</mo><mi>C</mi><msub><mi>O</mi><mn>2</mn></msub><mo>&#8593;</mo><mo>+</mo><msub><mi>H</mi><mn>2</mn></msub><mi>O</mi><mspace linebreak="newline"/><mn>1</mn><mo>&#160;</mo><mi>m</mi><mi>o</mi><mi>l</mi><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mn>1</mn><mo>&#160;</mo><mi>m</mi><mi>o</mi><mi>l</mi><mspace linebreak="newline"/><mn>0</mn><mo>,</mo><mn>1</mn><mo>&#160;</mo><mi>m</mi><mi>o</mi><mi>l</mi><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mn>0</mn><mo>,</mo><mn>1</mn><mo>&#160;</mo><mi>m</mi><mi>o</mi><mi>l</mi><mspace linebreak="newline"/><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><msub><mi>n</mi><mrow><mi>C</mi><mi>a</mi><mi>C</mi><msub><mi>O</mi><mn>3</mn></msub></mrow></msub><mo>=</mo><mfrac><mn>10</mn><mn>100</mn></mfrac><mo>=</mo><mn>0</mn><mo>,</mo><mn>1</mn><mo>&#160;</mo><mi>m</mi><mi>o</mi><mi>l</mi><mo>;</mo><mspace linebreak="newline"/><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><mo>&#160;</mo><msub><mi>m</mi><mrow><mi>C</mi><mi>a</mi><mi>C</mi><msub><mi>l</mi><mn>2</mn></msub></mrow></msub><mo>=</mo><mn>0</mn><mo>,</mo><mn>1</mn><mo>.</mo><mn>111</mn><mo>=</mo><mn>11</mn><mo>,</mo><mn>1</mn><mi>g</mi><mo>.</mo></math></p> <p>b) .<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>V</mi><mrow><mi>C</mi><msub><mi>O</mi><mn>2</mn></msub></mrow></msub><mo>=</mo><mn>1</mn><mo>,</mo><mn>2</mn><mo>&#160;</mo><mfenced><mi>l</mi></mfenced></math></p>
Giải bài tập 4 (trang 79 SGK Hóa học 8)
GV: GV colearn
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Giải bài tập 4 (trang 79 SGK Hóa học 8)
GV: GV colearn