• 2022-05-29
    [tex=5.286x1.214]rKOGdt238tWpWuJ2O+e9aeZ3wMZKT7R2rWjp3HXGD3A=[/tex]某一元弱酸 (HA) 溶液 50 mL 与[tex=10.786x1.214]O8Q1s5UEYpcq3giehPNbA451yRyZq6XyTy9CyL6hPITp/Zx80UHeluQ3e1j6lQm+[/tex]溶液混合,将混合液稀释到100mL,用酸度计测得溶液的pH=5.25,求HA的[tex=1.571x1.429]TKEOhrv2rEoczYwfIp2tBQ==[/tex]。
  • 混合后,HA与NaOH发生反应,由于pH=5.25,HA有剩余,因此剩余的HA和产物[tex=1.357x1.143]lYk4eZbTgNE6QTVhQWRNXw==[/tex]构成了缓冲对。[tex=29.786x2.5]A/qpjhgWGU4gEan+H+kOPZcKMFXO1niygSktRU35As3l5IvWH5WKjGFEW7eq8BeVvxaOeecTdP1a6R96onoYIEqyfV1grq0HCdzVUvLZ0WV3EhmScSyd4hjbWt69eqg9G6Ym3lEyjRX+3WTa3vYn2Av7mYdXR0ErDcEW+8MFKAw=[/tex][tex=20.0x2.5]U5B79FwYw1RpceCFI6FVTtuiR6UheNXONUtau8/xgKxVj7xK7rP6GgzmMWwrpsYjiM+/8QwX7nNb5GGZhthiiyHTwCERLduQ5t3RZOk07ubPGnWdJtGZXBb5AOxI5isv[/tex][tex=10.643x2.786]R6zZOoLRDPCQvg9Ko20oqhkpJgBb6/wsuLEWIpe40t8jeiZ5NrgQN0X/DSgsN8fLmDhTrlf6EgpM0opUBmTuGAKJ6jmPKSf4ULBYqUJaZaw/ZO2p7ao43d+HEYEzn4EaKRAW6nJvcHfY7M3AlzfAgQ==[/tex][tex=17.5x5.857]rLLaRkPHAXW2IWjQiHO5iXRDLNGmxNyimGF2QhhroXNeP26joJPTutQcNO0g79SKGOCj91b94XZ1fa9J6ZlazxEjBBD4PErZ1vCnv7j25X60LVL9WlcIWhHB9YiEhz7jxOFLmA6h4BzxOut+e3j7pLNfveZxGQwM9sfsHVNT7ejdiE61Rlxi7a8PFI/7AfAhqJ3VmQiR0Qj5ZVEu+Tl98mQVo2P/G5cb43xIuX57XeOfblDxayqPGNl27UgDwjfhctRcZ+TRXOsgMWJCF/E5mg==[/tex]

    举一反三

    内容

    • 0

      0.1mol·L-1某一元弱酸(HA)溶液50mL与20mL0.1mol·L-1 NaOH溶液混合,将混合溶液稀释到100mL,用酸度计测得溶液的pH=5.25,求HA的KaӨ A: 1.62×10-4 B: 1.81×10-5 C: 3.72×10-6 D: 3.82×10-4

    • 1

      【计算题】5 ×8= 6×4= 7×7= 9×5= 2×3= 9 ×2= 8×9= 7×8= 5×5= 4×3= 5+8= 6 ×6= 3×7= 4×8= 9×3= 1 ×2= 9×9= 6×8= 8×0= 4×7=

    • 2

      将等体积pH=3的HCl溶液和pH=10的NaOH溶液混合后,溶液的pH区间是() A: 1~2 B: 3~4 C: 6~7 D: 8~9 E: 11~12

    • 3

      求函数$y = {{1 + \root 3 \of {{x^2}} - \sqrt {2x} } \over {\sqrt x }}$的导数$y' = $( ) A: $ {1 \over 2}{x^{ - {3 \over 2}}} + {1 \over 6}{x^{ - {5 \over 6}}}$ B: $ - {1 \over 2}{x^{ - {3 \over 2}}} + {1 \over 6}{x^{ - {5 \over 6}}}$ C: ${1 \over 2}{x^{ - {3 \over 2}}} - {1 \over 6}{x^{ - {5 \over 6}}}$ D: ${1 \over 3}{x^{ - {3 \over 2}}} - {1 \over 6}{x^{ - {5 \over 6}}}$

    • 4

      [tex=8.643x1.286]uBQiFE2SS8YpEELWC92XoAQlRW1zPtSkjlAMH5FPTWsMmjjxdRUrDouUULp9NPT1[/tex]的某一元弱酸与[tex=9.143x1.286]Qn+FMlkISUZ3NdoorKBymlU3pDvRrgZtgHOdpxD8S+8Sa0760iimEhbWu8eojEh0[/tex]NaOH溶液混合后,再稀释至[tex=3.143x1.286]5rhHRGNFrS9u1SZkhTWV6tKdvqMs7pcNCGmkRO196WA=[/tex],测得溶液的[tex=4.429x1.286]Cq8g2Hgn2jyKcCEnLFRQTA==[/tex],求该弱酸的解离常数。