Question

ÏÂÁÐÐðÊöÖУ¬²»ÕýÈ·µÄÊÇ

1. A.
   c£¨NH₄⁺£©ÏàµÈµÄ£¨NH₄£©₂SO₄¡¢£¨NH₄£©₂Fe£¨SO₄£©₂ºÍNH₄ClÈÜÒºÖУ¬ÈÜÖÊŨ¶È´óС¹ØϵÊÇ£ºc[£¨NH₄£©₂Fe£¨SO₄£©₂] £¼ c[£¨NH₄£©₂SO₄] £¼ c£¨NH₄Cl£©
2. B.
   10 mL 0£®10 mol¡¤L^¨D1 CH₃COOHÈÜÒº¼ÓÈëµÈÎïÖʵÄÁ¿µÄNaOHºó£¬ÈÜÒºÖÐÓÐc£¨Na⁺£©=c£¨CH₃COO^-£©£¾c£¨OH^-£©=c£¨H⁺£©
3. C.
   Á½ÖÖ´×ËáÈÜÒºµÄÎïÖʵÄÁ¿Å¨¶È·Ö±ðΪc₁ºÍc₂£¬pH·Ö±ðΪaºÍ£¨a+1£©£¬ÔòÓÐc₁£½10c₂
4. D.
   NaHCO₃ÈÜÒºÖУºc£¨H⁺£© + c£¨H₂CO₃£©£½c£¨CO₃^2-£© + c£¨OH^-£©

Answer 1

BC

ADÕýÈ·
B£®²»ÕýÈ·£¬10 mL 0£®10 mol¡¤L^¨D1 CH₃COOHÈÜÒº¼ÓÈëµÈÎïÖʵÄÁ¿µÄNaOHºó£¬ÈÜÒºÖÐÓÐ
c£¨Na⁺£©£¾c£¨CH₃COO^£­£©£¾c£¨OH^£­£©£¾c£¨H⁺£©
C£®²»ÕýÈ·£¬Á½ÖÖ´×ËáÈÜÒºµÄÎïÖʵÄÁ¿Å¨¶È·Ö±ðΪc₁ºÍc₂£¬pH·Ö±ðΪaºÍ£¨a£«1£©£¬ÔòÓÐc₁<10c₂