Question

10£®ÏÂÁи÷ÈÜÒºÖУ¬Î¢Á£µÄÎïÖʵÄÁ¿Å¨¶È¹ØϵÕýÈ·µÄÊÇ£¨¡¡¡¡£©

• A£® 1.0mol/L µÄNa₂CO₃ÈÜÒºÖУºc£¨H⁺£©+c£¨Na⁺£©=c£¨HCO₃^-£©+c£¨CO₃^2-£©+c£¨OH^-£©
• B£® 1.0mol/LNH₄ClÈÜÒº£ºc£¨NH₄⁺£©=c£¨Cl^-£©
• C£® Ïò´×ËáÄÆÈÜÒºÖмÓÈëÊÊÁ¿´×ËᣬµÃµ½µÄËáÐÔ»ìºÏÈÜÒº£ºc£¨Na⁺£©£¾c£¨CH₃COO^-£©£¾c£¨H⁺£©£¾c£¨OH^-£©
• D£® ÏòÏõËáÄÆÈÜÒºÖеμÓÏ¡ÑÎËáµÃµ½µÄpH=5µÄ»ìºÏÈÜÒº£ºc£¨Na⁺£©=c£¨NO₃^-£©

Answer 1

·ÖÎö A¡¢ÒÀ¾Ý̼ËáÄÆÈÜÒºÖеçºÉÊغã·ÖÎöÅжϣ»
B¡¢ÂÈ»¯ï§ÈÜÒºÖÐ笠ùÀë×ÓË®½â£»
C¡¢Ïò´×ËáÄÆÈÜÒºÖмÓÈëÊÊÁ¿´×ËᣬµÃµ½µÄËáÐÔ»ìºÏÈÜÒº£¬´×ËáµçÀë´óÓÚ´×Ëá¸ùÀë×ÓË®½â£»
D¡¢pH=5µÄ»ìºÏÈÜÒº£¬ÄÆÀë×Ó¡¢ÏõËá¸ùÀë×Ó²»µçÀë¡¢²»Ë®½â£®

½â´ð ½â£ºA.0.1 mol/L Na₂CO₃ÈÜÒºÖУ¬ÓÉÖÊ×ÓÊغã¿ÉÖªc£¨OH^-£©=c£¨HCO₃^-£©+c£¨H⁺£©+2c£¨H₂CO₃£©£¬¹ÊA´íÎó£»
B.0.1 mol/L NH₄ClÈÜÒº£¬ï§¸ùÀë×ÓË®½âÔòc£¨NH₄⁺ £©£¼c£¨Cl^-£©£¬¹ÊB´íÎó£»
C£®Ïò´×ËáÄÆÈÜÒºÖмÓÈëÊÊÁ¿´×ËᣬµÃµ½µÄËáÐÔ»ìºÏÈÜÒºÖÐc£¨H⁺£©£¾c£¨OH^-£©£¬ÓɵçºÉÊغã¿ÉÖªc£¨Na⁺£©£¼c£¨CH₃COO^-£©£¬¹ÊC´íÎó£»
D£®ÏòÏõËáÄÆÈÜÒºÖеμÓÏ¡ÑÎËáµÃµ½µÄpH=5µÄ»ìºÏÈÜÒºÖÐc£¨Na⁺£©=c£¨NO₃^-£©£¬¹ÊDÕýÈ·£»
¹ÊÑ¡D£®

µãÆÀ ±¾Ì⿼²éÀë×ÓŨ¶È´óСµÄ±È½Ï£¬Ã÷È·ÑÎÀàË®½âµÄÓ¦Óü°ÖÊ×ÓÊغ㡢µçºÉÊغ㼴¿É½â´ð£¬×¢ÒâÑ¡ÏîDΪÒ×´íµã£¬ÌâÄ¿ÄѶȲ»´ó£®