Question

ÏÂÁÐÈÜÒºÖУ¬Á£×ÓµÄÎïÖʵÄÁ¿Å¨¶È¹ØϵÕýÈ·µÄÊÇ£¨¡¡¡¡£©

A£®0.1 mol/L Na₂CO₃ÈÜÒºÖУºc(OH-)=c(HCO3-)+c(H+)+c(H2CO3)

B£®0.1 mol/L £¨NH₄£©₂SO₄ÈÜÒºÖУºc(NH4+)=2c(SO42-)

C£®0.1 mol/L Na₂SÈÜÒºÖУºc£¨Na⁺£©+c£¨H⁺£©=2c£¨S^2-£©+c£¨HS^-£©+c£¨OH^-£©

D£®ÏòCH₃COONaÈÜÒºÖмÓÈëÊÊÁ¿µÄCH₃COOH£¬µÃµ½pH=4µÄ»ìºÏÈÜÒºÖУºc(Na+)£¾c(CH3COO-)£¾c(H+)£¾c(OH-)

Answer 1

·ÖÎö£ºA£®¸ù¾ÝÖÊ×ÓÊغãÅжϣ»
B£®£¨NH₄£©₂SO₄ÈÜҺˮ½â³ÊËáÐÔ£»
C£®¸ù¾ÝµçºÉÊéºãÅжϣ»
D£®µçºÉ²»Êغ㣮

½â´ð£º½â£ºA£®Na₂CO₃ÈÜÒºÖдæÔÚÖÊ×ÓÊغ㣬ӦΪ£ºc£¨OH^-£©=c£¨H⁺£©+c£¨HCO₃^-£©+2c£¨H₂CO₃£©£¬¹ÊA´íÎó£»
B£®£¨NH₄£©₂SO₄ÈÜҺˮ½â³ÊËáÐÔ£¬Ó¦Îª2c£¨SO₄^2-£©£¾c£¨NH₄⁺£©£¬¹ÊB´íÎó£»
C£®Na₂SÈÜÒº×ñÑ­µçºÉÊغ㣬Ϊc£¨Na⁺£©+c£¨H⁺£©=2c£¨S^2-£©+c£¨HS^-£©+c£¨OH^-£©£¬¹ÊCÕýÈ·£»
D£®ÏòCH₃COONaÈÜÒºÖмÓÈëÊÊÁ¿µÄCH₃COOH£¬µÃµ½pH=4µÄ»ìºÏÈÜÒº£¬ÈÜÒº³ÊËáÐÔ£¬Ó¦´æÔÚc£¨CH₃COO^-£©£¾c£¨Na⁺£©£¾c£¨H⁺£©£¾c£¨OH^-£©£¬¹ÊD´íÎó£®
¹ÊÑ¡D£®

µãÆÀ£º±¾Ì⿼²éÀë×ÓŨ¶È´óС±È½ÏÎÊÌ⣬ȫÃ濼²éѧÉú·ÖÎöÎÊÌâµÄÄÜÁ¦£¬ÌâÄ¿ÄѶÈÖеȣ¬±¾Ìâ×¢Òâ°ÑÎÕÈõµç½âÖʵĵçÀëºÍÑÎÀàË®½âµÄÌص㣬עÒâµçºÉÊغ㡢ÖÊ×ÓÊغãÒÔ¼°ÎïÁÏÊغãÔËÓã®