ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿¢ÙÒÑÖªt¡æʱAgClµÄKsp£½2¡Á10£10£»¢ÚÔÚt¡æʱAg2CrO4ÔÚË®ÖеijÁµíÈܽâƽºâÇúÏßÈçͼËùʾ¡£ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨ £©
A.ÔÚt¡æʱ£¬Ag2CrO4µÄKspΪ1¡Á10£9
B.ÔÚ±¥ºÍAg2CrO4ÈÜÒºÖмÓÈëK2CrO4¿ÉʹÈÜÒºÓÉYµãµ½Xµã
C.ÔÚt¡æʱ£¬ÒÔ0.01 mol/LAgNO3ÈÜÒºµÎ¶¨20 mL 0.01 mol/L KClºÍ0.01 mol/LµÄK2CrO4µÄ»ìºÍÈÜÒº£¬CrO42£ÏȳÁµí
D.ÔÚt¡æʱ£¬·´Ó¦Ag2CrO4(s)£«2Cl£(aq) 2AgCl(s)£«CrO42£(aq)µÄƽºâ³£ÊýK£½2.5¡Á107
¡¾´ð°¸¡¿D
¡¾½âÎö¡¿
A.ÒÀ¾ÝͼÏóÇúÏßÉϵÄÊý¾Ý£¬½áºÏÈܶȻý³£Êý¸ÅÄî¼ÆËãµÃµ½;ÇúÏß.ÉϵĵãÊdzÁµíÈܽâƽºâ£¬Ag2CrO4µÄ³ÁµíÈܼÁƽºâΪ:Ag2 CrO4(s) = 2Ag+ CrO4- ;Ksp= c2(Ag+)c(CrO42-)=)2
= 10 -12£¬¹ÊA´íÎó;
B.ÔÚ±¥ºÍÈÜÒºÖмÓÈëK2CrO4¿Éʹ³ÁµíÈܽâƽºâ×óÒÆ£¬ÈÜ»ý³£Êý²»±ä£¬»¹ÊDZ¥ºÍÈÜÒº£¬¶ÔÓ¦µÄµã»¹Ó¦ÔÚÇúÏßÉÏ£¬¹ÊB´íÎó;
C.ÒÀ¾ÝÈܶȻý³£Êý¼ÆË㣺Ksp(CrO42- )= c2(Ag+)c(CrO42-)=110-12£¬ÒÔ0.01mol/LAgNO3ÈÜÒºµÎ¶¨20mL0.01 mol/LKClºÍ0.01mol/LµÄK2CrO4µÄ»ìºÏÈÜÒºÖУ¬c(CrO42-)= 0.01mol/L,µÃµ½
c(Ag+)==110-5mol/ L;0.01mol/LKClÈÜÒºÖУ¬c(Cl- )= 0.01mol/L ;ÒÀ¾ÝÈܶȻý¼ÆËãµÃµ½: c(Ag+)==2 10- 8mol/L; ËùÒÔÏÈÎö³öÂÈ»¯Òø³Áµí£¬¹ÊC´íÎó;
D.ÔÚt¡ãCʱ, Ag2 CrO4(s) + 2Cl- (aq) = 2AgCl(s) + CrO42- (aq)£¬Àë×ÓŨ¶ÈÏàͬʱÂÈ»¯ÒøµÄÈܶȻýºÍAg2 CrO4µÄÈܶȻý¼ÆËãK=c(CrO42-)/c2(Cl-)=Ksp(Ag2CrO4)/Ksp2(AgCl)==2.5107£¬¹ÊDÕýÈ·;
ËùÒԴ𰸣ºD¡£