ÌâÄ¿ÄÚÈÝ
16£®ÔÚÈÜÒºÖÐÓÐŨ¶È¾ùΪ0.01mol•L-1µÄFe3+¡¢Cr3+¡¢Zn2+¡¢Mg2+µÈÀë×Ó£¬ÒÑÖª£º25¡æÊ±£¬Ksp[Fe£¨OH£©3]=4.0¡Á10-38£»Ksp[Cr£¨OH£©3]=7.0¡Á10-31£¬Ksp[Zn£¨OH£©2]=1.0¡Á10-17£»Ksp[Mg£¨OH£©2]=1.8¡Á10-11£®µ±ÆäÇâÑõ»¯Îï¸Õ¿ªÊ¼³Áµíʱ£¬ÏÂÁÐÄÄÒ»ÖÖÀë×ÓËùÐèµÄpH×îС£¨¡¡¡¡£©| A£® | Fe3+ | B£® | Cr3+ | C£® | Zn2+ | D£® | Mg2+ |
·ÖÎö ½áºÏc£¨OH-£©=$\root{3}{\frac{Ksp}{c£¨F{e}^{3+}£©}}$¡¢c£¨OH-£©=$\root{3}{\frac{Ksp}{c£¨C{r}^{3+}£©}}$¡¢c£¨OH-£©=$\sqrt{\frac{Ksp}{c£¨Z{n}^{2+}£©}}$¡¢c£¨OH-£©=$\sqrt{\frac{Ksp}{c£¨Mg{\;}^{2+}£©}}$¼ÆË㣬c£¨OH-£©Ô½Ð¡£¬³ÁµíÐèÒªµÄpHԽС£¬ÒÔ´ËÀ´½â´ð£®
½â´ð ½â£º25¡æÊ±£¬Ksp[Fe£¨OH£©3]=4.0¡Á10-38£»Ksp[Cr£¨OH£©3]=7.0¡Á10-31£¬Ksp[Zn£¨OH£©2]=1.0¡Á10-17£»Ksp[Mg£¨OH£©2]=1.8¡Á10-11£®
c£¨OH-£©=$\root{3}{\frac{Ksp}{c£¨F{e}^{3+}£©}}$=$\root{3}{\frac{4.0¡Á1{0}^{-38}}{0.01}}$¡Ö1.587¡Á10-12£»
c£¨OH-£©=$\root{3}{\frac{Ksp}{c£¨C{r}^{3+}£©}}$=$\root{3}{\frac{7.0¡Á1{0}^{-31}}{0.01}}$¡Ö8.8¡Á10-9£»
c£¨OH-£©=$\sqrt{\frac{Ksp}{c£¨Z{n}^{2+}£©}}$=$\sqrt{\frac{1.0¡Á1{0}^{-17}}{0.01}}$¡Ö3.2¡Á10-7£»
c£¨OH-£©=$\sqrt{\frac{Ksp}{c£¨Mg{\;}^{2+}£©}}$=$\sqrt{\frac{1.8¡Á1{0}^{-11}}{0.01}}$¡Ö4.24¡Á10-4£»
c£¨OH-£©Ô½Ð¡£¬³ÁµíÐèÒªµÄpHԽС£¬
¹ÊÑ¡A£®
µãÆÀ ±¾Ì⿼²éÄÑÈܵç½âÖʵļÆË㣬Ϊ¸ßƵ¿¼µã£¬°ÑÎÕÀë×ÓŨ¶ÈÓëKspµÄ¹ØÏµÎª½â´ðµÄ¹Ø¼ü£¬²àÖØ·ÖÎöÓë¼ÆËãÄÜÁ¦µÄ¿¼²é£¬×¢ÒâpHÓëÇâÑõ¸ùÀë×ÓŨ¶È¹ØÏµ£¬ÌâÄ¿ÄѶȲ»´ó£®
| A£® | t¡æÊ±£¬Ag2CrO4µÄKspΪ1¡Á10-8 | |
| B£® | ÔÚ±¥ºÍAg2CrO4ÈÜÒºÖмÓÈëK2CrO4ÄÜʹÈÜÒºÓÉYµã±äΪXµã | |
| C£® | t¡æÊ±£¬YµãºÍZµãʱAg2CrO4µÄKspÏàµÈ | |
| D£® | t¡æÊ±£¬½«0.01 mol•L-1 AgNO3ÈÜÒºµÎÈë20 mL 0.01 mol•L-1 KClºÍ0.01 mol•L-1 K2CrO4µÄ»ìºÏÈÜÒºÖУ¬CrO42-ÏȳÁµí |
£¨1£©¸Ã·´Ó¦µÄ»¯Ñ§·½³ÌʽΪ3X+Y?2Z£®
£¨2£©´Ó¿ªÊ¼ÖÁ2min£¬ZµÄƽ¾ù·´Ó¦ËÙÂÊΪ0.05mol•L-1•min-1£®
£¨3£©2minʱXµÄת»¯ÂÊΪ30%£®
£¨4£©ÏÂÁдëʩʹÕý·´Ó¦µÄËÙÂÊÈçºÎ±ä»¯£¿£¨Ìî¡°Ôö´ó¡±¡¢¡°¼õС¡±»ò¡°²»±ä¡±£©
| ±àºÅ | ¸Ä±äµÄÌõ¼þ | Õý·´Ó¦µÄËÙÂÊ |
| ¢Ù | ½µµÍÎÂ¶È | |
| ¢Ú | Ôö´óYµÄŨ¶È | |
| ¢Û | ʹÓúÏÊʵĴ߻¯¼Á | |
| ¢Ü | Ôö´óÈÝÆ÷Ìå»ý |
| A£® | Ñõ»¯Îï¡¢»¯ºÏÎï | B£® | »¯ºÏÎï¡¢µç½âÖÊ | ||
| C£® | ÈÜÒº¡¢½ºÌå | D£® | Öû»·´Ó¦¡¢Ñõ»¯»¹Ô·´Ó¦ |