ÌâÄ¿ÄÚÈÝ
9£®Ä³ÐËȤС×éÓÃÈÜÖÊÖÊÁ¿·ÖÊýΪ 19.6%µÄÏ¡ÁòËáÀ´´¦Àí 10.22 ¿Ëº¬ÓÐ̼ËáÄÆºÍÇâÑõ»¯ÄƵĻìºÏ·ÏÒº£®ËûÃÇÏò·ÏÒºÖмÓÈëÏ¡ÁòËáʱ£¬ËùµÃÈÜÒº pH Óë¼Ó ÈëµÄÏ¡ÁòËáÖÊÁ¿µÄ¹ØÏµÇúÏßÈçͼËùʾ£®µ±·ÏÒºÖеÄÈÜÖÊÇ¡ºÃ·´Ó¦Íêȫʱ£¬ÈÜÒº×ÜÖÊÁ¿Îª20 ¿Ë£®£¨1£©µ±·´Ó¦½øÐÐÖÁͼÖÐ P µãʱ£¬ÈÜÒºÖеÄÈÜÖÊÓÐNa2SO4£®£¨Ìîд»¯Ñ§Ê½£©
£¨2£©Õû¸ö¹ý³Ì¹²Éú³ÉµÄ¶þÑõ»¯Ì¼ÖÊÁ¿Îª0.22g¿Ë£®
£¨3£©Í¨¹ý¼ÆËãÈ·¶¨Í¼ÖÐmµÄÖµ£®
·ÖÎö £¨1£©¸ù¾ÝͼÏó·ÖÎöÔÚPʱ£¬ÈÜÒºµÄpHµÈÓÚ7£¬ÈÜÒº³ÊÖÐÐÔ£¬·ÏҺǡºÃ´¦ÀíÍꣻ
£¨2£©¸ù¾ÝÖÊÁ¿Êغ㶨ÂɼÆËã¶þÑõ»¯Ì¼µÄÖÊÁ¿£»
£¨3£©¸ù¾Ý¶þÑõ»¯Ì¼µÄÖÊÁ¿ÒÔ¼°Ì¼ËáÄÆÁòËá·´Ó¦µÄ·½³Ìʽ£¬¼ÆËãÓë̼ËáÄÆ·´Ó¦µÄÁòËáµÄÖÊÁ¿£¬½øÒ»²½¼ÆËãmµÄÖµ£®
½â´ð ½â£º£¨1£©ÓÉÓÚÉú³ÉµÄÁòËáÄÆÈÜÒºÏÔÖÐÐÔ£¬ÓÉͼʾ¿ÉÖª£¬µ±·´Ó¦½øÐÐÖÁͼÖÐPµãʱ£¬pH=7£¬È»ºóÓÖϽµ£¬ËµÃ÷´ËʱǡºÃ½«·ÏÒº´¦ÀíÍꣻÇâÑõ»¯ÄÆÓëÁòËá·´Ó¦Éú³ÉÁòËáÄÆºÍË®£¬Ì¼ËáÄÆºÍÁòËáÉú³ÉÁòËáÄÆ¡¢Ë®ºÍ¶þÑõ»¯Ì¼£¬ËùÒÔÈÜÒºÖеÄÈÜÖÊÓÐNa2SO4£»¹ÊÌNa2SO4£»
£¨2£©Éú³ÉµÄ¶þÑõ»¯Ì¼ÖÊÁ¿Îª10.22g+10g-20g=0.22g£®¹ÊÌ0.22£»
£¨3£©ÉèÓë̼ËáÄÆ·´Ó¦µÄÁòËáµÄÖÊÁ¿Îªx
Na2CO3+H2SO4=Na2SO4+H2O+CO2¡ü
98 44
x 0.22g
$\frac{98}{x}=\frac{44}{0.22g}$
x=0.98g
ÁòËáÈÜÒºµÄÖÊÁ¿Îª$\frac{0.98g}{19.6%}$=5g
ËùÒÔÓëÇâÑõ»¯ÄÆ·´Ó¦µÄÏ¡ÁòËáµÄÖÊÁ¿Îª10g-5g=5g£¬ËùÒÔm=5£®
¹ÊÌ5£®
µãÆÀ ÔÚ½â´ËÀàÌâʱ£¬Ê×ÏÈ·ÖÎö·´Ó¦Ó¦ÓõÄÔÀí£¬È»ºó½áºÏͼÏóÖеÄתÕ۵㣬ÒÔ¼°·½³ÌʽÖеıÈÀý¹ØÏµ½øÐнâ´ð£®
| ʵÑéÄ¿µÄ | ʵÑé·½·¨ | |
| A | ³ýÈ¥KCl¹ÌÌåÖеÄKClO3 | ¼ÓÈëÉÙÁ¿MnO2¹ÌÌ壬¼ÓÈÈ |
| B | ¼ø±ðӲˮºÍÈíË® | µÎ¼Ó·ÊÔíË®Õñµ´£¬¹Û²ì²úÉúÆøÅݵÄÇé¿ö |
| C | ±È½ÏÈËÌåÎüÈëÆøÌåºÍºô³öÆøÌåÖÐO2µÄº¬Á¿ | ½«´ø»ðÐǵÄľÌõ·Ö±ð²åÈëÁ½ÖÖÆøÌåÖÐ |
| D | ̽¾¿Ï¡ÑÎËáºÍNaOHÈÜÒºÊÇ·ñÍêÈ«·´Ó¦ | Ïò·´Ó¦ºóÈÜÒºÖмÓÈëAgNO3ÈÜÒº |
| A£® | A¡¢ | B£® | B¡¢ | C£® | C¡¢ | D£® | D¡¢ |
| ´ÎÊý | µÚÒ»´Î | µÚ¶þ´Î | µÚÈý´Î |
| ¼ÓÈëÏ¡ÁòËáÖÊÁ¿/g | 20 | 20 | 20 |
| Éú³ÉÇâÆøµÄÖÊÁ¿/g | 0.08 | 0.08 | 0.04 |
£¨1£©¹²ÖƵÃÇâÆø0.2g£®
£¨2£©ÊµÑéËùÓÃÏ¡ÁòËáÖÐÈÜÖʵÄÖÊÁ¿·ÖÊý£®£¨Ð´³ö¼ÆËã¹ý³Ì£©
| A£® | ·Ö½â·´Ó¦ | B£® | ¸´·Ö½â·´Ó¦ | C£® | Öû»·´Ó¦ | D£® | »¯ºÏ·´Ó¦ |
| A£® | ÂÈ»¯ÄÆÓÃÓÚÖÆÑÎËá¡¢ÂÈÆøµÈ»¯¹¤ÔÁÏ | |
| B£® | ÇâÑõ»¯ÄÆÈÜÒº³ýÈ¥ÓÍÎÛ | |
| C£® | Ò»Ñõ»¯Ì¼×öȼÁÏ | |
| D£® | ½ð¸ÕʯÓÃÀ´ÇиÁ§ |
| A£® | Ã×·¹¡¢ÍÁ¶¹ | B£® | ·¬ÇÑ¡¢»Æ¹Ï | C£® | Å£Èâ¡¢¼¦µ° | D£® | É«ÀÓÍ¡¢»¨Éú |