ÌâÄ¿ÄÚÈÝ
£¨2006?ÏÃÃÅÄ£Ä⣩ÈËÌåÄÚÄÆÔªËعýÁ¿ºÍȱ·¦¶¼½«µ¼ÖÂÉúÀí¼²²¡£¬Ò½ÁÆÉϳ£ÓõÄÉúÀíÑÎË®ÊÇÖÊÁ¿·ÖÊýΪ0.9%£¨ÃܶȽüËÆΪ1g/cm3£©µÄÂÈ»¯ÄÆÈÜÒº£¬ËüÊǶԸ¹ÐºÍÑË®²¡È˲¹ÄƵÄÖ÷ÒªÒ©Æ·£®
£¨1£©ÎªÁ˱£Ö¤ÈËÌåÄÚÄÆÔªËصÄƽºâ£¬³ÉÄêÈËÿÌìÒªÉãÈëÄÆÔªËØԼΪ2.3g£®Çë¼ÆËã³ÉÈËÿÌìÒËÉãÈë
£¨2£©Ä³Ñо¿Ð¡×é¶ÔһƿÉúÀíÑÎË®½øÐмì²â£¬ËûÃDzÉÓõķ½·¨ÊÇ£ºÈ¡65.0mlµÄÉúÀíÑÎË®ÂýÂýµÎÈë2%µÄÏõËáÒøÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©£¬ÖÁÇ¡ºÃ²»ÔÙ²úÉú³ÁµíΪ´Ë£¬¼Ç¼ËùʹÓõÄÏõËáÒøÈÜÒºµÄÌå»ý£¨·´Ó¦·½³ÌʽΪ£ºNaCl+AgNO3¨TAgCl+NaNO3£©£®Ï±íÊÇËûÃǼǼµÄÊý¾Ý£º
¢ÙÇëͨ¹ýʵÑéÊý¾Ý¼ÆËã´ËÉúÀíÑÎË®ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊý£®
¢Ú¸ù¾ÝÒÔÉϼÆËã½á¹û£¬ÅжÏÕâÉúÀíÑÎË®ÊÇ·ñºÏ¸ñ£®
£¨1£©ÎªÁ˱£Ö¤ÈËÌåÄÚÄÆÔªËصÄƽºâ£¬³ÉÄêÈËÿÌìÒªÉãÈëÄÆÔªËØԼΪ2.3g£®Çë¼ÆËã³ÉÈËÿÌìÒËÉãÈë
5.85
5.85
gÂÈ»¯ÄÆ£®£¨2£©Ä³Ñо¿Ð¡×é¶ÔһƿÉúÀíÑÎË®½øÐмì²â£¬ËûÃDzÉÓõķ½·¨ÊÇ£ºÈ¡65.0mlµÄÉúÀíÑÎË®ÂýÂýµÎÈë2%µÄÏõËáÒøÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©£¬ÖÁÇ¡ºÃ²»ÔÙ²úÉú³ÁµíΪ´Ë£¬¼Ç¼ËùʹÓõÄÏõËáÒøÈÜÒºµÄÌå»ý£¨·´Ó¦·½³ÌʽΪ£ºNaCl+AgNO3¨TAgCl+NaNO3£©£®Ï±íÊÇËûÃǼǼµÄÊý¾Ý£º
ʵÑé±àºÅ | 1 | 2 | 3 | ƽ¾ùÖµ |
ÉúÀíÑÎË®µÄÌå»ý£¨ml£© | 65.0 | 65.0 | 65.0 | 65.0 |
ÏõËáÒøÈÜÒºµÄÌå»ý£¨ml£© | 85.0 | 85.1 | 84.9 | 85.0 |
¢Ú¸ù¾ÝÒÔÉϼÆËã½á¹û£¬ÅжÏÕâÉúÀíÑÎË®ÊÇ·ñºÏ¸ñ£®
·ÖÎö£º£¨1£©¸ù¾Ý»¯ºÏÎïÖÐijԪËصÄÖÊÁ¿=¸Ã»¯ºÏÎïµÄÖÊÁ¿¡Á¸ÃÔªËصÄÖÊÁ¿·ÖÊý£¬½øÐзÖÎö½â´ð£®
£¨2£©¸ù¾ÝÌâÒ⣬65.0mLµÄÉúÀíÑÎË®ÂýÂýµÎÈë2%µÄÏõËáÒøÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©£¬ÖÁÇ¡ºÃ²»ÔÙ²úÉú³ÁµíΪ´Ë£¬ËùʹÓõÄÏõËáÒøÈÜÒºµÄƽ¾ùֵΪ85.0mL£¬¾Ý´ËÓÉ·´Ó¦µÄ»¯Ñ§·½³Ìʽ¼ÆËã³ö65.0mLµÄÉúÀíÑÎË®ÖÐÂÈ»¯ÄƵÄÖÊÁ¿£¬½ø¶ø¼ÆËã³öÉúÀíÑÎË®ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊý¼´¿É£®
£¨2£©¸ù¾ÝÌâÒ⣬65.0mLµÄÉúÀíÑÎË®ÂýÂýµÎÈë2%µÄÏõËáÒøÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©£¬ÖÁÇ¡ºÃ²»ÔÙ²úÉú³ÁµíΪ´Ë£¬ËùʹÓõÄÏõËáÒøÈÜÒºµÄƽ¾ùֵΪ85.0mL£¬¾Ý´ËÓÉ·´Ó¦µÄ»¯Ñ§·½³Ìʽ¼ÆËã³ö65.0mLµÄÉúÀíÑÎË®ÖÐÂÈ»¯ÄƵÄÖÊÁ¿£¬½ø¶ø¼ÆËã³öÉúÀíÑÎË®ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊý¼´¿É£®
½â´ð£º½â£º£¨1£©³ÉÄêÈËÿÌìÒªÉãÈëÄÆÔªËØԼΪ2.3g£¬Ã¿ÌìÒËÉãÈëÂÈ»¯ÄƵÄÖÊÁ¿Îª£º2.3g¡Â
¡Á100%=5.85g£»¹Ê´ð°¸Îª£º5.85£®
£¨2£©¢Ù½â£º65.0mlµÄÉúÀíÑÎË®ÂýÂýµÎÈë2%µÄÏõËáÒøÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©£¬ÖÁÇ¡ºÃ²»ÔÙ²úÉú³ÁµíΪ´Ë£¬ËùʹÓõÄÏõËáÒøÈÜÒºµÄƽ¾ùֵΪ85.0mL£¨85cm3£©£¬ÆäÖÊÁ¿Îª£º1g/cm3¡Á85cm3=85g£¬
ÉèËùÈ¡ÑùÆ·Öк¬ÓÐÂÈ»¯ÄƵÄÖÊÁ¿ÎªX£¬
NaCl+AgNO3¨TAgCl+NaNO3
58.5 170
X 85g¡Á2%
=
X=0.585g
65.0mL£¨65cm3£©ÉúÀíÑÎË®µÄÖÊÁ¿Îª1g/cm3¡Á65cm3=65g£¬
´ËÑùÆ·ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊý=
¡Á100%=0.9%£®
¢Ú´ËÑùÆ·ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊýΪ0.9%£¬ÎªºÏ¸ñ²úÆ·£®
´ð£º¢Ù´ËÑùÆ·ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊýΪ0.9%£»
¢Ú¸ÃÉúÀíÑÎË®ºÏ¸ñ£®
23 |
23+35.5 |
£¨2£©¢Ù½â£º65.0mlµÄÉúÀíÑÎË®ÂýÂýµÎÈë2%µÄÏõËáÒøÈÜÒº£¨ÃܶȽüËÆΪ1g/cm3£©£¬ÖÁÇ¡ºÃ²»ÔÙ²úÉú³ÁµíΪ´Ë£¬ËùʹÓõÄÏõËáÒøÈÜÒºµÄƽ¾ùֵΪ85.0mL£¨85cm3£©£¬ÆäÖÊÁ¿Îª£º1g/cm3¡Á85cm3=85g£¬
ÉèËùÈ¡ÑùÆ·Öк¬ÓÐÂÈ»¯ÄƵÄÖÊÁ¿ÎªX£¬
NaCl+AgNO3¨TAgCl+NaNO3
58.5 170
X 85g¡Á2%
58.5 |
170 |
X |
85g¡Á2% |
65.0mL£¨65cm3£©ÉúÀíÑÎË®µÄÖÊÁ¿Îª1g/cm3¡Á65cm3=65g£¬
´ËÑùÆ·ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊý=
0.585g |
65g |
¢Ú´ËÑùÆ·ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊýΪ0.9%£¬ÎªºÏ¸ñ²úÆ·£®
´ð£º¢Ù´ËÑùÆ·ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊýΪ0.9%£»
¢Ú¸ÃÉúÀíÑÎË®ºÏ¸ñ£®
µãÆÀ£º±¾ÌâÄѶȲ»ÊǺܴó£¬ÕÆÎÕ»¯Ñ§Ê½µÄÓйؼÆËã¡¢¸ù¾Ý»¯Ñ§·½³ÌʽÓëÈÜÖÊÖÊÁ¿·ÖÊýµÄ×ۺϼÆËãÊÇÕýÈ·½â´ð±¾ÌâµÄ¹Ø¼ü£®
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿