ÌâÄ¿ÄÚÈÝ

¡¾ÌâÄ¿¡¿ÓÐÒ»°üº¬ÓÐ̼ËáÄƺÍ̼ËáÇâÄƵĻìºÏÎΪÁ˲ⶨÆ京Á¿£¬¼¼ÊõԱСӱȡ19gÑùÆ··ÅÈëÉÕ±­ÖУ¬¼ÓÈë100gË®³ä·ÖÈܽâºó£¬ÖðµÎµÎÈëÏ¡ÑÎËá²¢²»¶Ï½Á°è£¬ÖÁBµãʱǡºÃÍêÈ«·´Ó¦¡£²â³öÉÕ±­ÄÚÈÜÒºµÄ×ÜÖÊÁ¿Óë¼ÓÈëÏ¡ÑÎËáÖÊÁ¿µÄ¹ØϵÇúÏßÈçͼËùʾ£¨·´Ó¦Éú³ÉµÄÆøÌåÈ«²¿Òݳö£©¡£ÒÑ֪̼ËáÄÆÓëÏ¡ÑÎËá·´Ó¦·ÖÁ½²½½øÐУº

µÚÒ»²½·´Ó¦£ºNa2CO3+HCl=NaCl+NaHCO3

µÚ¶þ²½·´Ó¦£ºNaHCO3+HCl=NaCl+H2O+CO2¡ü

Ç󣺣¨1£©Í¼ÖÐAB¶Î±íʾµÚ ²½·´Ó¦£»·´Ó¦ºóÉú³ÉµÄ¶þÑõ»¯Ì¼ÖÊÁ¿ÊÇ g£®

£¨2£©Ëù¼ÓÈëµÄÏ¡ÑÎËáÖÐÈÜÖÊÖÊÁ¿·ÖÊýÊǶàÉÙ£¿

£¨3£©ÑùÆ·ÖÐ̼ËáÇâÄƵÄÖÊÁ¿ÊǶàÉÙ£¿

¡¾´ð°¸¡¿£¨1£©¶þ 8£®8 £¨2£©7£®3% £¨3£©8£®4g

¡¾½âÎö¡¿

ÊÔÌâ·ÖÎö£º£¨1£©¸ù¾Ý̼ËáÄÆÓëÏ¡ÑÎËá·ÖÁ½²½½øÐеķ´Ó¦·ÖÎö£¬µÚÒ»²½·´Ó¦²¢Ã»ÓвúÉúÆøÌ壬µÚ¶þ²½¿ªÊ¼²úÉúÆøÌ壬¹ÊͼÖÐAB¶Î±íʾµÚ¶þ²½·´Ó¦£¬¸ù¾ÝÖÊÁ¿Êغ㶨ÂÉ£º·´Ó¦ºóÉú³ÉµÄ¶þÑõ»¯Ì¼ÖÊÁ¿=119g+150g-260£®2g= 8£®8g

£¨2£©¸ù¾Ý»¯Ñ§·½³Ìʽ£ºNaHCO3+HCl=NaCl+H2O+CO2¡üÖÐCO2ÓëHClµÄÖÊÁ¿¹Øϵ£¬¿É¼ÆËã³öÓëNaHCO3·´Ó¦µÄHClÖÊÁ¿£¬½øÒ»²½¼ÆËãÏ¡ÑÎËáÖÐÈÜÖÊÖÊÁ¿·ÖÊý

½â£ºÉèHClÖÊÁ¿Îªx

NaHCO3+HCl=NaCl+H2O+CO2¡ü

36£®5 44

x 8£®8g

36£®5£º44=x:8£®8g

x=7£®3g

Ï¡ÑÎËáÖÐÈÜÖÊÖÊÁ¿·ÖÊý=7£®3g/100g¡Á100%=7£®3%

£¨3£©¸ù¾ÝͼÏñ¿ÉÖª£¬µÚÒ»²½·´Ó¦ÏûºÄµÄÑÎËáÖÊÁ¿Îª50g£¬ÈÜÖÊHClÖÊÁ¿=50g¡Á7£®3%=3£®65g£¬È»ºóÔÙ¸ù¾ÝµÚÒ»²½·´Ó¦£ºNa2CO3+HCl=NaCl+NaHCO3ÖÐHClÓëNa2CO3µÄÖÊÁ¿¹Øϵ£¬¼ÆËã³öNa2CO3µÄÖÊÁ¿

½â£ºÉèNa2CO3µÄÖÊÁ¿Îªy

Na2CO3+HCl=NaCl+NaHCO3

84 36£®5

y 3£®65g

84£º36£®5=y:3£®65g

y=8£®4g

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø