½â£º
£¨1£©·½°¸Ò»£º¿ÉÑ¡ÔñNaClÈܽâÔÚÕôÁóË®ÖнøÐÐÅäÖÆ£¬ÐèÒªNaClµÄÖÊÁ¿=100g¡Á0.9%=0.9g£¬ÐèҪˮµÄÖÊÁ¿=100g-0.9g=99.1g£»
·½°¸¶þ£º¿ÉÑ¡ÔñÏò0.5%µÄNaClÈÜÒº¼ÓÈëNaCl£¬¼ÌÐøÈܽâ¶øÅäÖÆ£¬ÉèÐèÒªÂÈ»¯ÄƵÄÖÊÁ¿Îªx£¬x+£¨100g-x£©¡Á0.5%=100g¡Á0.9%£¬½âµÃx=0.4g£¬ÐèÒª0.5%µÄNaClÈÜÒº=100g-0.4g=99.6g£»
·½°¸Èý£ºÑ¡Ôñ1.5%µÄNaClÈÜÒººÍ0.5%µÄNaClÈÜÒº½øÐлìºÏÅäÖÆ£¬ÉèÐèÒª1.5%µÄNaClÈÜÒºÖÊÁ¿Îªy£¬y¡Á1.5%+£¨100g-y£©¡Á0.5%=100g¡Á0.9%£¬½âµÃy=40g£¬ÐèÒª0.5%µÄNaClÈÜÒº=100g-40g=60g£»
·½°¸ËÄ£ºÑ¡Ôñ1.5%µÄNaClÈÜÒº¼ÓÕôÁóˮϡÊͽøÐÐÅäÖÆ£¬ÉèÐèÒª1.5%µÄNaClÈÜÒºÖÊÁ¿Îªz£¬z¡Á1.5%=100g¡Á0.9%£¬½âµÃz=60g£¬ÐèҪˮµÄÖÊÁ¿=100g-60g=40g£»
£¨2£©ÉèÂÈ»¯ÄƵÄÖÊÁ¿Îªx
NaCl+AgNO
3¨TAgCl¡ý+NaNO
358.5 143.5
x 2.87g
=
x=1.17g
¸ÃÉúÀíÑÎË®µÄÈÜÖÊÖÊÁ¿·ÖÊý=
¡Á100%=0.9%£¬·ûºÏÒ½Óñê×¼£»
¹Ê´ð°¸Îª£º
£¨1£©·½°¸Ò»£ºÑ¡ÔñNaClºÍÕôÁóË®ÅäÖÆ£®ÐèÒªNaClµÄÖÊÁ¿=100g¡Á0.9%=0.9g£¬ÐèҪˮµÄÖÊÁ¿=100g-0.9g=99.1g£»
·½°¸¶þ£ºÑ¡ÔñNaClºÍ²¿·Ö0.5%µÄNaClÈÜÒºÅäÖÆ£®ÉèÐèÒªÂÈ»¯ÄƵÄÖÊÁ¿Îªx£¬x+£¨100g-x£©¡Á0.5%=100g¡Á0.9%£¬½âµÃx=0.4g£¬ÐèÒª0.5%µÄNaClÈÜÒº=100g-0.4g=99.6g£»
·½°¸Èý£ºÑ¡Ôñ1.5%µÄNaClÈÜÒººÍ0.5%µÄNaClÈÜÒº½øÐÐÅäÖÆÉèÐèÒª1.5%µÄNaClÈÜÒºÖÊÁ¿Îªy£¬y¡Á1.5%+£¨100g-y£©¡Á0.5%=100g¡Á0.9%£¬½âµÃy=40g£¬ÐèÒª0.5%µÄNaClÈÜÒº=100g-40g=60g£»
·½°¸ËÄ£ºÑ¡Ôñ1.5%µÄNaClÈÜÒººÍÕôÁóË®½øÐÐÅäÖÆ£¬ÉèÐèÒª1.5%µÄNaClÈÜÒºÖÊÁ¿Îªz£¬z¡Á1.5%=100g¡Á0.9%£¬½âµÃz=60g£¬ÐèҪˮµÄÖÊÁ¿=100g-60g=40g£»
£¨2£©·ûºÏÒ½Óñê×¼£®
·ÖÎö£º£¨1£©¸ù¾ÝÓûÅäÖÆ100gÉúÀíÑÎË®£¬ÐèÒª0.9gNaClºÍ99.1gË®£¬ÀûÓÃËùÌṩµÄÒ©Æ·£¬¿É²ÉÈ¡¹ÌÌåÈܽ⡢ŨÈÜÒº¼ÓˮϡÊÍ¡¢Ï¡ÈÜÒº¼ÓÈëÂÈ»¯ÄƼÌÐøÈܽâ»òŨϡÈÜÒº½øÐлìºÏµÈ·½·¨£¬È¡Êʵ±Ò©Æ·£¬Ê¹Ö®Âú×ãÅäÖÆÈÜÒºËùÐèҪˮµÄÂÈ»¯ÄƵÄÖÊÁ¿£¬»ìºÏ¾ùÔȼ´¿É£»
£¨2£©¸ù¾Ý·´Ó¦µÄ»¯Ñ§·½³Ìʽ£¬ÓÉÉú³ÉÂÈ»¯Òø³ÁµíµÄÖÊÁ¿£¬¼ÆËã¸ÃÉúÀíÑÎË®130gÖÐËùº¬ÂÈ»¯ÄƵÄÖÊÁ¿£¬Çó³ö¸ÃÉúÀíÑÎË®ÖÐÂÈ»¯ÄƵÄÖÊÁ¿·ÖÊý£¬²¢Óë0.9%½øÐжԱȣ¬ÅжÏÊÇ·ñ·ûºÏÒªÇó£®
µãÆÀ£ºÅäÖÆÈÜÒºÒ»°ã¿É²ÉÈ¡¹ÌÌåÎïÖÊÖ±½ÓÈܽ⡢ŨÈÜÒº¼ÓˮϡÊ͵ķ½·¨£¬Ò²¿ÉÒÔ²ÉÈ¡Ï¡ÈÜÒº¼ÌÐøÈܽâ¸ÃÈÜÖÊ»òŨϡÈÜÒº»ìºÏµÄ·½·¨ÅäÖƶø³É£®