作者coolbaby119 (小屈)
看板TransBioChem
标题Re: [化学]
时间Fri Jul 6 08:20:43 2007
※ 引述《SNAKEY ()》之铭言：
: 1.
: calculate the ph of a mixed solution of 0.4M acetic acid and 0.6M sodium
: acetic. the Ka for acetic acid is 1.8乘10的负五次方
: (log0.67=-0.17 log1.5=0.18 log1.8=0.26 )
HA ->H+ + A-
0.4 0.6
-x +x +x
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: 2.If 325 ml of 0.333M Nacl is diluted to 2.00L with pure water, what is the
: molar concentration of Nacl in the diluted solution?
前後溶质不变
设溶质y 莫尔
0.325x0.333=2 x y
: 3.The radius of a lithium atom is 152 pm. what is this in meter?
: 拜托大家帮个忙 @@
152pm=152*10^-12m
单位转换而已
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1F：推 SNAKEY:感恩阿^^ 203.67.39.119 07/07 11:01