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犇�?

铁杆木虫 (职业作家)

院士

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6楼: Originally posted by 33560 at 2013-05-14 11:25:12
还是不对啊,可以简单计算下,这种方法配出的浓度不会是0.37mol/L...

不是还有加热这一步呢么
我就是我
11楼2013-05-14 14:34:39
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wenleisong

金虫 (小有名气)

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nbgf(hanches代发): 金币+2, 感谢应助,BB奖励~~~ 2013-08-07 19:45:01
从一摩尔的大约1760毫升蒸馏水纯净的,加入氢氧化钠(70毫升)配制成浓度为0.37摩尔/升的纯净的溶液,然后呢加热至沸腾就好了!
12楼2013-05-14 15:15:50
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hanches

铁杆木虫 (正式写手)

obscure nacissus

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7楼: Originally posted by 33560 at 2013-05-14 11:28:25
还是不对啊,按照这种翻译配出的溶液浓度应该是0.038mol/L...

对,那个70ml我开始理解错了,不是取70,是得到70,所以最后应该是:
取一定量的1M 氢氧化钠溶液l于约1760ml蒸馏水中,得到浓度为0.37 mol/l 的氢氧化钠溶液,取出70 ml,加热至沸。

[ Last edited by hanches on 2013-5-14 at 21:11 ]
Life-Has-Killed-The-Dream-I-Dreamed.
13楼2013-05-14 21:08:47
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小草5559

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nbgf(hanches代发): 金币+2, 感谢应助,BB奖励~~~ 2013-08-07 19:45:17
Sodium hydroxide (70 ml) was taken from one molar solution in approximately 1760 ml of distilled water to have the concentration of 0.37 mol/l and heated to boiling.
取70ml 1M的氢氧化钠溶液溶入1760ml的蒸馏水中,得到浓度为0.37M的溶液,加热至沸腾
梦想这个东西,只要你想去努力,什么时候都不晚
14楼2013-05-14 23:53:26
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outer_07

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nbgf(hanches代发): 金币+1, 感谢应助~~欢迎常来本版参与交流~~ 2013-08-07 19:45:32
Sodium hydroxide (70 ml) was taken from one molar solution in approximately 1760 ml of distilled water to have the concentration of 0.37 mol/l and heated to boiling.
你应该贴出上下文呀。这个1mol溶液的摩尔浓度是多少?
15楼2013-05-15 11:47:08
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nbgf

新虫 (初入文坛)

引用回帖:
15楼: Originally posted by outer_07 at 2013-05-15 11:47:08
Sodium hydroxide (70 ml) was taken from one molar solution in approximately 1760 ml of distilled water to have the concentration of 0.37 mol/l and heated to boiling.
你应该贴出上下文呀。这个1mol溶液 ...

Mn–Zn ferrite of composition Mn0.4Zn0.6Fe2O4 was
prepared by the co-precipitation method. The materials
used were manganese chloride (98% Merck, India), zinc
chloride (96% Merck, India), iron (III) chloride (98%
Merck, India) and sodium hydroxide (96% Merck, India).
One molar solution of these materials was made with
distilled water. Sodium hydroxide (70 ml) was taken from
one molar solution in approximately 1760 ml of distilled
water to have the concentration of 0.37 mol/l and heated to
boiling. Manganese chloride, zinc chloride and iron (III)
chloride were taken from their molar solution in accurate
stoichiometric proportions. These solutions were poured as
quickly as possible into the boiling solution of NaOH
under vigorous stirring produced by the glass mechanical
stirrer (500 rpm). Mixing is very important;
16楼2013-05-17 14:21:59
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nbgf

新虫 (初入文坛)

引用回帖:
15楼: Originally posted by outer_07 at 2013-05-15 11:47:08
Sodium hydroxide (70 ml) was taken from one molar solution in approximately 1760 ml of distilled water to have the concentration of 0.37 mol/l and heated to boiling.
你应该贴出上下文呀。这个1mol溶液 ...

楼上就是上文
文章名称:Study of dielectric behaviour of Mn–Zn nano ferrites
17楼2013-05-17 14:23:08
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zhtear99

铁杆木虫 (著名写手)

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3楼: Originally posted by nbgf at 2013-05-14 10:46:33
翻译的有点不对哦,NaOH本身就是固体的单位不可能是mL。
这句话大意应该是从配好的NaOH溶液中取70ml,我只是没有理顺这个准确意思......

一般实验室都会配好母液(浓度较高的),再加蒸馏水等将母液稀释到需要的浓度。
生是过往,跋涉虚无之境
18楼2013-05-17 18:58:11
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