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约找到 13 条结果，耗时 0.141 秒
本来以为今天下午可以做完硝酸镁浓缩硝酸的，但是浓缩硝酸镁和等待东西凉下来花了太多时间了。温度计还坏了。。。
刚才做了浓硫酸法浓缩硝酸，测出成品酸浓度比预计值小了24%。一看成品酸17ml，量筒没提前晾干，滴管没提前晾干。。。
如果放眼最终目的，有减压条件了也就不必要这么麻烦浓缩硝酸了，一根分馏柱又不贵，稍微高一点室温下就能达到精馏的效果
主播的kk浓缩硝酸终于成功了，获得96%的硝酸。kk按80%计，原酸64%按60%，kk过量50g。投入稀硝酸38ml，产出19ml。产率75%。硝酸损失推测是由于其分解以及含硝硫酸的生成所致
我用它(浓度以90%计）浓缩硝酸，产品硝酸实际值每次都跟计算值差了12%至15%。所以初步排除容器中带水或者方法本身的问题。因为如果是这样的话，每次误差应该不会这么接近。（我一共做了四次）
{{ resource.name || resource.oname }}
格式：{{ (resource.ext || '未知').toUpperCase() }}大小：{{ getSize(resource.size) }}
{{ resource.description || '暂无简介' }}
加载中...
{{ errorInfo }}
{{ downloadWarning }}
你在 {{ downloadTime }} 下载过当前文件。
文件名称：{{ resource.defaultFile.name }}
下载次数：{{ resource.hits }}
所需积分：{{ costScores }}，{{ holdScores }}下载当前附件免费{{ description }}
文件已丢失
当前账号的附件下载数量限制如下：
| 时段 |
个数 |
| {{f.startingTime}}点 - {{f.endTime}}点 |
{{f.fileCount}} |