神马作文网化学配置溶液问题,英文.
来源：学生作业帮 编辑：神马作文网作业帮 分类：英语作业 时间：2024/11/21 02:06:56
化学配置溶液问题,英文.
Make a 100ml solution of 50% (w/v) polyethylene glycol. The bottle you have available is labled PEG 3350 and has the following information (average molecular weight = 3350g/mole). Describe how to make this solution. (Remember percent = #g/100ml).
主要问题是计算各个量,不知道average molecular weight是不是包括水啊?求大神指导!
Make a 100ml solution of 50% (w/v) polyethylene glycol. The bottle you have available is labled PEG 3350 and has the following information (average molecular weight = 3350g/mole). Describe how to make this solution. (Remember percent = #g/100ml).
主要问题是计算各个量,不知道average molecular weight是不是包括水啊?求大神指导!
average molecular weight是指聚乙烯醇的平均分子量,当然不能包括水.配制50%质量浓度的溶液,应该是称取50g样品,加水定容至100mL