化学配置溶液问题,英文.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:英语作业 时间:2024/07/26 01:56:59
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!
![化学配置溶液问题,英文.](/uploads/image/z/19765386-18-6.jpg?t=%E5%8C%96%E5%AD%A6%E9%85%8D%E7%BD%AE%E6%BA%B6%E6%B6%B2%E9%97%AE%E9%A2%98%2C%E8%8B%B1%E6%96%87.)
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