Can Someone Do This Example Please, Bases and Acids
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Can Someone Do This Example Please, Bases and Acids

[From: ] [author: ] [Date: 11-05-09] [Hit: ]
34.2grams in 500 mls would make .......
I don't understand how to solve these types of questions.

What mass of sucrose, C12H24O11, is needed to make 500 mL of a 0.20 M solution?

Break down step by step please.

Thanks in advance!

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molecular weight of sucrose is 342 grams , so a 1 molar solution would be 342grams/ 1 liter
you have a half a liter so you can divide that in half to make a 1 molar solution for 500 mils , so you have 171 grams/ .5L (500mls) you further more want only .2 molar not an entire mole so you can break it up by multiplying by 1/5 or .2 this 34.2 grams of sucrose. 34.2grams in 500 mls would make .2M

*Hopefully me taking out all the dimensional analysis bull crap and just showing it as it is helps*

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i love dat chemistry

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