What is dimensional analysis when a #5*mL# volume of a solution whose concentration is #0.1*mol*L^-1# is considered?

What molar quantity is contained in this volume?

1 Answer
Apr 4, 2017

Answer:

An idea as to whether you have the correct order of operations/calculation........

Explanation:

You have #0.1*mol# of stuff dissolved in #1*L# of water............

Clearly this solution has units of concentration, in #mol*L^-1#. You take #5*mL# of this solution, and #"how many moles do you have?"#

well the product, #"concentration"xx"volume"# gives:

#0.1*mol*cancel(L^-1)xx5xx10^-3cancelL=??mol#

And the answer is in #"moles"#, as you require. Had you got an answer with units of #L# or #L*mol^-1# you would know that something had gone awry - it is easy to make these kind of mistakes. Anyway, if you would respecify your question, someone will have another go.