# Question #edd2c

##### 1 Answer

Dec 26, 2014

The answer is

I've done a little research and discovered that, for *mannitol* (a sugar alcohol derived from the sugar manose by reduction) solutions, the concentration is usually **w/v**.

A **w/v** solution is used when a substance is mixed as a dry mass (grams) per mL (volume):

So, a **20% w/v** solution would have **20.0 g** of mannitol for every **100 mL** of solution -> 20g/100mL . Therefore, the volume needed for **5.0 g** of mannitol is