What is a 40% sugar solution in moles per dm^3?

I have written in my plan that I will use 40% sugar solutions...and I need to know what that would be as a concentration like mol dm^3...??

Reply 1

NathanM

14

I think its 0.4 mol l-1 (if you think of 1mol l-1 as 100%) :confused:

Reply 2

moleo

40% sugar solution means:
40g in 100ml water

http://en.wikipedia.org/wiki/W/v

As you are using different solutions the concentration will vary depending on which sugar you are using.

Reply 3

McBren

I need to make a 0.25 and 0.5 mol glucose solution so would it be 25g and 50g mixed with 100ml of water? The molecular mass has been put on the container but im unsure how to make the required solutions from it?

Reply 4

nikk

15

McBren

I need to make a 0.25 and 0.5 mol glucose solution so would it be 25g and 50g mixed with 100ml of water? The molecular mass has been put on the container but im unsure how to make the required solutions from it?

I think I am right in saying...

For 0.5 mol....

0.5 x 0.1 = .05

.05 x 180.16(FW) = 9g

So weigh 9g of glucose and dissolve into 100ml of double-distilled water.

Can someone check that is correct? My maths is not the best :redface: