[dhon]

I'm a bit confused on how to make the following:

Recipe for 100 ml of 0.25M KCl in 20% sucrose
Recipe for 100 ml of 0.25M KCl in 10% sucrose

Stock:

• 0.5M Kcl
• 0.5M KCl, 20% sucrose
• 20% sucrose
• 0.5M NaCl
• Water

I'm ok with calculating with just one type of stock used and diluting with water, but the mixing with percentages and molarity has me confused. 

Thanks for any help

[dhon]

Actually I think I just realized problem 1 would be 50ml of Stock 2 and 50ml water to make 100ml 0.25M KCl in 20% Sucrose.

Still confused about what to do with 10% sucrose though

[Arkcon]

Really? Adding water dilutes the KCl, but not the sucrose? That's not true.