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Biochem problem

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  • 10-10-2011 8:50pm
    #1
    Wailin
    Registered Users Posts: 4,416 ✭✭✭


    Wondering can I get some help with these biochem problems. Given the composition of a growth medium and the quantity of each. Peptone has a concentration of 2% w/v and need to find out how much would I use to make up 950ml of medium......

    The medium also contains K2SO4 (2g/L), what is the concentration expressed in mM/L?

    Any help or hints would be appreciated.


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    #2
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,053 Mod ✭✭✭✭Capt'n Midnight


    we aren't here to do your home work :p

    what does w/v mean ?

    have you worked out the molecular weight of potassium sulphate ?


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    #3
    Wailin
    Registered Users Posts: 4,416 ✭✭✭Wailin


    w/v is weight per volume, 2%w/v is equal to 2g/100ml or 20g/l. I managed to figure it out anyway, the summer break from college didnt help the brain cells and it was almost like starting over again! Thanks anyway:D


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