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Chemistry Titration Basic Question?

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  • 16-02-2014 4:50pm
    #1
    yoyojc
    Registered Users Posts: 278 ✭✭


    Hi, revising over and forgot how tricky the titration question calculations are... I'm getting most of the answers just wondering.

    If I have a 1L 0.1 Molar solution and half it i.e. it becames 500cm cubed does that still contain 0.1 Molars or do you half that two?


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    #2
    Moody_mona
    Registered Users Posts: 1,107 ✭✭✭Moody_mona


    Molar means moles per litre, so it remains a 0.1M solution but because it's not a litre, it's 500ml, it contains 0.05 moles.


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    #3
    yoyojc
    Registered Users Posts: 278 ✭✭yoyojc


    Moody_mona wrote: »
    Molar means moles per litre, so it remains a 0.1M solution but because it's not a litre, it's 500ml, it contains 0.05 moles.

    thanks alot :)


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    #4
    MegGustaa
    Registered Users Posts: 232 ✭✭MegGustaa


    An easy way to remember these things (it took me a while to really 'get' moles etc) is that number of moles = Concentration (in M or moles/L) x Volume (in Litres).

    So in this case n = 0.1 moles/L x 0.5L = 0.05 moles :)


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