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molar concentration

  • 16-10-2017 10:39am
    #1
    wardroberaider
    Registered Users, Registered Users 2 Posts: 3 ✭


    if i have 0.2g dm^-3 of NaCl
    is this equal to 0.2g/L


Comments

  • #2
    SOL
    Registered Users, Registered Users 2 Posts: 1,155 ✭✭✭SOL


    if i have 0.2g dm^-3 of NaCl
    is this equal to 0.2g/L
    Yes it is, the reason it is dm^-3 i.e. dm⁻³ is because it's per litre or l^-1 i.e. L⁻¹


    Edited the other post to correct it. The minus sign is because it is per liter (i.e. divided by liters). A decimeter is 1 tenth of a meter or 10 cm - a cube of 10 cm by 10 cm by 10 cm is 1 litre in volume... or 1000cm³ or 1dm³.

    If there are 0.2g per cube then that would be 0.2g/cube or 0.2g*cube⁻¹

    so 0.2g/dm³ or 0.2g*dm⁻³

    Hope that helps.


  • #3
    papu
    Registered Users, Registered Users 2 Posts: 3,357 ✭✭✭papu


    SOL wrote: »
    Edited the other post to correct it. The minus sign is because it is per liter (i.e. divided by liters). A decimeter is 1 tenth of a meter or 10 cm - a cube of 10 cm by 10 cm by 10 cm is 1 litre in volume... or 1000cm³ or 1dm³.

    If there are 0.2g per cube then that would be 0.2g/cube or 0.2g*cube⁻¹

    so 0.2g/dm³ or 0.2g*dm⁻³

    Hope that helps.

    Derp, thanks for correction


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