chemistry

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Concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 hcl solution?

My calculation
500ml x 1:200 =2.5 1:200 means 1gm/200ml
2.5 x 36.5 = 91.25
91.25/0.38=240.13
240.13/1.18 = 204ml This is my answer. I am not sure. Pls helps me .

  • chemistry -

    dude that's very messed up
    solution:-
    first calculate the molarity from % concentration and take volume to be 1L
    ==>
    d=m/v
    m=d*v
    m=1000ml*1.18g/ml=1180g.
    molarity=(1180/36.5)/1L=32.32M
    using c1v1=c2v2
    v1=c2v2/c1
    v1=((1/200)*500)/32.32=0.077ml

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