A flask contains a solution with an unknown amount of HCl. this solution is titrated with 0.0207 M NaOH. it takes 4.47ml of the NaOH solution to complete the reactions. what is the mass of the HCl?

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What is the molarity of the HCl required or the volume for complete titration?

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2015-11-07T16:46:03+05:30

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H Cl + Na OH ===>  H2 O + Na Cl

Number of moles in the 4.47 ml of 0.0207 M solution of Na OH :
         = 0.00447 * 0.0207  moles

So number of moles of H Cl in the solution mixed is same. 
Mass of HCl =  molecular mass  * number of moles
                     = 37.5 * 0.00447 * 0.0207  gms


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