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13 December, 11:31

0.1 gram mixture of solid substances containg sodium hydroxide and sodium chloride was titrated with 0.1 molar hydrochloric acid the complete reaction takes place by consumption of 10 mlof the acid calculate the percentage of sodium hydroxide in the mixture

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  1. 13 December, 13:04
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    No of moles of HCl = 0.1 x 10/1000 = 0.001 mole

    NaOH + HCl - -> NaCl + h2O

    No of moles of HCl = no of moles of NaOH

    Molar mass of NaOH = 23 + 16 + 1=40g

    Mass of NaOH = no of moles x molar mass = 0.001 x 40=0.04g

    Percentage = 0.04/0.1 x100=40%
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