Question

0.5M NaOH ke 500ml mai kitna jal milye ki solution ki consternation 10mg/ml ho jai ​

Answer 1

Answer:

500 ml

Explanation:

strength of NaOH = 10 mg / ml or 10 gm /L ; then molarity = strength / mol. mass. = 10 / 40 = 0.25 M

       now ; let x ml water is to be added in 500 ml to prepare the desired conc.of NaOH

        then from the molarity eq.  before

dilution       after dilution

                                                       M1 V1          =       M2 V2

                                                     O.5 × 500     =    0.25 × (500 +x )

                on solving  ;                  1000              =  500 + x 

                                             then        x             = 500 ml

(500ml pani ka milaya jaega)

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