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shiwani sharma Grade:
        

a sodium hydroxide solution contains 40% by weight of NaOH has specific gravity= 1.5. wat volume of this soln. is required to get 500 ml of .45M SOLUTION

6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

40% by weight means , 40gm NaOH in 100 gm solution..


dincity of solution = 1.5                  (given)


volume of sol = 100/1.5  = 66.66ml  = 0.066L                          (dencity = mass/vol)


in 40gm NaOH no of moles = 40/M.wt = 40/40 = 1


molarity of sol = 1/0.066 = 15M/L


now we have M2V1 = M2V2


  15V = 0.45*500


   V =  15ml     ans


approve if u like my ans

6 years ago
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