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CBSE Class 12-science Answered

Find the molarity of 5m NaOH solution haveing 1.5gm)ml
Asked by 01abhishek072005 | 18 Sep, 2020, 10:08: PM
Expert Answer
5 molal solution means 5 mole of solute is present in 1000 g of solvent.
W h e n space n u m b e r space o f space m o l e s equals 5

Mass space of space 5 space moles space of space NaOH equals 5 cross times 40 equals 200 space straight g
Mass space of space solution equals 1000 plus 200 equals 1200 space straight g
Volume space of space solution equals fraction numerator 1200 straight g over denominator 1.5 space straight g divided by ml end fraction equals 800 space ml
Molarity equals space fraction numerator Number space of space moles over denominator Volume space of space solution space in space straight L end fraction
space space space space space space space space space space space equals fraction numerator 5 over denominator 0.800 end fraction
space space space space space space space space space space space equals 6.25 space straight M
Answered by Ravi | 19 Sep, 2020, 11:44: PM
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