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प्रश्न
Write down the concentration of the following solution in g/L and mol/L.
7.3g HCl in 100ml solution
संख्यात्मक
उत्तर
Given:
Weight in grams = 7.3g
Volume in litres = 100 mL = 0.1L (1mL = 1/1000L)
Molecular mass of HCl = 1 + 35.4 = 36.4 g/mol
Concentration in `"g"/"L" = (7.3"g")/(0.1"L")`
Concentration in g/L = 73g/L
No. of Moles(n) = `"weight"/"molecular mas"`
= `(7.3"g")/(34.5 "g/mol")`
= 0.2 mol
Concentration in `"mol"/"L" = "no. of mole"/"Volume in L"`
Concentration in `"mol"/"L" = (0.2 "mole")/(0.1 "L")`
Concentration in mol/L = 2mol/L
Thus, Concentration in g/L is 73g/L and Concentration in mol/L is 2mol/L.
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