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Sagot :
The molecular weight of the solid acid in units of g/mole is 25 g/mol
given that :
mass of the solid acid =0.630 g
volume = 40.4 mL = 0.04 L
moles = molarity × volumes in liter
moles = 0.630 × 0.04 L
= 0.0252 mol
the molar mass formula is given as:
molar mass = mass / moles
molar mass = 0.630 g / 0.0252 mol
molar mass = 25 g/mol
Thus, carrying out an experiment to determine the mw of a solid acid with the generic formula H₃A. you weigh out 0.630 g of the solid acid in a weigh boat and transfer it to a 125 ml Erlenmeyer flask. after dissolving the acid in 25 ml of distilled water, you add 15.44 ml of 0.335 m Sr(OH)₂(aq) solution . the molecular weight of the solid acid in units of g/mole is 25 g/mol.
To learn more about moles here
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