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Homework Statement
2.0g of pure undiluted HsSO4 is cautiously added to water and the solution diluted to 500 cm3. What volume of 0.1M potassium hydroxide, KOH, would exactly neutralise 25cm3 of the acid solution?
Homework Equations
concentration = number of moles/volume
mass in grams = number of moles*relative formula mass
The Attempt at a Solution
H2SO4
2.0g/500cm3
Divide by 20 to get values for 25cm3
0.1g/25cm3
Conversion of grams to M
mass in grams = number of moles*relative formula mass
0.1g = number of moles*98
0.1g/98 = number of moles = 1.02moles
We now have
1.02M/25cm3
Let us work out the concentration...
25/100 * 1.02 = 0.0255molar
Now let us work out the volume
Concentration = number of moles/volume
Concentration*volume = number of moles
volume = number of moles/concentration
volume = 1.02/0.0255
volume = 40cm3
Is this correct?