(a) A student carries out a titration to find the concentration of some sulfuric acid. The student finds that 25.00 cm of 0.0880 mol dm aqueous sodium hydroxide, NaOH, is neutralised by 17.60 cm of dilute sulfuric acid, H2SO4. H2SO4(aq) + 2NAOH(aq) → Na,SO,(aq) + 2H2O(1) (1) Calculate the amount, in moles, of NaOH used.

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Chapter1: Chemical Foundations
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(a)
A student carries out a titration to find the concentration of some sulfuric acid.
The student finds that 25.00 cm of 0.0880 mol dm aqueous sodium
hydroxide, NaOH, is neutralised by 17.60 cm of dilute sulfuric acid,
H2SO4.
-3
H2SO4(aq) + 2NaOH(aq) → Na2SO,(aq) + 2H2O(1)
(i)
Calculate the amount, in moles, of NaOH used.
answer =
mol
(ii)
Determine the amount, in moles, of H2SO4 used.
answer
mol
(ii) Calculate the concentration, in mol dm3, of the sulfuric acid.
answer =
mol dm3
(b) After carrying out the titration in (a), the student left the resulting solution to
crystallise. White crystals were formed, with a formula of Na2SO4•x H2O
and a molar mass of 322.1 g mol.
What term is given to the x H2O' part of the formula?
Using the molar mass of the crystals, calculate the value of x.
answer =
Transcribed Image Text:(a) A student carries out a titration to find the concentration of some sulfuric acid. The student finds that 25.00 cm of 0.0880 mol dm aqueous sodium hydroxide, NaOH, is neutralised by 17.60 cm of dilute sulfuric acid, H2SO4. -3 H2SO4(aq) + 2NaOH(aq) → Na2SO,(aq) + 2H2O(1) (i) Calculate the amount, in moles, of NaOH used. answer = mol (ii) Determine the amount, in moles, of H2SO4 used. answer mol (ii) Calculate the concentration, in mol dm3, of the sulfuric acid. answer = mol dm3 (b) After carrying out the titration in (a), the student left the resulting solution to crystallise. White crystals were formed, with a formula of Na2SO4•x H2O and a molar mass of 322.1 g mol. What term is given to the x H2O' part of the formula? Using the molar mass of the crystals, calculate the value of x. answer =
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