mól dm (b) After carrying out the titration in (a), the student left the resulting solution to crystallise. White crystals were formed, with a formula of Na2S04°x H20 and a molar mass of 322.1 g mol. 3:3.1. (1) What term is given to the x H2O' part of the formula? (ii) Using the molar mass of the crystals, calculate the value of x.
mól dm (b) After carrying out the titration in (a), the student left the resulting solution to crystallise. White crystals were formed, with a formula of Na2S04°x H20 and a molar mass of 322.1 g mol. 3:3.1. (1) What term is given to the x H2O' part of the formula? (ii) Using the molar mass of the crystals, calculate the value of x.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Just b (i-ii)
Transcribed Image Text:12.
A student carries out a titration to find the concentration of some sulfuric acid.
(a)
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
H2SO(aq) + 2NaOH(aq) → Na2SO,(aq) + 2H2O(1)
(1)
Vome o8 NaoH= 7S ,00 em-
Molarity of NaoHe O,0880 mol dm-3
Volume of M28043 17,60 cvnd
moles =
Calculate the amount, in moles, of NaOH used.
25,00dm
1000
molority y rolume
0.0880X2025
answer = .2.NQ022 mol
(ii)
Determine the amount, in moles, of H2SO4 used.
0.0011
O10022
answer =
mol
(iii) Calculate the concentration, in mol dm, of the sulfuric acid.
concantratio
noles
VoIUme
%3D
0,0011
0.0176
(29675
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 Na2S04°x H20
and a molar mass of 322.1 g mol.
(1)
What term is given to the x H2O' part of the formula?
(ii)
Using the molar mass of the crystals, calculate the value of x.
answer =
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