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WorksheetsPractical -1 and 2
Total questions: 10
Worksheet time: 5mins
The formula of Mohr's salt is
FeSO4.NH4SO4.6H2O
NH4Fe(SO4)2.6H2O
(NH4)2Fe(SO4)2.H2O
FeSO4.(NH4)2SO4.6H2O
The molar mass of Mohr's salt is
382 g mol-1
392 g mol-1
292 g mol-1
362 g mol-1
Conc. sulphuric acid is added to the preparation of standard Mohr's salt solution is
to make the solution acidic
to prevent hydrolysis of Mohr's salt
to make the solution neutral
to make the solution basic
No. of moles of solute dissolved per kg of solvent is termed as
molality
molarity
mole fraction
normality
The apparatus not used in the preparation of standard Mohr's salt solution is
volumetric flask
burette
analytical electronic balance
none of these
The end point of this titration is
colourless to light permanent pink
colourless to orange
colourless to black
pink to orange
Indicator used in this titration is
Phenolphthalein
Methyl orange
Potassium permanganate
None of these
The oxidising agent in this redox titration is
Mohr's salt
KMnO4
(NH4)2SO4
H2SO4
the oxidation number of Mn in KMnO4 is
4
5
7
8
The formula used for the calculation of the result of this titration is
VMnO4- x MMnO4- x 5 = VFe2+ x MFe2+ x 1
VMnO4- x MMnO4- x 2 = VFe2+ x MFe2+ x 10
VMnO4- x MMnO4- = VFe2+ x MFe2+
VMnO4- x MMnO4- x 3 = VFe2+ x MFe2+ x 2
