Mohr's salt is
Mohr's salt is
A
`FeS_(2).7H_(2)O`
B
`FeSO_(4)(NH_(4))_(2)SO_(4).6H_(2)O`
C
`Fe_(2)(SO_(4))_(3)(NH_(4))_(2)SO_(4).24H_(2)O`
D
`K_(2)SO_(4).Fe_(2)(SO_(4))_(3).24H_(2)O`
Text Solution
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The correct Answer is:
B
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STATEMENT-1 : The equivalent mass of Mohr's salt is (M)/(4) [If M is molecular mass of Mohr's salt] and STATEMENT-2: The normality of Mohr's salt is higher than molarity for same amount and volume at constant temperature.
Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is:
The mass of potassium dichromate crystal required to oxidise 750 cm^(3) of 0.6 M Mohr's salt solution is (molar mass=392)
KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. Mohr's salt, FeSO_4(NH_4)_2SO_46H_2O , is preffered over FeSO_4.7H_2O for standardisation of KMnO_4 solution because.
KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. The purple colour of KMnO_4 is due to
KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. When pyrolusite is fused with KOH and KClO_3 , we get
KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. If 0.1MK_2Cr_2O_7 solution were used in place of 0.1 MKMnO_4 solution used would be
KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. The volume of KMnO_4 solution that must have been added to obtain the faint pink colour at the end point must be
A mole of a mixture of Mohr's salt and Fe_2(SO_4)_3 requires 500mL of MK_2Cr_2O_7 for complete oxidation in acidic medium. The mole % of the Mohr's salt in the mixture is :
The oxidation number of S in Mohr's salt {FeSO_4(NH_4)_2SO_4*6H_2O} is