Advertisements
Advertisements
Question
Complete the reaction mentioning all the products formed:
\[\ce{Cr2O^{2-}7 + 3H2S + 8H^+ ->}\]
Advertisements
Solution
\[\ce{Cr2O^{2-}7 + 3H2S + 8H^+ -> 2Cr^{3+} + 7H2O + 3S}\]
Dichromate oxidises hydrogen sulphide to sulphur in an acidic medium.
APPEARS IN
RELATED QUESTIONS
Complete the following equations: Cr2O72- + 14H+ + 6I →
Complete the following equation:
\[\ce{2MnO4- + 6H+ + 5NO2- ->}\]
Complete the following equations:Cr2O72- + 2OH- →
Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing pH on a solution of potassium dichromate?
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with iron (II) ions? Write the ionic equation for the reaction.
Complete the following equation :
Which of the following is amphoteric oxide?
\[\ce{Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O4}\]
Indicate the steps in the preparation of \[\ce{K2Cr2O7}\] from chromite ore.
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with SO2? Write the ionic equation for the reaction.
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid? Write the ionic equation for the reaction.
