In basic medium oxidises to form and itself changes into . The volume of required to react with 40 mL of is mL. (Rounded-off to the nearest integer)

Question

In basic medium  oxidises  to form  and itself changes into . The volume of  required to react with 40 mL of  is  mL. (Rounded-off to the nearest integer)

Canvas Classes · Accepted Answer

Step 1 — Determine n-factors:

:
Cr:  → gain of 3e⁻ per Cr → n-factor = 3

:
S in : average OS = 
S in : OS = 
Change per S = ; per  (2 S atoms) = 
n-factor of  = 8

Step 2 — Equivalents must be equal:

Step 3 — Moles of :

Step 4 — Moles of :

Step 5 — Volume:

Answer: 173 mL

More questions from Redox Reactions