3. (i) What are the oxidizing agents in #1 and #2? (ii) What is the stoichiometric ratio between dichromate and thiosulfate? 4. Calculate the molar concentration of the thiosulfate solution.
The iodine produced when excess of KI was added to the solution containing 0.1259 g K2Cr2O7 required a 41.26 mL titration with Na2S2O3 required a 41.26 mL titration with Na2S2O3.
P.S. Be able to answer numbers 3 and 4 ONLY.
1. Determine if it is basic or acidic and write the
- Unbalance equation: Cr2O72- (aq) + I- (aq) → Cr3+ + I2 (aq)
2. Determine if it is basic or acidic and write the balance redox reaction of iodine with sodium thiosulfate in acidic medium.
- Unbalance equation: S2O3 2- (aq) + I2 (aq) → S4O6 2- (aq) + I- (aq)
3. (i) What are the oxidizing agents in #1 and #2? (ii) What is the stoichiometric ratio between dichromate and thiosulfate?
4. Calculate the molar concentration of the thiosulfate solution.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
