Question

what is the answer for number 3?

Exercises: 8 H20 2 MnO2 5C2O42 16 H Mn2 5 CO2 + 1. What is the oxidizing agent in the balanced net ionic equation above? What is the reducing agent? Which e lement is oxidized? Which element is reduced 2 I 32.24 mL of a 0.0185 M KMnO, solution were required to titrate the iron in a 0.989 g of unknown iron sample. Calculate the percent iron in the sample. 3. Indicate what error (small, large, or none) is introduced into the percent iron in the unknown and explain briefly why in each case. a. If the permanganate solution contains some contaminant b. If H2SO4 is not added to the solution. C. If some iron unknown is spilled after weighing, but before titrating with KMnO4. 4. Using the Internet, find the MSDS for phosphoric acid, sulfuric acid and potassium permanganate. Write in table form the chemical name, formula, MW, density, hazard and any other cautionary information. What is the importance of redox reactions in biological systems? 5. gwes becaute

Answer 1

3) a) if permanganate is contaminated volume of permanganate consumed by iron will be increased it leads to increase in concentration then the error will be LARGE

b) there is no influence of H2SO4 on error

c) decrease in iron weight leads to decrease in concentration of iron then it results in high permanganate concentrations. So, the error is SMALL in this case.