Question
Please answer all the questions in the picture
Between 1.5 to 2 hours are required to perform the titrations needed to standardize your KMnO4 solution. Do not forget to add sulfuric acid to acidify the solution. Write the net ionic equation for the sulfuric acis solution reacting with the sodium oxalate solution. Once the solution is acidlified, the solution contains oxalic acid rather than oxalate ion. The resulting solution is heated to increases the rate of the titraction reaction. The initial portion of KMnO4 solution you add to the hot sodium oxalate solution will turn the solution pink. The pink color will persist for a while, because the initial reaction is slow. The Mn2+ that forms promotes the reaction, causing the pink color to disappear more rapidly once the Mn2+ is present. Write and balance the net ionic equation for the oxalic acid reacting with the permanganate ion in caidic solution. A valid end point occurs when the last drop (or part of a drop) causes the hot solution to change from coloriess to pink and the color change persists for at least 30 seconds wiht swirling. Make sure that you rised the sides of the flask with deionized water, there are no new bubbles in the tip, and the solution is still hot. If you have added too much titrant solution, you may back-titrate to get a better end point. Read the burets after you have a good endpoint. Titrate standing so the pink color can be observed against the white base of the burst stand. If you are right-handed. operate the bead with your left hand so your left hand so you can swirk with your right hand. Swirling with your less coordinates hand can result in losing some of your solution due to splashing some of the solution out of the Ertenmeyer flask. For calculation, use the unit equation approach. For this titration, there are two resources (solid sodium oxalates and the standard sodium oxalate solution) and one oxidizer. What is the oxidizer? from your titration data, you will calculate the morality of the potassium permanganate solution. Since we are using concentrations in terms of molarities, you will use the mole ratio from the .Show the generic set-up here with put actual volumes, masses, or molarities. Once you have several titrations. you will ger an idea of the agreement between your experimental result a by calculating the extreme relative deviation. The extreme relative deviation is the absolute difference between the highest experimental value and the lowest experimental value divided by either value. Typically, the ratio is converted to percent (multiply by 100%) or parts per thousand.
Explanation / Answer
1. Net ionic reaction Sulphuric acid with sodium oxalate
5Na2C2O4 + 2KMnO4 + 8H2SO4 ---> K2SO4 + 5Na2SO4 + 2MnSO4 + 10CO2 + 8H2O
2.The net ionic equation for oxalic acid reaction with permanganate ion in acidic solution
2MnO4- + 5 H2C2O4 + 6H+ ----> 2 Mn2+ + 10CO2 + 8H2O