0
An indicator shows when we have added just enough of the second reagent to react with the first. If you mean why do we add only a small amount of indicator, it is to keep the answer accurate. Some of the reagent is used changing the indicator so the answer is always slightly bigger than perfection, and the more indicator you add, the larger the error.
Still curious? Ask our experts.
Chat with our AI personalities
Ezra
Beau
Lao
Add your answer:
Earn +20 pts
How half titration could be done using only an indicator solution without PH?
In a half titration, you can use an indicator solution without needing to measure pH by adding the indicator directly to the reacting mixture and observing the color change. This can help you identify the endpoint of the titration, where half of the analyte has been neutralized. The color change will indicate the completion of the reaction, signaling that half of the titrant has been added.
What is the chemical process for back titration?
In back titration, a known excess of a reagent is added to react with the analyte. After the reaction is complete, the amount of excess reagent is determined by titration with another reagent. The difference between the initial amount of excess reagent and the amount required in the back titration is used to determine the amount of analyte present.
Does the amount of potassium iodide added to the potassium iodate solution affect the amounts of iodine liberated in iodometric titration?
Yes, the amount of potassium iodide added to the potassium iodate solution in iodometric titration affects the amount of iodine liberated. Potassium iodide serves as a reducing agent, reacting with the iodate ion to form iodine. The quantity of potassium iodide added determines the rate and completeness of this reaction, impacting the amount of liberated iodine available for titration.
Why KI is added in redox iodometric titration even in the presence of sodium thiosulfate as a reducing agent?
KI is added in redox iodometric titration as an indicator because it reacts with iodine formed during the titration to form a starch-iodine complex, which gives a blue color. This color change helps detect the endpoint of the titration accurately. Sodium thiosulfate is used to titrate the excess iodine after the reaction with the analyte is complete.
Why potassium thiocyanate is added in redox iodometric titration of copper sulphate?
Potassium thiocyanate is added to the redox iodometric titration of copper sulfate to react with the excess iodine produced during the reaction. This reaction forms a stable product, potassium iodide, which helps reach the correct endpoint of the titration by preventing the iodine from reacting with other substances. It also helps improve the accuracy and precision of the titration results.
