Back Titration: Tips for Aceing Your Exam

In summary, the conversation is about back titration, specifically of an acid-base pair. The process involves titrating an excess of the added substance and using stoichiometry to determine the amount of the substance being determined. It is compared to overpaying at a cashier and receiving change in smaller-value pieces.
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circuit232
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Hey guys! I have an exam tomorrow on back titration. Can i have some useful advice?
 
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  • #2
"Back titration" of what? Acid-base pairs? Redox couples? You will have to be a bit more specific.
 
  • #3
Bystander said:
"Back titration" of what? Acid-base pairs? Redox couples? You will have to be a bit more specific.
Oh sorry. I mean Back Titration of acid-base pair.
 
  • #4
Technically all back titrations are identical - you titrate an excess of the added substance. List what is being determined, what is being added in excess, what is the titrant, write all reaction equations - and then it is just a stoichiometry to follow.
 
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  • #5
It's like you do not have exact change when you take items you want to buy to the cashier. You overpay with larger value pieces and the cashier give you the extra change in smaller-value pieces. This means you net paid what the purchase cost was.
 
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1. What is back titration?

Back titration is a technique used in chemistry to determine the amount of a substance by reacting it with an excess of another substance and then titrating the remaining excess to determine the initial substance's amount.

2. When is back titration used?

Back titration is commonly used when the reaction between the two substances is slow or when the substance being analyzed is in a small amount and cannot be easily titrated directly.

3. What are the steps involved in a back titration?

The first step is to react the unknown substance with an excess of a known substance. Then, the excess of the known substance is titrated with a third substance to determine the amount of the excess. Finally, the initial substance's amount is calculated using stoichiometry.

4. What are some tips for acing a back titration exam?

Some tips for acing a back titration exam include understanding the concept, practicing solving problems, and being familiar with the equipment and techniques used in back titration. It is also essential to carefully read and understand the question and show all the steps in your calculations.

5. What are some common sources of error in back titration?

Some common sources of error in back titration include incomplete reaction between the initial and excess substances, contamination of the substances, and errors in measurement or calculation. It is crucial to carefully follow the steps and use accurate and precise equipment to minimize these errors.

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