# Question & Answer: Which type of titration is used to quantify the amount of ascorbic acid in juice? a) acid-base…..

Which type of titration is used to quantify the amount of ascorbic acid in juice? a) acid-base titration only or (b) redox titration only or (c) both titrations Which type of titration allows you to quantify the amount of citric acid in juice? (a) acid-base titration only or (b) redox titration only or (c) both titrations If a is graduated every 0.1 to what decimal place should you report for a measurement? _____ A student prepares and fills a with NaOH. What is wrong with the following starting point for the titration? (see picture at right) What would you see (or not see) during a titration if you did not add to the flask? A student measured out a 150 mL (portion) of juice into an Erlemmeyer flask. She added 3 drops of to the solution. It took 27.30 mL of 0.1003 M NaOH to reach the endpoint of the titration. (a) Determine the moles of NaOH required for the titration. Use sig figs! (b) What is the net ionic equation for an acid-base neutralization reaction? (

Following is the Solution to the first question (i.e. Question – 1 ), of the given …Question Set.

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The answer to the problem, is Choice – (b): redox titration only……..

Explanation:

Since Juice contains both of the following acids: i.e. …..

1. Ascorbic acid &
2. Citric acid

​…titration with NaOH (i.e. base )…. i.e. acid – base titration …would only be able to determine the total amount of acid, in the …given solution, i.e. the given Juice, and thereby in order to determine the amount of Ascorbic Acid …separately….we will need another type of titration.

$\Rightarrow$ Since, Iodine (I2 ) reacts with Ascorbic acid … ONLY …and not ….citric acid…. in order to determine the amount of Ascorbic acid, we will need an red-ox. ….reaction/titration…. ( i.e. reaction between ascorbic acidand I2…is a red-ox reaction….).

Therefore:

Since, the above stated and described… redox titration , involves the reaction with Ascorbic Acid only… theamount of Ascorbic acid in the Juice can be determined with the use of REDOX Titration …. Only…. (Answer )