10) In procedure B you are performing an acid-base titration and the reaction yo
ID: 575799 • Letter: 1
Question
10) In procedure B you are performing an acid-base titration and the reaction you are looking at is: H+ + OH- H2O.
By performing this acid-base titration, you will be able to learn about the total amount of H+ in solution. It is important to understand the differences between the amounts of ascorbic and citric acids and the total amount of H+ in solution. Here is an example to help you understand.
Consider the two following solutions:
Solution 1 is prepared by dissolving 1.0 mol of ascorbic acid and 1.0 mol of citric acid in 1.0 L of water.
Solution 2 is prepared by dissolving 2.5 mol of ascorbic acid and 0.50 mol of citric acid in 1.0 L of water. Which of the following statement(s) is (are) correct when both of these solutions are titrated with the same NaOH solution?
Select all that apply.
A) Although solutions 1 and 2 contain different quantities of ascorbic and citric acids, they will both require the same amount of NaOH solution to reach the equivalence point.
B)Overall, 3.0 mol of OH- ions will be needed to titrate solution 2.
C)Overall, 4.0 mol of OH- ions will be needed to titrate solution 1.
D)Overall, 4.0 mol of OH- ions will be needed to titrate solution 2.
E)The total amount of NaOH solution required to reach the equilvalence point for solutions 1 and 2 cannot be the same as the number of moles of each acid is different.
F)Overall, 2.0 mol of OH- ions will be needed to titrate solution 1.
Explanation / Answer
Ans :B) Overall , 3.0 mol of OH- ions will be needed to titrate the solution 2
E) The total amount of NaOH solution required to reach the equivalence point for solutions 1 and 2 cannot be same as the number of moles of each acid is different .
F) overall , 2.0 mol of OH- ions will be needed to titrate solution 1
Since the total number of moles of acid in solution 1 is 2 mol and in solution 2 is 3 mol , the number of moles of hydroxide ions generated from NaOH solution to titrate the acid will be proportional to them.
Acids give off H+ ions , and bases give off OH- ions , that react together to form neutral H2O.
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