Question

need help with question 1,3,4

TITRATION OF THE ACID CONTENT IN VINEGAR PRE-LA QUESTIONS: Name Partners) Date Section Instructor 1. What characteristics determine whether a compound will make a good indicator? ffffffffflere prin 2. Write the correct balanced equations for the following neutralization reactions: a) phosphoric acid and sodium hydroxide b) sulfuric acid and lithium hydroxide b) hydrochloric acid and barium hydroxide 3. Why is it important to stop titrating when the faint pink color in the Erlenmeyer flask remains? 4. Why is a pipet used rather than a graduated cylinder to measure the volume of the vinegar

Answer 1

ople value of indicator must be close to pH- of equivalence point of to be a good indicator 2 when faint pink colour remains – it indicate the ad titration reached and point- as looses the pink colour in Erlenmeyer flaske if acid is still prosent. but it no amoun of acid in present in flask.. the pink colour remains as the condition now is basic affor and paint. So it indicates and of completion of reaction - (endpoint) so we Carid hase titration) must stop the to trating to note vet of herethe Vol of base required to completion of raction, if we continue the pin even after end point, light pink changes to dark pink and vol. of base is more now and error increases pipet gives exact (more accurate) volume vingar than graduated cylindor. So we two case pipet. ①