Question

plt 1 780 MHA 2569 MKOH mi of NOH A Caklate the volume of original HA |Remember mal" of acid-moles of basel B. Which indicator would be the best for this sokudtion? Why (pH range 1,2-2 8) (pH range 4263) a Thymel Biue b Mathyl Red c Bromothymol Blue d Cresol Red pI range 60-76) pH range: 72-8.8) pht range 8.3-10.0) C. Calculate th4E01ๆ when 390mLofKOH has been ttrated in the urinown acld Solution D Calculate the pH of the solution at the point where 410 ml of KOH is added?

Answer 1

Answes uation Fos acdd HA F base kot. to veact Completely 22569M 1180 V- 57730 mL v, = 677m

2 Boomothymal Blue the best sfos His seactton because its PH xarge (6.nes oh PH are of wacon Foom Cove sang It ge best solutioh Wen 390 mL Kottfsgbokad o.th ưkron ac d sautfon cf volume 571mL. Total Volune ce Solution-volume ce addr ciume of base 577+390 -907mL

Volume of sluton n 1L4 Puaties addtian of lomL to saufon lead to inc in PH 二25.69x63 of. koH is added

"Total volume of scluRon=volume oe add t. Vclume of base OH- 168