Question

MLIM HNO, solution 260 ml. De water 30 mL 0.1 M NaOH solution PROCEDURE The pH meter should already be calibrated at pH 4, 7 and 10. If your pH meter appears not to be operating properly, notify your TA and they will recalibrate the meter. Please handle the pH probe carefully the tip is made of a fragile glass membrane. Be sure to rinse the probe with water and blet it dry with a kimwipe whenever it is transferred from one solution to another Part 1: Mixing Ratios 1. Set up two burets, one for acetic acid (HC,H,O:) and one for sodium acetate (NaC,H,O). Obtain about 100 mL or 0.5 M acetic acid and 100 mL of 0.5 M sodium acetate from the stock bottles 2. Make the following mixtures and record the pH of the resulting solutions. Volume of 0.5 M Volume of 0.5 M Volume of Dl water Solution ID acetic acid (L.) sodium acetate (mL) 15.0 15.0 15.0 3.0 15.0 1.5 ACCESSOISTAMIIIIIIII1111111111TTTTII 3.0 1.5 15.0 3. Keep solution A for use in Part II and Part III Keep solution for use in Part II

calculate the theoretical ph of solution F and N.

Answer 1

The answer is given in the attachment .

Solutiona 1 15.080. 5M final concentration of acetic acid, Paid] = 11545 20.25 M. final uncentration of sodium acetate Isalt] 20.25Meimilarly). Hence, pH of the buffer from Henderson-Hasselbalch equation- pH = pka tog kalt 1 2 4.8+ log essay pH24.81 Solution of Just diluhon has negligible change in pH of buffer. That also we cannot calculate due to insufficient activity data. So, we consider- [pH=48. bren malhematically also, affer dilubom, Italf felicid pHaplea 29.8." Fohnson-N Tomax 0.15 Mt Som 20:1M ) = 0.175M Tand] = - Toro) and Isalt] =((Ombro:25M-10 mx OfM) 22 0.0075 M. 10 W 00075 okatlog pH=pkatlog [falt] laced 0.175 sept 87 (137) pH = 3.43 .