Question

what is the ph for solutions G, R, S ans T?

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 DI water and blot it dry with a Kimwipe whenever it is transferred from one solution to another.

Part I: Mixing Ratios

1. Set up two burets, one for acetic acid \(\left(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\right)\) and one for sodium acetate \(\left(\mathrm{NaC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\right)\). Obtain about \(100 \mathrm{~mL}\) of \(0.5 \mathrm{M}\) acetic acid and \(100 \mathrm{~mL}\) of \(0.5 \mathrm{M}\) sodium acetate from the stock bottles. \(B\)

2. Make the following mixtures and record the pH of the resulting solutions.

3. Keep solution A for use in Part II and Part III. Keep solution C for use in Part III.

Answer 1

of an Answer To calculate weak acid pH . the pH of the mixture and its salt, pka in [Acid] . for solution. A, - concentration of acetic acid = 0.25m S sodium acetate = 0.25m pka of acetic acid = 3.8 So ph of A = 3.8 6.2 - Log = 3.8 2 0.2 cs Scanned with CamScanner

Solution But with i was prepared by diluting Aladdition dilution ph of a butter does not . water) change. also from the dilution off solution Наме G ее is с = 3. . *for solution R Ť Rin only deionised water, nearly neutral ph , which so it should have is 7. .. to s is a mixture of lomlot Dl water and 10 ml of oil m HNO3 effective concentration of CHA] = 0.05 m pH = -log coos-] = 103 - Nash (oilm) * T => lo ml of DI water & 10 ml of COH-] = 0.05 mi poh = 113 pH = 1401.3 12.7 . cs Scanned with CamScanner