Question

when the formation of ca sult of a strung neid a What is the pH of the solution obtained by mixing 50.00 mL of 0.250M HCl and 50.00 mL of 0.500M NaOH? pOH = -log(. 500). 301 3. What is the pH of a solution that is 0.20M in sodium acetate and 0.40M in acetic acid? (K, for acetic acid is 1.85 x 10.) 4. What is the pH of the solution obtained by mixing 50.00 mL of 0.1250M HOAc and 25.00 mL of 0.1000M NaOH?

I'm having trouble setting up the problems for questions 3-4, please help

Answer 1

- 5 3. Criven that ra- 1.85 x 10 ... 'ка - 12 к - 107-85*109) - 5-109.85 - 4.733 - Pra from Henderson equation (s = concern of CH₂ Loona Ca = cone of Acetie a 0.4 - 4.733 + 209 = 4.733 - 1072 [4.432) = [4.432) Ph of the sol3

3.75 4. 2000 ml 16.) any not? Confarin requin i 50 mL of 0.125 fon) • sox0.125 quis of che coon = 6.25* 1000 103 egun and 25 me of 0.100 e 250.100 equr of whom. 1 mo = 2.5210-3 eqin of room enean and remain = (6.25 n10 – 2.5 410 3 . & 410 -3 ewide When they are mined together and salt produced will be non 2.5x10 3 cain. it is a buffer : C = 2.5 * 10 = 0.667 ~ 0.67 3.75 & 10 3 . PA = exo + log Pka = 4.73 + log 0.67 - 4.73 - 0.18 = 4.556 17.56)