Calculate the pH during the titration of 20.00 mL of 0.1000 M trimethylamine, (CH3)3N(aq), with 0.1000...

Calculate the pH during the titration of 20.00 mL of 0.1000 M trimethylamine, (CH3)3N(aq), with 0.1000 M HNO3(aq) after 19.4 mL of the acid have been added. Kb of trimethylamine = 6.5 x 10-5

Correct Answer:

8.30 ± 0.02

Solutions

Expert Solution

millimoles of base = B = 20 x 0.1 = 2

millimoles of H+ = 0.1 x 19.4 = 1.94

B + H+ ---------------------> BH+

2 1.94 0 -------------> I

0.06 0 1.94 ------------> E

pOH = pKb + log [BH+ / B]

pOH = 4.19 + log (1.94 / 0.06)

pOH = 5.70

pH + pOH = 14

pH = 8.30

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

Calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH(aq) with 0.1000 M...

Calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH(aq) with 0.1000 M NaOH(aq) after 12 mL of the base have been added. Ka of formic acid = 1.8 x 10-4.

Calculate the pH during the titration of 20.00 mL of 0.1000 M C6H5OH(aq) with 0.1000 M...

Calculate the pH during the titration of 20.00 mL of 0.1000 M C6H5OH(aq) with 0.1000 M NaOH(aq) after 19.9 mL of the base have been added. Ka of phenol = 1.0 x 10-10.

Calculate the pH during the titration of 20.00 mL of 0.1000 M C2H5COOH(aq) with 0.1000 M...

Calculate the pH during the titration of 20.00 mL of 0.1000 M C2H5COOH(aq) with 0.1000 M KOH(aq) after 19.9 mL of the base have been added. Ka of propanoic acid = 1.3 x 10-5.

Calculate the pH during the titration of 20.00 mL of 0.1000 M hydrazine, NH2NH2(aq), with 0.2000...

Calculate the pH during the titration of 20.00 mL of 0.1000 M hydrazine, NH2NH2(aq), with 0.2000 M HBr(aq) after 3.5 mL of the acid have been added. Kb of hydrazine = 1.7 x 10-6.

1)Calculate the pH during the titration of 20.00 mL of 0.1000 M HF(aq) with 0.2000 M...

1)Calculate the pH during the titration of 20.00 mL of 0.1000 M HF(aq) with 0.2000 M LiOH(aq) after 4 mL of the base have been added. Ka of HF = 7.4 x 10-4. 2)Calculate the pH during the titration of 20.00 mL of 0.1000 M morphine(aq) with 0.100 M HCl(aq) after 10 mL of the acid have been added. Kb of morphine = 1.6 x 10-6 Thank you.

Determine the pH during the titration of 36.3 mL of 0.281 M trimethylamine ((CH3)3N, Kb =...

Determine the pH during the titration of 36.3 mL of 0.281 M trimethylamine ((CH3)3N, Kb = 6.3×10-5) by 0.281 M HBr at the following points. (Assume the titration is done at 25 °C.) Note that state symbols are not shown for species in this problem. (a) Before the addition of any HBr ? (b) After the addition of 15.7 mL of HBr ? (c) At the titration midpoint ? (d) At the equivalence point ? (e) After adding 57.7 mL...

Find the pH during the titration of 20.00 mL of 0.1000 M triethylamine, (CH3CH2)3N (Kb =...

Find the pH during the titration of 20.00 mL of 0.1000 M triethylamine, (CH3CH2)3N (Kb = 5.2 ×10−4), with 0.1000 M HCl solution after the following additions of titrant. (a) 11.00 mL: pH = (b) 20.60 mL: pH = (c) 26.00 mL: pH =

Calculate the pH during the titration of 25.00 mL of 0.1000 M HBrO(aq) with 0.1000 M...

Calculate the pH during the titration of 25.00 mL of 0.1000 M HBrO(aq) with 0.1000 M LiOH(aq) after 16 mL of the base have been added. Ka of hypobromous acid = 2.3 x 10-9.

Calculate the pH during the titration of 25.00 mL of 0.1000 M HF(aq) with 0.1000 M...

Calculate the pH during the titration of 25.00 mL of 0.1000 M HF(aq) with 0.1000 M RbOH(aq) after 15 mL of the base have been added. Ka of HF = 7.4 x 10-4. Please use I.C.E Table and Before/After Reaction Table.

1. Calculate the pH during the titration of 25.00 mL of 0.1000 M LiOH(aq) with 0.1000...

1. Calculate the pH during the titration of 25.00 mL of 0.1000 M LiOH(aq) with 0.1000 M HI(aq) after 24.2 mL of the acid have been added. 2. Calculate the pH during the titration of 30.00 mL of 0.1000 M CH3CH2COOH(aq) with 0.1000 M LiOH(aq) after 12 mL of the base have been added. Ka of propanoic acid = 1.3 x 10-5. Please help these questions!

Subjects