What is the pH of the solution that results from adding 26.2 mL of 0.14 M...

What is the pH of the solution that results from adding 26.2 mL of 0.14 M to 25.9 mL of 0.41 MNH3? (Ka for ammonium ion is 5.6*10^-10).

pH-------------------?

Solutions

Expert Solution

What is the pH of the solution that results from adding 26.2 mL of 0.14 M HCl to 25.9 mL of 0.41 MNH3?
(Ka for ammonium ion is 5.6*10^-10).

pH-------------------?

moles of HCl ---> (0.14 mol/L) (0.0262 L) = 0.003668 mol
moles NH3 ---> (0.41 mol/L) (0.0259 L) = 0.010619 mol

The HCl and NH3 react in a 1:1 molar ratio and all the HCl is used up.

moles NH3 remaining ---> 0.010619 mol - 0.003668 mol = 0.006951 mol
moles NH4^+ produced ---> 0.003668 mol

the henderson-Hasselbalch equation:

pH = pKa + log (base/acid)

pH = -log(5.6*10^-10) + log (0.006951 / 0.003668)

pH = 9.252 + 0.277 = 9.53

The pH of the resulting solution is 9.53

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

What is the pH of the solution that results from adding 27.7 mL of 0.12 M...

What is the pH of the solution that results from adding 27.7 mL of 0.12 M HCl to 25.9 mL of 0.41 M NH3 ? (Ka for ammonium ion is 5.6 x 10-10 .) pH =

1a) What is the pH of a solution of adding 10 mL of a 0.10 M...

1a) What is the pH of a solution of adding 10 mL of a 0.10 M NaOH solution to pure water? b) What is the pH of a buffered solution created by adding 10 mL of a 0.10 M NaOH to 40 mL of a 0.15M solution of HF, Ka =6.8x10–4? c) Buffer 1 is created such that the weak acid, HA, is 0.80 M and base, A–, is 0.80 M. Buffer 2 is created such that the weak acid,...

What is the pH of the solution which results from mixing 35 mL of 0.50 M...

What is the pH of the solution which results from mixing 35 mL of 0.50 M NH3(aq) and 35 mL of 0.50 HCI(aq) at 25 degree C? (Kb for NH3 = 1.8*10^-5). Please show all work. The answer is pH=4.32

Calculate the pH of 0.14 M RbOCl solution

What is the pH of a solution obtained by adding 50.0 mL of 0.100 M NaOH...

What is the pH of a solution obtained by adding 50.0 mL of 0.100 M NaOH (aq) to 60.0 mL of 0.100 M HCl (aq)? Select one: a. 11.96 b. 2.04 c. 3.11 d. 7.00 QUESTION 2 What is the pH of a solution prepared by dissolving 5.86 grams of propanoic acid, CH3CH2COOH (l), and 1.37 grams of NaOH (s) in enough water to make exactly 250.0 mL of solution. pKa = 4.87 for propanoic acid? Select one: a. 4.58...

What is the final pH of the solution that results when 10.0 mL of 0.1 M...

What is the final pH of the solution that results when 10.0 mL of 0.1 M HCl(aq) is added to 90.0 mL of a buffer made of 1.00M HCN (Ka = 6.2 × 10-10) and 1.00M NaCN?.

1. Calculate the pH of a solution that results from mixing 15 mL of 0.13 M...

1. Calculate the pH of a solution that results from mixing 15 mL of 0.13 M HBrO(aq) with 11 mL of 0.1 M NaBrO(aq). The Ka value for HBrO is 2 x 10-9. 2. What is the buffer component ratio, (BrO-)/(HBrO) of a bromate buffer that has a pH of 7.91. Ka of HBrO is 2.3 x 10-9.

Question