Calculate The PH Of A Solution That Is 0.181 M NH3 And 0.24 M NH4Cl.

Subject ZIP Search Search Find an Online Tutor Now Ask Ask a Question For Free Login Chemistry Calculate the pH of a solution that is 0.181 M NH3 and 0.24 M NH4Cl.

Calculate the pH of a solution that is 0.181 M NH3 and 0.24 M NH4Cl.

Kb of NH3 is 1.8 x 10-5.

The answer is 9.13

please explain the steps, thank you :)

Follow • 2 Add comment More Report

1 Expert Answer

Best Newest Oldest By: Best Newest Oldest

This is a buffer since you have a weak base (NH3) and the conjugate acid (salt) which is NH4Cl, or simply NH4+. For such calculations you can use the Henderson Hasselbalch equation.

For a base, the HH equation is pOH = pKb + log [salt]/[base]

For an acid, the HH equation is pH = pKa + log [salt]/[acid]

Since we are dealing with a weak base in the current problem, we will use the former:

pOH = pKb + log [NH4Cl]/[NH3]

To find the pKb from the Kb, simply take the negative log of the Kb. -log1.8x10-5 = 4.745

pOH = 4.745 + log [0.24]/[0.181]

pOH = 4.745 + log 1.326

pOH = 4.745 + 0.123 = 4.868

Then to find the pH, we can use pH + pOH = 14 and pH = 14 - pOH

pH = 14.00 - 4.868

pH = 9.13

Upvote • 0 Downvote Add comment More Report

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem. Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.

¢ € £ ¥ ‰ µ · • § ¶ ß ‹ › « » < > ≤ ≥ – — ¯ ‾ ¤ ¦ ¨ ¡ ¿ ˆ ˜ ° − ± ÷ ⁄ × ƒ ∫ ∑ ∞ √ ∼ ≅ ≈ ≠ ≡ ∈ ∉ ∋ ∏ ∧ ∨ ¬ ∩ ∪ ∂ ∀ ∃ ∅ ∇ ∗ ∝ ∠ ´ ¸ ª º † ‡ À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö Ø Œ Š Ù Ú Û Ü Ý Ÿ Þ à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô õ ö ø œ š ù ú û ü ý þ ÿ Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ ς σ τ υ φ χ ψ ω ℵ ϖ ℜ ϒ ℘ ℑ ← ↑ → ↓ ↔ ↵ ⇐ ⇑ ⇒ ⇓ ⇔ ∴ ⊂ ⊃ ⊄ ⊆ ⊇ ⊕ ⊗ ⊥ ⋅ ⌈ ⌉ ⌊ ⌋ 〈 〉 ◊

RELATED TOPICS

Math Science Biology Physics Biochemistry Organic Chemistry Chemical Engineering Moles Stoichiometry Chem ... Ap Chemistry Ap Physics Thermodynamics Gas Laws Chemical Reactions General Chemistry College Chemistry Chemistry Measurement Word Problem Chemistry Lab Chemistry Conversion

RELATED QUESTIONS

How many photons are produced?

Answers · 3

Why does salt crystals dissolve in the water?

Answers · 9

How much copper wire can be made from copper ore?

Answers · 2

If a temperature scale were based off benzene.

Answers · 3

why does covalent bonds determine the polarity of water?

Answers · 8

RECOMMENDED TUTORS

Nick T.

4.9 (77)

Ken D.

5.0 (665)

Lohith D.

5.0 (486) See more tutors

find an online tutor

• Chemistry tutors
• Physical Chemistry tutors
• Organic Chemistry tutors
• AP Chemistry tutors
• Biochemistry tutors
• Thermodynamics tutors
• Chemical Engineering tutors
• Heat Transfer tutors