1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
joja [24]
3 years ago
7

The molar ratio of HPO42- to H2PO4- in a solution is 1.4. Calculate the pH of the solution. Phosphoric acid (H3PO4) is a triprot

ic acid with 3 pKa values: 2.14, 6.86, and 12.4.
Chemistry
1 answer:
Bezzdna [24]3 years ago
7 0

Given is the ratio of conjugate base and conjugate acid of phosphoric acid. pH of a substance is the concentration of the hydrogen ions in its solution and higher this concentration lower is the value of pH.

pKa value is a measure of the strength of acid, it is the negative log of acid dissociation constant Ka.

You might be interested in
Find the mass of an object that has a density of 1.5 g/cm3 and has a volume of 8cm3
zubka84 [21]

Answer:

density= 1.5 g/cm3

volume= 8cm 3

mass = density×volume

mass= 1.5×8

= 12 g

7 0
3 years ago
Hydrofluoric acid, hf, has a ka of 6.8 × 10−4. what are [h3o+], [f−], and [oh−] in 0.710 m hf?
STALIN [3.7K]

Answer:

[H₃O⁺] = [F⁻] = 2.2 x 10⁻² M. & [OH⁻] = 4.55 x 10⁻¹³.

Explanation:

  • For a weak acid like HF, the dissociation of HF will be:

<em>HF + H₂O ⇄ H₃O⁺ + F⁻.</em>

[H₃O⁺] = [F⁻].

<em>∵ [H₃O⁺] = √Ka.C,</em>

Ka = 6.8 x 10⁻⁴, C = 0.710 M.

∴ [H₃O⁺] = √Ka.C = √(6.8 x 10⁻⁴)(0.710) = 2.197 x 10⁻² M ≅ 2.2 x 10⁻² M.

<em>∴ [H₃O⁺] = [F⁻] = 2.2 x 10⁻² M.</em>

<em></em>

∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

<em>∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺]</em> = 10⁻¹⁴/(2.2 x 10⁻²) = <em>4.55 x 10⁻¹³.</em>

6 0
3 years ago
What is the oxidizing agent in galvanic cell?
ipn [44]
The ion in the cathode that gains electrons
7 0
3 years ago
What is the displacement of the particle in the time interval 7 seconds to 8 seconds?
3241004551 [841]

Answer:

28 is great.......... it should be snSwer

8 0
3 years ago
The table below shows the content in mg of some chemical elements found in 100g of milk:
garri49 [273]

Answer:

... chloride, calcium, potassium, and zinc was signifi- ... of cow and goat milk pasteurization on element retention ... certified American Chemical Society (ACS);. Whatman ... goat milk. Table 2 gives the content of 17 elements of ... found .0026 rag/100 g in raw and .0024 mg/100 ... mg/100 g chloride content (27) and another.

5 0
3 years ago
Other questions:
  • Light waves come in different wavelengths and frequencies. The color of the light we see is dependent on wavelength. When we see
    9·1 answer
  • How much energy is required to raise the temperature of 3 kg of aluminum
    9·1 answer
  • How does water affect the melting temperature of rock?
    15·1 answer
  • A compound's molecular formula must always be different than the compound's empirical formula. TRUE FALSE
    11·1 answer
  • Phenomenon: If an astronaut throws a wrench in outer space with no other forces acting on it, the wrench will continue moving fo
    12·2 answers
  • 3. ¿Cuál de las siguientes operaciones es correcta para calcular el número de moles de hidrógeno necesarios para producir 6 mole
    14·1 answer
  • La valencia que utiliza el hidrógeno al formar un hidruro metálico es
    15·1 answer
  • Which of the following solutions of glucose in water will have the lowest freezing point?
    11·1 answer
  • Why could the amount of available freshwater decrease in an area?
    13·1 answer
  • If 0.62 moles of KClO3 is decomposed, how many grams of O2 are produced?<br><br> 2KClO3 → 2KCl + 3O2
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!