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
nekit [7.7K]
3 years ago
12

Acetic acid is a weak acid with a pKa of 4.76. What is the concentration of acetate in a buffer solution of 0.2M at pH 4.9. Give

your answer in M but as a numeral only to 2 decimal places.
Chemistry
1 answer:
Ghella [55]3 years ago
6 0

Answer:

[base]=0.28M

Explanation:

Hello,

In this case, by using the Henderson-Hasselbach equation one can compute the concentration of acetate, which acts as the base, as shown below:

pH=pKa+log(\frac{[base]}{[acid]} )\\\\\frac{[base]}{[acid]}=10^{pH-pKa}\\\\\frac{[base]}{[acid]}=10^{4.9-4.76}\\\\\frac{[base]}{[acid]}=1.38\\\\

[base]=1.38[acid]=1.38*0.20M=0.28M

Regards.

You might be interested in
Where does regional metamorphism usually occur ?
Alex Ar [27]

Answer:

Regional metamorphic rocks form from other rocks (protoliths) by changes in mineralogy and texture in response to changing physical conditions (temperature, lithostatic pressure, and, in most cases, shear stress). Regional metamorphism occurs over broad areas in the lithosphere, possibly influenced by the heat supply. Regional metamorphic rock results from regional metamorphism and usually develops a flaky texture.  These changes are essentially solid-state reactions, but very often a fluid phase is present, either participating in the reaction or as a reaction medium. Many regional metamorphic rocks have a chemical composition that is very similar to that of their sedimentary or igneous precursors, with the exception of removal or addition of volatiles (mainly H2O and CO2). This type of behavior is termed isochemical metamorphism. Metamorphism may also take place as a result of a change in chemical environment; this may occur by transport of elements between chemically contrasting rock types (e.g., formation of calc-silicate minerals at a quartzite–marble contact) or by circulation of fluids that dissolve some substances and precipitate others. This process of significant chemical change during metamorphism is known as allo-chemical metamorphism or metasomatism, and rocks formed in this manner are metasomatic rocks. Metasomatism is, however, mostly of local significance, and the total volume of metasomatic rocks in regional metamorphic terranes is rather minor. The distinction between metasomatism and is chemical metamorphism is also a matter of scale. On the scale of individual grains, mass transport takes place during all phase transformations; on the scale of a thin section, it is probably the rule for regional metamorphism; on the scale of a hand (sized) specimen, it can be observed frequently; and on a larger scale, it is the exception.

Hope this Helps!

3 0
3 years ago
When hydrogen gas is bubbled into 2-butyne, the product is
kolbaska11 [484]

Answer:

On treatement of 2 -with hydrogen gas and lindlar catalyst, the major product obtained is cis-2butene.

3 0
1 year ago
If I mix bleach and namona and throw it on a person what will happen​
satela [25.4K]

Answer:

They have the chance to inhale toxic fumes secreted by the mixture.

Explanation:

7 0
3 years ago
If 400 Joules of work is done in 20 seconds, how much power was generated?
Sonbull [250]
To work this out you do 400÷20=20
5 0
3 years ago
Balance the chemical equations.<br> 1FeCl3 + KOH → Fe(OH)3 + KC1
wariber [46]

Answer:

FeCl3 + 3KOH → Fe(OH)3 + 3KCl

Explanation:

3 0
3 years ago
Other questions:
  • During science lab, Carl notices that when he adds water to his solid sample of anhydrous copper
    11·1 answer
  • Chose the statements that are TRUE from the list below Group of answer choices Ions exist alone in nature Lactate is created by
    11·1 answer
  • What type of silicate minerals is shown from this arrangement of silicon tetrahedron?
    11·2 answers
  • An atom is determined to contain 12 protons, 10 electrons, and 12 neutrons. What are the mass number and charge of this atom or
    14·1 answer
  • How does warm water at the surface of the ocean<br> become colder?
    11·1 answer
  • 2) Os foguetes são utilizados para levar pessoas ao espaço (os astronautas), mas principalmente cargas como, por exemplo, os sat
    7·1 answer
  • How much does 200 gallons of water weigh?
    9·1 answer
  • Which equation shows conservation of charge
    6·2 answers
  • Lewis diagram of Ozone
    7·1 answer
  • How can criteria be used to help define the problem?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!