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Answer:
pH of buffer with HOAc/OAc Ratio of 10/12 => 3.97
Explanation:
Given HOAc/OAc⁻ buffer with 10:12 acid to salt ratio;
Ka (HOAc) = 1.8 x 10⁻⁵
pKa (HOAc) = -log(Ka) = -log(1.8 x 10⁻⁵) = 4.75 ~ 4.8
Use Henderson-Hasselbalch equation => pH = pKa - log [base]/[acid])
=> pH = 4.75 - log (10/12) = 4.8 - 0.83 = 3.97*
*closest answer to 3.97 is pH = 3.8
When pH of buffer with HOAc/OAc Ratio of 10/12 => 3.97 or 3.8
The correct option 'D'
What is inhibition is caused by ethanol?
Now Given that HOAc/OAc⁻ buffer with 10:12 acid to salt ratio;
Then Ka (HOAc) = 1.8 x 10⁻⁵
After that pKa (HOAc) = -log(Ka) = -log(1.8 x 10⁻⁵) = 4.75 ~ 4.8
When Use Henderson-Hasselbalch equation => pH = pKa - log [base]/[acid])
Therefore, => pH = 4.75 - log (10/12) = 4.8 - 0.83 = 3.97* or 3.8
* The correct option is D 3.97 is pH = 3.8
The weighty metal ions are noncompetitive inhibitors and also Ethanol is a competitive inhibitor.
1) non-specific inhibitors: this is some chemical or physical transformation that ultimately denatures the protein of the enzyme. therefore enzyme activity is lost permanently and this type of inhibition is irreversible inhibition. For e.g Temperature, acid-base
Temperature increases the rate of reaction typically but for enzymes, there is a point after which reaction rate decreases with increasing temperature. At elevated temperature, the protein is denatured and also enzyme activity is inhibited
When the Enzyme activity is controlled by the pH of the medium. when pH changes, Then the shape of the amino acid is changed. therefore enzyme activity is inhibited
Heavy metal ions are irreversible and non-competitive inhibitors. these ions are connected to sites of the enzyme other than active sites. therefore changing the shape of the enzyme and also inhibiting the enzyme activity
Ethanol is a competitive inhibitor. these inhibitors glimpse almost similar to the actual substrate and they are stuck to the active site of the enzyme and do not let substrates respond to the enzyme. therefore enzyme activity is inhibited.
Find more information about inhibition is caused by ethanol here:
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