Answer:
When two clear aqueous solutions react, they sometimes form solids in the solution. The solid is called a precipitate. Precipitation reactions occur when the cations of one reactant and the anions of a second reactant found in aqueous solutions combine to form an insoluble ionic solid that we call a precipitate.
Explanation:
An aqueous solution in a 55 gallon (208 l drum), characterized by minimal buffering capacity, received 4kg of phenol and 1.5 kg of sodium phenate. What is the ph of the solution. The pka of phenol = 9.98. Mw of phenol and sodium phenate are 94 g/mol and 116 g/mol, respectively.
Volume of solution = 55 gallons = 208.2 L [ 1 gallon = 3.78 L]
moles of phenol = mass / molar mass = 4000 g / 94 = 42.55 moles
moles of sodium phenate = mass / molar mass = 1500 / 116 = 12.93 moles
pKa of phenol = 9.98
We know that the pH of buffer is calculated using Hendersen Hassalbalch's equation
pH = pKa + log [salt] / [acid]
volume is same for both the sodium phenate and phenol has we can directly take the moles of each in the formula
pH = 9.98 + log [12.93 / 42.55] = 9.46
Answer:
They attract each other
Explanation:
A magnet has two poles;
North pole and south pole
When two opposite poles are placed close to each other, they attract each other. The short rule is opposite opes attract.
When two like poles are placed close to each other, they repel each other. The short rule is like poles repel.
36% amount of radiolabeled proline can be expected in the translated polypeptides if a cell-free translation experiment like Nirenberg and Matthaei is performed.
<h3 /><h3>
What do you mean by Radiolabeling? </h3>
Any combination of radioactive material and a chemical. A common technique in pharmaceutical research and development for tracking specific molecules and compounds is radiolabeling. It resembles carbon dating, a more well-known method for determining the age of organic substances based on how quickly carbon decomposes. Additionally, radiolabeling is a method used to follow a radioisotope-containing molecule as it moves through a biological system, metabolic pathway, cell, tissue, or organism. Specific atoms are "tagged" by substituting their isotopes in the reactant.
To learn more about Radiolabeling, visit:
brainly.com/question/15857309
#SPJ4
Because their atoms have the same number of electrons in the highest occupied energy level