Answer:
The ionization equation is
⇄
(1)
Explanation:
The ionization equation is
⇄ (1)
As the Bronsted definition sais, an acid is a substance with the ability to give protons thus, H2PO4 is the acid and HPO42- is the conjugate base.
The Ka expression is the ratio between the concentration of products and reactants of the equilibrium reaction so,
![Ka = \frac{[HPO_{4}^{-2}] [H_{3}O^{+}]}{[H_{2}PO_{4}^{-}] [H_{2}O]} = 6.2x10^{-8}](https://tex.z-dn.net/?f=Ka%20%3D%20%5Cfrac%7B%5BHPO_%7B4%7D%5E%7B-2%7D%5D%20%5BH_%7B3%7DO%5E%7B%2B%7D%5D%7D%7B%5BH_%7B2%7DPO_%7B4%7D%5E%7B-%7D%5D%20%5BH_%7B2%7DO%5D%7D%20%3D%206.2x10%5E%7B-8%7D)
The pKa is
The pKa of H2CO3 is 6,35, thus this a stronger acid than H2PO4. The higher the pKa of an acid greater the capacity to donate protons.
In the body H2CO3 is a more optimal buffer for regulating pH due to the combination of the two acid-base equilibriums and the two pKa.
If the urine is acidified, according to Le Chatlier's Principle the equilibrium (1) moves to the left neutralizing the excess proton concentration.
Answer:
116.1 a.m.u.
It is not likely that RCOOH is the pentanoic acid
Explanation:
Let's consider the generic neutralization between NaOH and a monoprotic carboxylic acid.
RCOOH(aq) + NaOH(aq) ⇒ RCOONa(aq) + H₂O(l)
The molar ratio of RCOOH to NaOH is 1:1. The moles of RCOOH are:
The molar mass of RCOOH is:
Thus, the molecular weight is 116.1 a.m.u.
Pentanoic acid has the formula C₅H₁₀O₂ with a molecular weight of 102.1 a.m.u. So, it is not likely that RCOOH is the pentanoic acid.
Conversion factor, 1 gallon = 4546.09 ml
Volume of stock solution = 1 gallon or 4546.09 ml
Dose required by the child = 5 ml/day
The number of days a gallon of this medicine last,
4546.09 ml x 1 day/ 5 ml = 909.218 days
Therefore, 1 gallon would last 909 days.
Answer: Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A mixture is composed of different types of atoms or molecules that are not chemically bonded.
Explanation:
