Urmmm??????? What is the question
The dissociation constant is 2.44 mM.
<u>Explanation:</u>
Dissociation constant of any acid or any kind of solutions is the measure of amount dissolved in the solution or separated into different elements. So it is calculated as the ratio of product of concentration of dissociated elements to the concentration of the original compound.
Here the concentration of the acid [HA] = 0.035 M, the pH of the acid is given as 4.67.
![pH=-log[H^{+}]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%7B%2B%7D%5D)
![[H^{+}]=e^{-pH} = \frac{1}{e^{pH} } = \frac{1}{e^{4.67} } =\frac{1}{107}](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3De%5E%7B-pH%7D%20%3D%20%5Cfrac%7B1%7D%7Be%5E%7BpH%7D%20%7D%20%3D%20%5Cfrac%7B1%7D%7Be%5E%7B4.67%7D%20%7D%20%3D%5Cfrac%7B1%7D%7B107%7D)
![[H^{+}]=9.35 \times 10^{-3} M](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3D9.35%20%5Ctimes%2010%5E%7B-3%7D%20%20M)
Then, ![K_{a} =\frac{[H^{+}][A^{-}] }{[HA]} =\frac{(9.35 \times 10^{-3}) ^{2} }{0.035}\\ \\K_{a} = 2497.78 \times 10^{-6}](https://tex.z-dn.net/?f=K_%7Ba%7D%20%3D%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5BA%5E%7B-%7D%5D%20%7D%7B%5BHA%5D%7D%20%3D%5Cfrac%7B%289.35%20%5Ctimes%2010%5E%7B-3%7D%29%20%5E%7B2%7D%20%7D%7B0.035%7D%5C%5C%20%5C%5CK_%7Ba%7D%20%3D%202497.78%20%5Ctimes%2010%5E%7B-6%7D)
Thus, the dissociation constant is 2.44 mM.
Answer:
a. first-order in both A and B.
Explanation:
In order to determine the kinetics of reaction let us consider the given data
a) Doubling the concentration of B while keeping the concentration of A fixed doubles the rate of the reaction. : it means the reaction is first order reaction with respect to reactant B.
b) The half life is the time required to complete the reaction by half way.
As with time one half of A remains and after equal time one fourth of A remains it means again the order of reaction is first with respect to A also.
There is no effect on the half life if we are decreasing the initial concentration of A also.
Answer:
- I would say the 2nd one It helps growth and repair of cells of orgasms
- But your school would probably say the 3rd one It helps remove toxins from the body to maintain homeostasis
Explanation:
2. Our cells produce a lot of waste that must be eliminated (excreted) from the body. These residues are called excreta. The residues formed from the chemical reactions that take place inside the cells can be eliminated through:
• of the respiratory system (carbon dioxide)
• skin (sweat)
urinary system (urine)
Our cells expel these substances to maintain the dynamic balance (homeostasis) of our body and promote our well-being.
8 kilometer? is that right or explain to me pls.
