Answer:
is dissociation constant and the value of 
is 4.98.
Explanation:
The pH of the solution = 2.95 M
![pH=-\log[H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH%5E%2B%5D)
![2.95=-\log[H^+]](https://tex.z-dn.net/?f=2.95%3D-%5Clog%5BH%5E%2B%5D)
![[H^+]=10^{-2.95}=0.001122 M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D10%5E%7B-2.95%7D%3D0.001122%20M)
..[1]
Concentration of unknown monoprotic acid = C = 0.1224 M
Initially
C 0 0
At equilibrium
(C-x) x x
The expression of a dissociation reaction can be written as;
![K_a=\frac{[A^-][H^+]}{[HA]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BA%5E-%5D%5BH%5E%2B%5D%7D%7B%5BHA%5D%7D)
![[H^+]=x =0.001122 M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3Dx%20%3D0.001122%20M)
( from [1])
The value of :
![pK_a=-\log[K_a]](https://tex.z-dn.net/?f=pK_a%3D-%5Clog%5BK_a%5D)
![=-\log[1.038\times 10^{-5}]=4.98](https://tex.z-dn.net/?f=%3D-%5Clog%5B1.038%5Ctimes%2010%5E%7B-5%7D%5D%3D4.98)
is dissociation constant and the value of is 4.98.
Answer:
It raises the boiling point and lowers the freezing point.
Explanation:
It is used as antifreeze in the cooling circuits of internal combustion engines, that is, it is used to reduce the melting point of the solution.
By adding ethylene glycol I'm not only bringing the melting point to -13°C, but the boiling point of ethylene glycol is 197°C.
since these substances not only lower the freezing point but also increase the boiling point, they are also called a colligative agent
Answer:
Nucleus
Explanation: it is the center of the atom, and contains protons and nuetrons
Answer:
A)The total number of protons plus neutrons= Weight of an atom
A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape. ... (a) Solid O2 has a fixed volume and shape, and the molecules are packed tightly together.
Also I need brainlest please
