Explanation:
We have given the acid that is, acetic acid. It is known that acetic acid is a weak acid.
Therefore, formula that depicts relationship between pH, 
and weak acid is as follows.
pH = + log![\frac{[A^{-}]}{[HA]}](https://tex.z-dn.net/?f=%5Cfrac%7B%5BA%5E%7B-%7D%5D%7D%7B%5BHA%5D%7D)
where, [HA] = concentration of weak acid
![[A^{-}]](https://tex.z-dn.net/?f=%5BA%5E%7B-%7D%5D)
= concentration of conjugate base of given weak acid
Since, we have to calculate the concentration of conjugate base of acetic acid. So, let it be equal to x. Whereas concentration of acetic acid is 10 mmol, is 4.74 and pH is 5.03.
Hence, putting these values in the above formula as follows.
pH = + log
5.03 = 4.74 + log
= antilog (0.29)
x = 19.4 mmol
Thus, we can conclude that there is 19.4 mmol acetate (the conjugate base of acetic acid) will be needed to add to this given solution.
Answer:
The answer to your question is below
Explanation:
Data
Stock solution concentration = 0.00190 M
Volume stock solution = 10 ml
Final volume = 100 ml
Standard solution concentration = ?
Absorbance of the standard solution = 0.62
Process
A) 0.00190 M it was given in the data
B) 0.62 it was given in the data
C) C1V1 = C2V2
C2 = C1V1/V2
C2 = (0.00190)(10)/100
C2 = 0.000190 M
D) Ratio = Absorbance/Concentration = 0.62/0.000190
= 3263.2
Answer:
D
Explanation:
Because speed is a scalar quantity which he has only magnitude and no direction while velocity is a vector quantity because it has both magnitude and direction.
Can you translate to english?
Answer: The correct answer is C.
Explanation: Hope this helps plz mark brainliest.
