Exothermic type of reaction is taking place because this type of reaction generates heat energy.
<h3>What is exothermic reaction?</h3>
Exothermic reactions refer to those chemical reactions that produce heat energy and release that heat energy to the surrounding environment.
So we can conclude that exothermic type of reaction is taking place because this type of reaction generates heat energy.
Learn more about reaction here: brainly.com/question/26018275
Q= mass•specific heat•change temp. 5.43=m•4.184•(202-32) M=7.63grams
Answer:
pH = 10.11
Explanation:
Hello there!
In this case, since it is possible to realize that this base is able to acquire one hydrogen atom from the water:
![C_{18}H_{21}NO_4+H_2O\rightleftharpoons C_{18}H_{21}NO_4H^+OH^-](https://tex.z-dn.net/?f=C_%7B18%7DH_%7B21%7DNO_4%2BH_2O%5Crightleftharpoons%20C_%7B18%7DH_%7B21%7DNO_4H%5E%2BOH%5E-)
We can therefore set up the corresponding equilibrium expression:
![Kb=\frac{[C_{18}H_{21}NO_4H^+][OH^-]}{[C_{18}H_{21}NO_4]}](https://tex.z-dn.net/?f=Kb%3D%5Cfrac%7B%5BC_%7B18%7DH_%7B21%7DNO_4H%5E%2B%5D%5BOH%5E-%5D%7D%7B%5BC_%7B18%7DH_%7B21%7DNO_4%5D%7D)
Which can be written in terms of the reaction extent,
:
![Kb=\frac{x^2}{0.00500M-x}=3.39x10^{-6}](https://tex.z-dn.net/?f=Kb%3D%5Cfrac%7Bx%5E2%7D%7B0.00500M-x%7D%3D3.39x10%5E%7B-6%7D)
Thus, by solving for
we obtain:
![x_1=-0.000132M\\\\x_2=0.0001285M](https://tex.z-dn.net/?f=x_1%3D-0.000132M%5C%5C%5C%5Cx_2%3D0.0001285M)
However, since negative solutions are now allowed, we infer the correct
is 0.0001285 M; thus, the pOH can be computed:
![pOH=-log(x)=-log(0.0001285)=3.89](https://tex.z-dn.net/?f=pOH%3D-log%28x%29%3D-log%280.0001285%29%3D3.89)
And finally the pH:
![pH=14-pOH=14-3.89\\\\pH=10.11](https://tex.z-dn.net/?f=pH%3D14-pOH%3D14-3.89%5C%5C%5C%5CpH%3D10.11)
Best regards!