Answer:
![Cp_{liquid}=2.54\frac{J}{g\°C}](https://tex.z-dn.net/?f=Cp_%7Bliquid%7D%3D2.54%5Cfrac%7BJ%7D%7Bg%5C%C2%B0C%7D)
Explanation:
Hello,
In this case, since silver is initially hot as it cools down, the heat it loses is gained by the liquid, which can be thermodynamically represented by:
![Q_{Ag}=-Q_{liquid}](https://tex.z-dn.net/?f=Q_%7BAg%7D%3D-Q_%7Bliquid%7D)
That in terms of the heat capacities, masses and temperature changes turns out:
![m_{Ag}Cp_{Ag}(T_2-T_{Ag})=-m_{liquid}Cp_{liquid}(T_2-T_{liquid})](https://tex.z-dn.net/?f=m_%7BAg%7DCp_%7BAg%7D%28T_2-T_%7BAg%7D%29%3D-m_%7Bliquid%7DCp_%7Bliquid%7D%28T_2-T_%7Bliquid%7D%29)
Since no phase change is happening. Thus, solving for the heat capacity of the liquid we obtain:
![Cp_{liquid}=\frac{m_{Ag}Cp_{Ag}(T_2-T_{Ag})}{-m_{liquid}(T_2-T_{liquid})} \\\\Cp_{liquid}=\frac{31.2g*0.237\frac{J}{g\°C}*(28.3-227.2)\°C}{185.8g*(28.3-24.4)\°C}\\ \\Cp_{liquid}=2.54\frac{J}{g\°C}](https://tex.z-dn.net/?f=Cp_%7Bliquid%7D%3D%5Cfrac%7Bm_%7BAg%7DCp_%7BAg%7D%28T_2-T_%7BAg%7D%29%7D%7B-m_%7Bliquid%7D%28T_2-T_%7Bliquid%7D%29%7D%20%5C%5C%5C%5CCp_%7Bliquid%7D%3D%5Cfrac%7B31.2g%2A0.237%5Cfrac%7BJ%7D%7Bg%5C%C2%B0C%7D%2A%2828.3-227.2%29%5C%C2%B0C%7D%7B185.8g%2A%2828.3-24.4%29%5C%C2%B0C%7D%5C%5C%20%5C%5CCp_%7Bliquid%7D%3D2.54%5Cfrac%7BJ%7D%7Bg%5C%C2%B0C%7D)
Best regards.
To know the acidity of a
solution, we calculate the pH value. The formula for pH is given as:
<span>pH = - log [H+] where H+ must be in Molar</span>
We are given that H+ = 3.25 × 10-2 M
Therefore the pH is:
pH = - log [3.25 × 10-2]
pH = 1.488
Since pH is way below 7, therefore the solution
is acidic.
To find for the OH- concentration, we must
remember that the product of H+ and OH- is equivalent to 10^-14. Therefore,
[H+]*[OH-] = 10^-14 <span>
</span>[OH-] = 10^-14 / [H+]
[OH-] = 10^-14 / 3.25 × 10-2
[OH-] = 3.08 × 10-13 M
Answers:
Acidic
[OH-] = 3.08 <span>× 10-13 M</span>
Answer : The atoms in this compound are Copper(Cu), Chlorine(Cl), Hydrogen(H), Oxygen(O).
Explanation :
The given compound is copper chloride bi-hydrate which is also called as copper (II) chloride dihydrate as it contains two water of crystallisation.
The formula of copper chloride bi-hydrate is
.
Therefore, there are 4 atoms in this compound and they are Copper(Cu), Chlorine(Cl), Hydrogen(H) and Oxygen(O).
Answer:
Correct option would be A. Mg(s) → Mg2+ + 2e-
Explanation:
Marked as correct answer on Quiz ;) (A P E X)
Answer:
- Volume is a physical property of an object.
- One unit of volume is the milliliter.
- Liquids and solids have constant volumes.
Explanation: