The answer would be, "Today is cloudy, but tomorrow will be clear and sunny." The rest are examples of climate change, which is spanned over 30+ years, weather is on a day-to-day basis
Any colloid consisting of a solid dispersed in a gas is called a smoke. A liquid dispersed in a gas is referred to as a fog. So the answer would be smoke
<u>Answer:</u> The correct answer is ![3Ag^+(aq.)+Cr(s)\rightarrow 3Ag(s)+Cr^{3+}(aq.);E^o_{cell}=+1.53V](https://tex.z-dn.net/?f=3Ag%5E%2B%28aq.%29%2BCr%28s%29%5Crightarrow%203Ag%28s%29%2BCr%5E%7B3%2B%7D%28aq.%29%3BE%5Eo_%7Bcell%7D%3D%2B1.53V)
<u>Explanation:</u>
We are given:
![Cr^{3+}(aq.)+3e^-\rightarrow Cr(s);E^o=-0.73V\\\\Ag^+(aq.)+e^-\rightarrow Ag(s);E^o=+0.80V](https://tex.z-dn.net/?f=Cr%5E%7B3%2B%7D%28aq.%29%2B3e%5E-%5Crightarrow%20Cr%28s%29%3BE%5Eo%3D-0.73V%5C%5C%5C%5CAg%5E%2B%28aq.%29%2Be%5E-%5Crightarrow%20Ag%28s%29%3BE%5Eo%3D%2B0.80V)
The substance having highest positive
potential will always get reduced and will undergo reduction reaction. Here, silver will always undergo reduction reaction will get reduced.
Chromium will undergo oxidation reaction and will get oxidized.
The half reactions for the above cell is:
Oxidation half reaction: ![Cr(s)\rightarrow Cr^{3+}+3e^-;E^o_{Cr^{3+}/Cr}=-0.73V](https://tex.z-dn.net/?f=Cr%28s%29%5Crightarrow%20Cr%5E%7B3%2B%7D%2B3e%5E-%3BE%5Eo_%7BCr%5E%7B3%2B%7D%2FCr%7D%3D-0.73V)
Reduction half reaction:
( × 3)
Net equation: ![3Ag^+(aq.)+Cr(s)\rightarrow 3Ag(s)+Cr^{3+}(aq.)](https://tex.z-dn.net/?f=3Ag%5E%2B%28aq.%29%2BCr%28s%29%5Crightarrow%203Ag%28s%29%2BCr%5E%7B3%2B%7D%28aq.%29)
Oxidation reaction occurs at anode and reduction reaction occurs at cathode.
To calculate the
of the reaction, we use the equation:
![E^o_{cell}=E^o_{cathode}-E^o_{anode}](https://tex.z-dn.net/?f=E%5Eo_%7Bcell%7D%3DE%5Eo_%7Bcathode%7D-E%5Eo_%7Banode%7D)
Putting values in above equation, we get:
![E^o_{cell}=0.80-(-0.73)=1.53V](https://tex.z-dn.net/?f=E%5Eo_%7Bcell%7D%3D0.80-%28-0.73%29%3D1.53V)
Hence, the correct answer is ![3Ag^+(aq.)+Cr(s)\rightarrow 3Ag(s)+Cr^{3+}(aq.);E^o_{cell}=+1.53V](https://tex.z-dn.net/?f=3Ag%5E%2B%28aq.%29%2BCr%28s%29%5Crightarrow%203Ag%28s%29%2BCr%5E%7B3%2B%7D%28aq.%29%3BE%5Eo_%7Bcell%7D%3D%2B1.53V)