<span>The substance that is produced at the cathode during the electrolysis of a mixture of molten calcium bromide, cabr2(I), and molten magnesium iodide, mgi2(I), can be expressed as Ca2+ + 2eâ’ --> Ca. At the anode, the substance can be expressed as 2Brâ’ â’ 2eâ’ --> Br2. At the cathode for magnesium iodide can be expressed as Mg2+ + 2 eâ’ --> Mg, and 2 Iâ’ â’ 2 eâ’ --> I2 at the anode.</span>
Answer:
PART A 1st order in A and 0th order in B
Part B The reaction rate increases
Explanation:
<u>PART A
</u>
The rate law of the arbitrary chemical reaction is given by
![-r_A=k\times\left[A\right]^\alpha\times\left[B\right]^\beta\bigm](https://tex.z-dn.net/?f=-r_A%3Dk%5Ctimes%5Cleft%5BA%5Cright%5D%5E%5Calpha%5Ctimes%5Cleft%5BB%5Cright%5D%5E%5Cbeta%5Cbigm)
Replacing for the data
Expression 1 
Expression 2 
Expression 3 
Making the quotient between the fist two expressions
Then the expression for 
Doing the same between the expressions 1 and 3
Then
This means that the reaction is 1st order respect to A and 0th order respect to B
.
<u>PART B
</u>
By the molecular kinetics theory, if an increment in the temperature occurs, the molecules will have greater kinetic energy and, consequently, will move faster. Thus, the possibility of colliding with another molecule increases. These collisions are necessary for the reaction. Therefore, an increase in temperature necessarily produces an increase in the reaction rate.
Gravity. The rock is being pushed down and you are counteracting that force with a crowbar pushing it upward.
Explanation:
The speed of molecules increases when temperature is increased as it will result in more number of collisions between the molecules. Thus, there will be increase in kinetic energy of molecules and increase in the speed of solvent molecules.
Whereas on decreasing the temperature, the kinetic energy of molecules will decrease. This will result in less number of collisions between the molecules. Therefore, the speed of solvent molecules will slow down.
D is a scintillation counter.
