If it's for study island it's A.The effect is unpredictable because the ice changes two variables at the same time.
<u>Answer:</u> The ratio of number of hydroxide ions to iodide ions is 2 : 1.
<u>Explanation:</u>
The chemical equation for the oxidation of iodide ion is oxidized to hypoiodite ion by permanganate follows:
![2MnO_4^-+I^-+H_2O\rightarrow 2MnO_2(s)+IO_3^{-}+2OH^{-}](https://tex.z-dn.net/?f=2MnO_4%5E-%2BI%5E-%2BH_2O%5Crightarrow%202MnO_2%28s%29%2BIO_3%5E%7B-%7D%2B2OH%5E%7B-%7D)
According to mole concept:
1 mole of a substance contains
number of particles
Moles of iodide ions = 1 mole
Number of iodide ions = ![(1\times 6.022\times 10^{23}](https://tex.z-dn.net/?f=%281%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D)
Moles of hydroxide ions = 2 mole
Number of hydroxide ions = ![(2\times 6.022\times 10^{23}](https://tex.z-dn.net/?f=%282%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D)
Taking the ratio of number of hydroxide ions and number of iodide ions are as follows:
![\frac{\text{Number of hydroxide ions}}{\text{Number of iodide ions}}=\frac{(2\times 6.022\times 10^{23})}{(1\times 6.022\times 10^{23})}\\\\\frac{\text{Number of hydroxide ions}}{\text{Number of iodide ions}}=\frac{2}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BNumber%20of%20hydroxide%20ions%7D%7D%7B%5Ctext%7BNumber%20of%20iodide%20ions%7D%7D%3D%5Cfrac%7B%282%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D%29%7D%7B%281%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D%29%7D%5C%5C%5C%5C%5Cfrac%7B%5Ctext%7BNumber%20of%20hydroxide%20ions%7D%7D%7B%5Ctext%7BNumber%20of%20iodide%20ions%7D%7D%3D%5Cfrac%7B2%7D%7B1%7D)
Hence, the ratio of number of hydroxide ions to iodide ions is 2 : 1.
(D) F because it has the highest electronegativity
Answer:
To help evenly distribute heat throughout the solution
Explanation:
The purpose of stirring a solution while being heated would be<u> to evenly distribute heat throughout the solution.</u>
<em>When a vessel containing a solution is heated, the molecules at the lower portion of the vessel get heated first before heat graduate radiates around the entire solution. Stirring the solution will ensure that the process of heat distribution around the entire solution is quickened.</em>
Stirring a solution while heating does not slow down the reactions that might occur in the solution, does not encourage sudden boiling of the solution, and neither does it prevent solute from dissolving into the solution.