Answer:
The level of hydrogen ion has increased by a factor of 10.
Explanation:
We know, ![pH=-log[H^{+}]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%7B%2B%7D%5D)
where ![[H^{+}]](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D)
represents concentration of 
in molarity
Here 
So, ![[H^{+}]_{final}=10^{-6.5}M](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D_%7Bfinal%7D%3D10%5E%7B-6.5%7DM)
Here 
So, ![[H^{+}]_{initial}=10^{-7.5}M](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D_%7Binitial%7D%3D10%5E%7B-7.5%7DM)
Hence, change in pH = ![\frac{[H^{+}]_{final}}{[H^{+}]_{initial}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5BH%5E%7B%2B%7D%5D_%7Bfinal%7D%7D%7B%5BH%5E%7B%2B%7D%5D_%7Binitial%7D%7D)
= 
So, the level of hydrogen ion has increased by a factor of 10.
Option (B) is correct
The chemical could have more or less of a reaction to the other chemicals in the experiment
<span>8Fe + S8 --> 8FeS
it is </span>
<span>A) synthesis
proof
A +B----->AB
reactants product
it is </span><span>chemical synthesis reaction</span>
It Called a Unsaturated I hope this helped
