Answer:
Concentration of OH⁻:
1.0 × 10⁻⁹ M.
Explanation:
The following equilibrium goes on in aqueous solutions:
.
The equilibrium constant for this reaction is called the self-ionization constant of water:
.
Note that water isn't part of this constant.
The value of at 25 °C is . How to memorize this value?
- The pH of pure water at 25 °C is 7.
- However, for pure water.
- As a result, at 25 °C.
Back to this question. is given. 25 °C implies that . As a result,
.
Most elements on group 18 are the Noble Gases. They already have a complete last level with 8 electrones. Actually they can form compounds but only on the lab and they will not even last half a second.
Answer:
False
That is a chemical change
D. Model number 2
Hope this helps!! (: