Given the reaction below which of the following best describes the energy changes in this reaction? Cu + Cl2 + energy —> CuCl2

first choice

Explanation:

energy is written on the left side is its absorbed

2 elements came together so bonds are formed.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

they are all solids.