Which of the following molecules would not change the pH of an unbuffered solution?ANSWERNaOHHClNaClH2SO4

The molecule that would not change the pH of an unbuffered solution is NaCl.

Here's why:

1. NaOH is a strong base, which means it dissociates completely in water to form Na+ and OH- ions. The OH- ions increase the pH of the solution, making it more basic.

2. HCl is a strong acid, which means it also dissociates completely in water to form H+ and Cl- ions. The H+ ions decrease the pH of the solution, making it more acidic.

3. H2SO4 is a strong acid as well, and it dissociates in water to form 2H+ and SO4^2- ions. The H+ ions, again, decrease the pH of the solution, making it more acidic.

4. NaCl, on the other hand, is a salt formed from a strong acid (HCl) and a strong base (NaOH). When it dissolves in water, it forms Na+ and Cl- ions, neither of which react with water to form H+ or OH- ions. Therefore, NaCl does not change the pH of the solution.