Which of the following statements about acids/bases is correct: Group of answer choices

1. molecule with a pH of 9 has a higherA concentration of H than water

2. A molecule with a pH of 10 has a higher concentration of OH - than water

3. A molecule with a pH of 12 has a lower concentration of OH - than water

4. A molecule with a pH of 4 has a higher concentration of OH - than water

2

Explanation:

To answer this correctly, we need to make a reference to the pH scale. Here we know that pH 1-6 stands for acidity where the smaller the value, the higher the concentration of H3O + and the higher the acidity. Also, pH 7 stands for neutral, there is an interpreted balance here, where the concentrations are averagely equal. Also, we have pH 8 to 14 where we have the alkalinity, the higher the value the higher the concentration of OH-.

Now let's solve the question at hand.

1 is wrong

Water is termed neutral with an average balance of the two ions. pH 9 means higher OH - which stipulates lesser H + than water.

2 is correct

The pH is termed alkaline and has more hydroxide concentration than water.

3 is wrong

It should have a higher concentration of OH - than water

4 is wrong

It should have a higher acidity and lesser alkalinity. This translates to higher H + and lower OH - relative to water