How many hydrogen ions are there per 10,000,000 undissociated water molecules
To determine the number of hydrogen ions per 10,000,000 undissociated water molecules, we need to understand the dissociation of water and the concept of pH.
Water can undergo a process called autoionization or self-ionization, where a small proportion of water molecules dissociate into hydrogen ions (H+) and hydroxide ions (OH-).
The balanced equation for the autoionization of water is:
2 H2O ⇌ H3O+ + OH-
In pure water at room temperature, the concentration of hydrogen ions (H+) and hydroxide ions (OH-) is the same, and both are in equilibrium. The concentration of each ion is very small, around 1 × 10^-7 mol/L. This is known as the neutral pH of water.
Now, let's calculate the number of hydrogen ions per 10,000,000 undissociated water molecules:
1. The Avogadro's number tells us that there are approximately 6.022 × 10^23 molecules in a mole.
2. So, to find the number of undissociated water molecules in 10,000,000 water molecules, we need to perform the following calculation:
Number of undissociated water molecules = (10,000,000) / (6.022 × 10^23)
3. Next, we need to consider that only a small proportion of water molecules dissociate, and the concentration of hydrogen ions and hydroxide ions are equal at 1 × 10^-7 mol/L.
Number of hydrogen ions per 10,000,000 undissociated water molecules = (Number of undissociated water molecules) × (1 × 10^-7 mol/L)
By performing these calculations, you can determine the number of hydrogen ions per 10,000,000 undissociated water molecules.