Plz need answer 20 complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 020 pts

The lower the hydrogen ion concentration, the higher the pH.  

Step-by-step explanation:

This effect comes from the definition of pH:

pH = -log[H₃O⁺]

Consider two solutions.

Solution A has [H₃O⁺] = 10⁻¹ mol·L⁻¹; Solution B has [H₃O⁺] = 10⁻¹⁰ mol·L⁻¹.

Solution B has the lower [H₃O⁺].

Now, take the logarithm of each concentration.

Solution A: log[H₃O⁺] = log10⁻¹ = -1; Solution B: log[H₃O⁺] = log10⁻¹⁰ = -10

Solution B still has the lower value.

However, pH is the negative logarithm.

When we take negative logarithms, we get

Solution A: pH = 1; Solution B: pH = 10

Solution B has the lower [H₃O⁺], but the higher pH.

The lower the hydrogen ion concentration, the higher the pH.  

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