Question

Which of the following statements best compares the pH value of H3PO4 and HCl?

A.) Both have a pH less than 7, but H3PO4 has a higher pH than HCl.
B.) Both have a pH less than 7, but H3PO4 has a lower pH than HCl.
C.) Both have a pH greater than 7, but H3PO4 has a higher pH than HCl.
D.) Both have a pH greater than 7, but H3PO4 has a lower pH than HCl.

Answer 1

A) Both have a pH less than 7, but H3PO4 has a higher pH than HCl.

Step-by-step explanation:

I think

Answer 2

Option B. Both have a pH less than 7, but H3PO4 has a lower pH than HCl

Step-by-step explanation:

Those are acid, so the pH would be < 7.

H₃PO₄ is a weak acid with 3 dissociations

HCl is a strong acid.

pH depends on [H]⁺

H₃PO₄ → 3H⁺ + PO₄⁻³

HCl → H⁺ + Cl⁻

If both acid, have the same concentration, [H⁺]H₃PO₄ > [H⁺]HCl, that's why the pH from the phosphoric will be lower.