For this problem, we have to calculate the pH when 49.5 mL of 0.335 M NaA is mixed with 30.6 mL of 0.120 M HCl.
NaA (aq) + HCl (aq) → HA (aq) + NaCl (aq)
Step 1. Find the moles of A- and H+ from HCl
Step 2. Construct an ICF chart
Step 3. Calculate the pH
(1) Moles of A- will be calculated as:
Calculate the pH of a solution made by mixing 49.5 mL of 0.335 M NaA (Ka for HA = 1.0 × 10–9) with 30.6 mL of 0.120 M HCl.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Weak Base Strong Acid Titrations concept. You can view video lessons to learn Weak Base Strong Acid Titrations. Or if you need more Weak Base Strong Acid Titrations practice, you can also practice Weak Base Strong Acid Titrations practice problems.