200 mL of 0.01 M HCl is mixed with 400 mL of 0.01 M . The pH of the mixture is

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Canvas Classes · Accepted Answer

Step 1 — Moles of :

From HCl (strong acid, monobasic):

From  (strong acid, dibasic):

Step 2 — Total :

Total volume = 200 + 400 = 600 mL = 0.6 L

Step 3 — pH:

Answer: Option (2) — pH = 1.78

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