250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after the complete reaction is . Find out (Nearest integer).

Question

250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after the complete reaction is . Find out  (Nearest integer).

Canvas Classes · Accepted Answer

Step 1 — Moles of each reactant:

Step 2 — Neutralisation reaction:

NaOH is limiting reagent.

HCl consumed = 0.125 mol

Step 3 — Unreacted HCl:

Step 4 — Number of molecules:

Answer: 226

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