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Titration: how much acid?
Find the exact volume of acid that neutralises 10 mL of base.
Topic: Equations and amountsGrade: 10Free
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What you do
- The burette holds 0.5 M hydrochloric acid. Open the tap and let about 8 mL run in. Swirl (Shake) now and then.
- Near the end, turn the tap to drop by drop. Close it as soon as the pink colour disappears and read the burette.
- Calculate: n(NaOH) = 0.5 × 0.010 = 0.005 mol, so you need 10 mL of 0.5 M HCl. Reach it without going past 10.4 mL.
- Calculate c(NaOH) from your end point: c = 0.5 × V(HCl) ÷ 10 mL (mol/L).
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