======Performing a Titration====== **Materials: **{{$demo.materials_description}}\\ **Difficulty: **{{$demo.difficulty_description}}\\ **Safety: **{{$demo.safety_description}}\\ \\ **Categories:** {{$demo.categories}} \\ **Alternative titles:** Acid–Base Titration Demonstration ====Summary==== {{$demo.summary}} ====Procedure==== - See instructions in the links below ====Links==== Setting up and Performing a Titration - Carolina Science: {{youtube>sFpFCPTDv2w?}}\\ đŸ“„ How to Perform a Titration - AACT: [[https://teachchemistry.org/classroom-resources/how-to-perform-a-titration]]\\ ====Variations==== * Compare indicators (phenolphthalein vs. bromothymol blue) for strong acid–strong base titrations. * Use a pH probe to create a titration curve and identify equivalence point without an indicator. * Explore weak acid–strong base (or weak base–strong acid) titrations and note the shifted equivalence pH. * Perform a back titration when the analyte reacts slowly or is insoluble. ====Safety Precautions==== * Wear splash goggles, lab coat/apron, and gloves at all times. * When diluting, always add acid to water (never water to acid). * Clamp the burette securely; keep the area dry and uncluttered to prevent slips and spills. * If acid/base contacts skin, rinse immediately with water and notify the instructor. * Neutralize and dispose of acidic/basic waste per local regulations; never return chemicals to stock bottles. * Read burette volumes at eye level to avoid parallax; handle glassware carefully to prevent breakage. ====Questions to Consider==== * Why do we choose different indicators for different titrations? (Each indicator changes color over a specific pH range; you select one whose transition range spans the expected equivalence pH.) * How is equivalence point different from endpoint? (Equivalence point is the stoichiometric point; endpoint is the observed signal - ideally they coincide but may differ slightly.) * Why add titrant dropwise near the endpoint? (Small additions prevent overshooting, improving accuracy.) * How does the balanced equation affect the calculation? (Polyprotic acids/bases require multiplying by the number of acidic hydrogens or hydroxides in the stoichiometry.)