Materials Unknown Solution Of Unknown Concentration Ca 80 Ml 0 10 M Hydrochloric Acid Ca 80 Ml 0 10 M Sodium H 1 (41.99 KiB) Viewed 28 times
Materials Unknown Solution Of Unknown Concentration Ca 80 Ml 0 10 M Hydrochloric Acid Ca 80 Ml 0 10 M Sodium H 2 (36.36 KiB) Viewed 28 times
Materials: . Unknown solution of unknown concentration ca. 80 ml . 0.10 M hydrochloric acid, ca. 80 mL . 0.10 M sodium hydroxide, ca. 80 mL . pH paper . • phenolphthalein indicator (pH range 8.3-10.0) bromothymol blue indicator (pH range 6.0-7.6) • methyl orange indicator (pH range 3.1-4.4) . Deionised water . . . . . . . . . . . Health & Safety and Environmental protection: • You are required to follow all health & safety and environmental precautions with aqueous solutions of acids and bases Procedure: Use the pH paper to determine whether the unknown solution is a weak/stron weak/strong base and select the appropriate titrant and indicator for titration bases have equivalence points within the acidic region and weak acids have points within the basic region) Carry out titrations to acquire the data needed to calculate the concentr unknown solution Stand and two clamps 50 ml burette Funnel Measuring cylinder 15mL glass pipette 150 mL glass beaker 100 mL conical flask Large beaker for waste RESULTS ANALYSIS Calculate the concentration of your unknown solution. Report all titration data and calculations. Suggest, with rationale, the identity of the unknown solution.
Page 10 of 10 pH of the unknown solution= 13-14 Recorded by pH indicator paper Volumes of titrant used 123 2 Final, mL 25.1 49.1 27.5 Start, mL 0 25.1 0
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