BTEC APPLIED SCIENCE UNIT 2 LEARNING AIM A TITRATION 2022/2023

BTEC APPLIED SCIENCE UNIT 2 LEARNING AIM A TITRATION 2022/2023 Titration Report Introduction: We have been given a few tasks that all relate to finding the concentration of a solution today. We are going to be creating a standard solution, titrating with it, using a pH meter instead on an indicator and using a colorimeter. Task 1 (Standardisation of a solution) Creating a solution with a known concentration. Standardisation method: To standardise our solution, I measured out 2.65 grams of sodium carbonate in a weighing boat on a calibrated scale and then transferred the solid sodium carbonate to a beaker making sure all of it had been transferred over by rinsing the weighing boat with distilled water and pouring all the liquid into the beaker with the sodium carbonate. I then mixed the sodium carbonate with the distilled water and broke the sodium carbonate that had fused at the bottom with my stirring rod. Once it was thoroughly mixed, I transferred the solution from the beaker to a volumetric flask of 250 cm³ using a funnel and rinsed the beaker and funnel well to ensure that the concentration of my standard solution remains what I want it to be. I then filled up the volumetric flask until the meniscus of the solution was on the 250 cm³ mark, put a plug blocking the opening of the volumetric flask and inverted it to completely mix the solution with the newly added distilled water. Calculations: 1. Equation: Na2CO3 + 2HCL –> 2NaCl + H2O + C02 2. Concentration of Na2CO3 = 0.025/250 x 1000 = 0.1 moldm-3 3. Moles of Na2CO3 in 250cm-3 = 0.025, moles in 25cm-3 = 0.025/10 = 0.0025 Risk assessment: Risk Hazard Level Precaution Emergency Can cause serious eye irritation Sodium Carbonate (anhydrous solid) Medium - Wear eye protection - Avoid contact - Flood eye with water for 10mins Glassware Breaking/stabbin g Low Handle carefully - If broken do not touch. Weighing balance Electrical shock Low Do not touch exposed conductors If shocked, seek medical advice. Evaluation: The standardisation we had to perform today was fairly straightforward, we mixed sodium carbonate distilled water to form sodium hydroxide. While I feel my standardisation went well, I could have set up and prepared for other titrations during this part. Downloaded by kelvin githinji () lOMoARcPSD| Task 2 (HCL and a standard solution) We are aiming to find the concentration of hydrochloric acid using sodium carbonate which with a known concentration and methyl orange as the indicator. Equipment list: 1. Graduated pipette (25 cm³) 2. Funnel 3. Conical flask (250 cm³) 4. 3 beakers (preferably above 250 cm³) 5. Indicator 6. Clamp stand 7. Burette (50 cm³) 8. Pipette filler 9. Distilled water Calibration of a scale: I located the calibration button of the digital scale. The button may also be labelled as: “Cal,” “Function,” “Mode,” or “Cal/Mode.” I pressed this button down until the digits displayed on the scale turn to “0,” “000,” or “Cal.” I tested if it was calibrated and set it aside to use later. Calibration of a volumetric flask: To calibrate the volumetric flask, I placed the volumetric flask on a calibrated scale, recorded t