Chem 1LD Practical with correct answers 100% 2026

Chem 1LD Practical with correct answers 100% 2026 Miscibility lab main points - Correct Answer How intermolecular forces affect the additive volumes of solutions Observe immiscibility of unlike liquids (ethyl acetate top, water bottom, density) Water, ethanol, and acetone all polar. Heptane is not. LDF forces at least for all. Free Energy Equation - Correct Answer ΔGsoln = ΔHsoln - TΔSsoln Miscible liquids waste - Correct Answer ethanol solutions - dilute with water and pour down drain Rest organic waste Pressure lab main points - Correct Answer Plot lnP vs 1/T to determine enthalpy of vaporization (just ethanol and air) Nonideal solutions deviate from Raolt's law due to intermolecular forces that either increase or decrease the vapor pressure (ethanol mixed with other shtuff) Clausius-Clapeyron equation - Correct Answer ln(P) = -H/RT +C R = 8.3145 Take slope of line and then multiply by R Raolt's Law - Correct Answer Psolution = PsolventXmolefraction Pressure lab reminders - Correct Answer use parafilm to prevent leak calculate air and vapor pressure as you go! - must do P1V1= P2V2 each time to account for change in air pressure Closed valve is horizontal Measure air temperature before injecting ethanol must change x (temp) and y(pressure) axes ***modes with entry (mmHg) close valve quickly! increase temp by adding boiling water -3D increments, need 6 measurements STOP BEFORE 40C Volume of system changes when we add ethanol in, although we assume it remains constant. Calculating vapor pressure - Correct Answer Ptotal = Pair +VPethanol must adjust Pair for every temp increase Pressure discard - Correct Answer can pour ethanol down sink Pressure results - Correct Answer Ethylene glycol and lauric acid polar and strong forces with water. Benzoic acid also polar, but perhaps doesn't react as strongly with ethanol as ethanol reacts with itself, causing ethanol to be held more loosely and more easy to evaporate. Q test - Correct Answer (suspected outlier- point closest to outlier)/range Aspirin synthesis main points - Correct Answer Making ASA - suspend salicylic acid in acetic anhydride where phosphoric acid acts as a catalyst. *SA is limiting reagant Then split apart acetic anhydride with water (careful!) Beer's law - Correct Answer Beer's law: A=λL