Chem 1LD Procedures with correct answers 100%

Chem 1LD Procedures with correct answers 100% Freezing Point: Step 1 - Correct Answer Connect temp. probe to LQ3. Make mode = "time based" , duration= 6 min, Rate samples/min= 6 Freezing Point: Step 2 - Correct Answer Make 2 400mL beaker water baths: 1.) One on hotplate (60-70C) and clamp thermometer (shouldn't be touching) and water level above 200mL 2.) One room temp. (have ice ready) Freezing Point: Step 3 - Correct Answer Weigh out 5g menthol and add to diff. large test tube w/ spatula Freezing Point: Step 4 - Correct Answer Put test tubes in 60-70C water bath to melt menthol. After fully melted take out and wait 2 minutes Freezing Point: Step 5 - Correct Answer Add temp. probe in menthol, press PLAY, then put into half-ice/water beaker Freezing Point: Step 6 - Correct Answer Vigorously move probe up and down and stop when resistance is felt. Stop data collection when tail is seem on graph. Freezing Point: Step 7 - Correct Answer Tap start of "flat" part and end to find start/end temps then take average for freezing point Freezing Point: Step 8 - Correct Answer Calculate molar mass MP: Step 1 - Correct Answer Set up Digitmelt settings: start temp=25C, end temp=150C, and ramp rate=10C/min. Press Start/stop to prepare MP: Step 2 - Correct Answer Put 2-3mm of solid into capillary tube (use tube tapper if needed) then put into Digimelt MP: Step 3 - Correct Answer Observe and record when it starts/ends melting, and the average. TLC: Step 1 - Correct Answer Create TLC chamber with spotters, filter paper, and plate TLC: Step 2 - Correct Answer Grab ~2mL of analyte and ~30mL of heptane and ethyl acetate stocks TLC: Step 3 - Correct Answer Make 10mL of 2:3, 3:2, 4:1, 9:1 heptane:EA eluents with graduated cylinder and pour into chamber with filter paper TLC: Step 4 - Correct Answer Draw origin line on plate with pencil and label analyte, then put 1-2 drops (let dry) TLC: Step 5 - Correct Answer Put plates in chamber then cap. Remove when eluent reaches near top. Mark solvent front. TLC: Step 6 - Correct Answer Let dry then put plate under UV and circle spots TLC: Step 7 - Correct Answer If needed: quickly dip plate in permanganate TLC: Step 8 - Correct Answer Calculate Rf values. Rf = (dist. from analyte to origin)/(dist. from origin to solvent front) Absorption: Step 1 - Correct Answer Put ~1mg solid in 50mL solvent Absorption: Step 2 - Correct Answer Serial dilute by putting 1mL (graduated cylinder) into volumetric flask then fill until 10mL mark. Repeat if needed Absorption: Step 3 - Correct Answer Press "Experiment" → "Calibrate" in top left, and allow 90sec warmup. Put blank (solvent) inside, press "Finish Calibration" → "OK" Absorption: Step 4 - Correct Answer Empty cuvette and pre-rinse 2x with solution. Put inside then press "Play" Solubility: Step 1 - Correct Answer Grab small test tubes and stand upright with beaker Solubility: Step 2 - Correct Answer Put tiny amount of solid in tubes with spatula Solubility: Step 3 - Correct Answer Fill each tube ¾ with each solvent and mix with disposable pipette Solubility: Step 4 - Correct Answer Record each tube's color, clearness, and solubility level Synthesis and Filtration: Step 1 - Correct Answer Clean out 250mL Erlenmeyer flask with soap and water