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- TRUE OR FALSE 4. A litmus paper test for the acidity or basicity of a solution is done by dipping a stirring rod into the solution and using this to wet the litmus paper. __________ 5. Water or glycerol should be applied to the glass tubing and the hole in the rubber stopper before inserting the glass tubing.Organic Chemistry Laboratory purposes: a. Why is it important to vent the separatory funnel (directed away from your face and body) after vigorous shaking? b. What is an disadvantage of using too little drying agent?You will be completing the extraction of caffeine with dichloromethane and water. In which solvent will the caffeine be found after the layers are mixed, and is this the top or bottom layer? A. Dichloromethane - top layer B. Dichloromethane - bottom layer C. Water - top layer D. Water - bottom layer
- Why is it bad to put too much water as the solvent when recrystillizing benzoic acid?Suppose you are allowed to mix drain cleaner and battery acid, what type of solution would you expect ?AP Question // Q 5) Using the graph below, find the slope (and its unit). What letter(s) the Beer's law does the slope represent? 0.500 (0.100, 0.485) 0.400- (0.075, 0.364) 0.300- (0.055, 0.243) 0.200- 0.100- (0.025, 0.125) 0.050 0.100 Concentration (M) AP Question // Q 6) Write a balanced net ionic equation for the reaction between barium nitrate and copper(II) sulfate. Q 7) If the mass of barium sulfate is 0.372 g, find the number of the moles. Questions 8- 9 refer to the choices below. A. Chromatography B. Crystallization C. Fractional distillation D. Filtration Absorbance
- Why should the sodium carbonate be dried prior to standardization? Answer briefly and own wordsWhat physical property determines which solvent sinks to the bottom when performing a liquid-liquid extraction? A. Refractive Index B. Solubility C. Density D. Boiling PointPlease help me , I need fast solution. Please don't parovide handwritten solution ....