Briefly explain why it is important to use crucible tongs when you transfer the heated crucible (b) from the heat-resistant mat to the desiccator.

Fill in the following blanks that describe using sodium sulfate for a drying agent: Sodium sulfate dry's at a rate, requiring contact time but, it has capacity for adsorbing water. A slow, short, low B fast, long, low C slow, long, high D. fast, short, low

The chemical which reacts with  HCHO to produce a harmless material called urotropin is ___. This can be used to neutralize a large spill of HCHO.     cavity fluid     ammonia     paraformaldehyde     bleach

Aromatic Water Peppermint water (Simple solution method) Formula Peppermint ol Purifiled water. To make 60ml Materlals: Erlenmeyer flask, filtor paper Procedure Cinnamon water (Alternate solution method) Formula Cinnamon oil Purified water To make 60ml Materials: Purified talc Erlenmeyer flask, filter paper Procedure Camphor water (Alternate solution method with trituration with intervention) Formula Camphor crystals Purifled water To make 60ml Materials: 95% ethanol talc mortar and pestle. Erlenmeyer flask, filter paper Procedure

Briefly discuss emulsion and suspension polymerization techniques.

1. Place 5 mL of starch solution in each of 2 test tubes. 2. Heat the test tubes to boiling and add to  1 mL of saliva, Cool and then continue heating but keep the  test tube in a water bath at temperature of 60oC 3. At 5 minutes interval for 30 minutes take a drop of the reaction mixture from each test tube and test with Iodine solution (use a spot plate for the test and stir the contents of the test tube before taking a drop). Tabulate the results. 4. What would be the color of saliva extract with iodine in 3, 6, 9,12,15,and 18 minutes

Can you describe the main pathways (ingredient class or method) for modifying the rheological properties and adding viscosity / yield to a surfactant cleansing system (shampoo)? What would you be doing to the micelle and why would it thicken?

explain what advantage the technique of reflux has over conventional boiling

Watchglass Bent glass hook Arrangement for the drying of samples. It shows the recommended way to dry a sample. The weighing bottle is contained in a labeled beaker with a ribbed cover glass. Weighing bottle with cap ajar Beaker Reagent True O False

How is recrystallization of an impure solid accomplished?