What is the purpose of a boiling chip?  

The solubility of any compound depends on two factors: (a) the  ____A______of the solvent and the compound, and (b) the energy of the attractions in the crystal lattice that must be broken down to form a _______B________.

Name one chemical test that can distinguish between unknown compounds with following functional groups. Answers are either one or two words only ! a) alkene and alkane [A] b) alkane and 1o alcohol [B]  

You have a mixture of saltwater and  sand. Your task is to get each of the three components pure and separated.  You have learnt the following techniques in the lab. Which one(s) would you use to  effectively  complete this task. Use the letter corresponding to each technique in a sequence separated by ” ;”  to establish your sequence.  a.recrystallisation b. filteration c.drying  in the oven  d. acid-base extraction  e. gas chromatography f. thin layer chromatography g. simple distillation h. fractional distillation

You go to the lab to run this experiment. Your lab partner found an old book  which had a procedure (just like Harry Potter found the Half Blood prince’s book in book 6). Some general  ideas are given but some ink on some details had faded out .  The following questions will help you complete the picture.   1. Mix 5 mL 1-phenyl ethanol (molar mass 122 g/mol, density =1.02 g/ml)  with 15 mL of conc. H2SO4 in a ______mL round bottom flask.2. Add a  boiling chip and  gently swirl the contents and heat to boil in a reflux set up for 60 minutes .3.  Cool and collect the organic layer. Add CaCl2 was added. Stopper the flask and allow to  stand for 10 minutes with occasional stirring.4. Decant the product in a pre-weighed product bottle. Weigh the product and calculate the % yield.Analyze the product using GC, IR, NMR and chemical test.   What size RB flask should you pick for your reflux set up ?

A reaction needs to be refluxed at 65 oC, a good choice for this endeavor is 

% error  is calculated on 

Which of the following statements is true of applied research?

Which of the following statements is true of psychoanalysis?

Which of the following is a principle of critical thinking?