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

Q: Place 5 mL of starch solution in a test tubes. Heat the test tubes to boiling and add  1 mL of…

A:

Q: Fresh pineapple will prevent the gelatin froms setting, but if I added canned pineapple into…

A:

Q: What substance is used to help dry your sample rapidly?

A: The substances that rapidly absorb moisture from the surrounding atmosphere or dry it out are called…

Q: Agarose gel electrophoresis is relatively simple and straight forward to perform. Agarose is a…

A: two monomer units present in agarose are:

Q: does melting point determination remove impurites in crude protein?

A: Concept- Melting point is the temperature at which solid will convert into liquid. Because it is a…

Q: Based on the readings and lecture on emulsions, and the procedures for this lab answer the following…

A: Given dispersed phase Air Oil Water Egg Dispersed phase =…

Q: When setting up a column, what is the reason for adding a layer of sand on top of the adsorbent…

A: Column chromatography is a technique that separates substances based on differential adsorption of…

Q: Find the percentage of K in the sample as received.

A: Soln: First get the weight of the dried sample:   Wt sample –(% moisture* wt sample) = wt sample…

Q: Write TRUE if the BOLD word/phrase makes the statement correct. Otherwise, write the correct…

A: Recrystallization, also known as fractional crystallization, is a procedure for purifying an impure…

Q: In the  EXPERIMENT  PREPARATION OF POTASSIUM IODATE, SODIUM THIOSULFATE AND STARCH SOLUTION   2.…

A: A titration is the process of determining the quantity of a substance A by adding measured…

Q: One of the following is not a method to break up emulsion: Select one: a. Salting-out b. Stirring c.…

A: An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or…

Q: In iodometry, a student forgot to add H2SO4 before the addition of KI.   Is there a positive…

A: In iodometry, iodine is liberated by adding sulphuric acid to the solution of iodized salt.

Q: What is the purpose of using ether in preparing the dispersion of egg yolk sample? (the answer…

A:

Q: Method of separation/chemical reaction (with brief process) of 1.5 kgs cream of tartar and 2.5 kg…

A: Unrefined substance SOURCING  (1). Source (regular/Synthetic) of unrefined substance :- 1)cream of…

Q: Create a chemical equation based on this procedure below depicting the reaction being conducted. It…

A: Synthetic organic chemistry involves the production of new molecules by the appropriate combination…

Q: In line with the correct answr to the previous question, indicate which statements are true about…

A: Fractional distillation is one of the most widely used separation techniques in chemistry. This…

Q: Organic Chemistry Laboratory purposes: a. Why is it important to vent the separatory funnel…

A: Separating funnel is required in laboratory so as to separate two immiscible liquids. In this layers…

Q: What are the ideal factors to consider for ranking these glove materials for toluene exposure

A: Glove selection chart provides advantage and disadvantages of a specific gloves to protect from the…

Q: In extraction, usually we saturate the aqueous layer by salt in order to: Select one O a Precipitate…

A: The answer is option c. which is, dry the organic layer(act as a drying agent).

Q: Discuss why synthetic lubricants is preferred over petroleum-based fluids for specific applications.…

A: There  are many Advantages  of synthetic  lubricants over petroleum  based fluids.

Q: Define gelsication and Write the steps of “drying by sublimation” for heat labile products? and also…

A: Following are the appropriate answers of the given questions.

Q: What should you do if there are insoluble impurities after heating up your sample in the…

A: A multiple choice question based on purification, which is to be accomplished.

Q: Why do we use more than one solvent in the cold extraction method?

A: In chemistry like dissolves like

Q: What is done if the solid contains a colored impurity?  Know the proper funnels and equipment to…

A: The procedure is about purification through recrystallization process.

Q: Why do you think a large excess of sulfolene was used? This is the expermimnet:  Mix 2.5 g of…

A: In the experiment mentioned, sulfolene was used to generate 1,3-butadiene, which is the main…

Q: Just prior to drying an organic layer with a drying agent, you notice water droplets in the organic…

A: According to the given problem just prior to drying an organic layer with a drying agent, we notice…

Q: please answer hurry up ..... What kind of “cation and anion exchanger resins” can be used in the…

A: Ion exchange chromatography useful for separation of ionic compounds. Separation is based on…

Q: If we wanted to improve our set-up, we could have added a desiccant between two cotton plugs.  Why…

A: Dessicator is used to dry the compounds that is synthesized in laboratory.

Q: As part of the discussion, explain your results from Part 2 within the context of Le Châtelier's…

A: The equilibrium system is: [Co(H2O)6]2+(aq)+2 Cl-(aq) ⇌   [CoCl2 (H2O)2 ] (aq) +4 H2O(l)   (pink)…

Q: Was this experiment green and were the solvents safe? Could other have alternatives been used…

A: Guaifenesin is synthesized by Guaicol in an SN2 reaction with NaOH which provides conjugate base of…

Q: Nitrous Acid Test Procedure: Make a solution of  4 grams NaNO3 in 16 mL water. Put 2 mL of…

A: Nitrous acid test is the test used to distinguish between primary, secondary and tertiary amines.

Q: If you place two spots of the same pure compound one vertically above the other on the plate (so…

A: Total height of plate = 10.0 cm The lower spot (A)  =  1.0 cm from the bottom of the plate. The…

Q: Use special gel loading tips or a micro-syringe to load the complete sample in a narrow well. Take…

A:

Q: Suppose you have an organic sample X that is somewhat soluble in water, even though it issomewhat…

A:

Q: 1. n-heptan sample a good lubricating oil? Explain your answer

A: As per our community guidelines, as you have posted two questions and haven't specified which one…

Q: Starting Material mmol mL Methyl Salicylate 10.0 1.3 Weight m.p. (°C) 1.59 g 158-160 Product…

A: % Yield = 100 x mmol of salicylic acid/mmol of methyl salicylate Number of mmol = 1000 x Mass in…

Q: Imagine that you have your final organic extract in front of you and you've just added the indicated…

A: A question based on purification, which is to be accomplished.

Q: purification of egg yolk vitelline 1) Measure the volumes of 3 egg yolks and mix by adding an equal…

A: The vitelline membrane is the transparent casing that encloses the yolk of the hen's egg and…

Q: The

A: Given: Data tabulation on Limonene (ug/ml) & Response of Detector is given   Response…

Q: What is the purpose of washing the crude product with petroleum ether before filtration?

A:

Q: Explain what happens in the Hydrolysis of Esters with Acetic acid. Place 30 mL of ethyl acetate…

A:

Q: A piece of filter paper is placed in the TLC developing chamber to: Choose one: provide a lining…

A: The correct option is (c) It is because filter paper in used in developing chamber  as it absorbs…

Q: It is important to pre-wet the filter paper before filtering your sample. Which statements about…

A: One important step in the procedure for filtration using filter paper is to pre-wet the filter paper…

Q: 9. Just prior to drying an organic layer with a drying agent, you notice water droplets in the…

A: If water droplets are present in organic layer, so to remove it from organic layer you have to add…

Q: C. PARAFFIN 1. Place a paraffin about the size of a rice grain in a dry test tube. Warm gently and…

A: Paraffin is a petroleum product. It is a highly branched saturated hydrocarbon of alkane class. So,…

Q: At the end of your experiment, left over reagents should be disposed of in a(n) Regular garbage…

A: At the end of your experiment, left over reagents should be disposed of in an

Q: When extracting an aqueous solution with an organic solvent and after agitation and settling, the…

A: Given information : When extracting an aqueous solution with an organic solvent and after agitation…

Q: a) What is capillary electrophoresis used for? b) Describe electrophoresis. c) Describe…

A: Since you have posted multipart of question as per the guidelines i have solved first three subparts…

Q: CREATE A SCHEMATIC DIAGRAM USING THE PROCEDURE: Weighing of standard reagents 1. Make an…

A: Chemists use standard reagents to avoid worries about the purity of the chemical compounds. While…