Excess reagent - Study guides, Class notes & Summaries

Determine the limiting reagent and excess reagent in the reaction you will perform in this experiment. correct answer: Excess Reagent: methanol Limiting Reagent: triglyceride Unsaturated Fatty Acids correct answer: have one (or more) C=C bonds. Saturated Fatty Acids correct answer: have no C=C bonds. The addition of water to sodium methoxide produces _______________ and ________________ correct answer: Sodium Hydroxide; Methanol After completion of the experiment, where do you d...

Describe the proper technique for performing reagent strip testing. - Answer •Strips have chemical pads on plastic strip •Compare the color change on pads w/in required time frame •Dip strip into well-mixed specimen at room temp •Remove excess urine on edge of cup •Blot edge of strip on absorbent pad •Wait req time •Read in good lighting List four causes of premature deterioration of reagent strips, and describe how to avoid them. - Answer •Moisture •Volatile chem...

What are saturated vs unsaturated fatty acids? correct answer: •Saturated fatty acids have no C=C bonds (their C's have max # of Hs) •Unsaturated fatty acids have one or more C=C bonds (monosaturated = one double bond) (polyunsaturated = more than 1 double bond) •Z (cis) are naturally occurring double bonds; E (trans) are artificial double bonds How is biodiesel produced commercially? Which method is predominant? correct answer: ***1) Base catalyzed transesterification of oil with ...

AQA A LEVEL BIOLOGY Paper 1 2024 What is the function of the cell membrane? - ANS To control what enters and leaves the cell, acts as a barrier between the cell and its environment. What structural feature of the cell membrane allows substances to enter/leave? - ANS Partially permeable What is the fluid mosaic model? - ANS States that a membrane is a fluid structure (because phospholipids are constantly moving) with a "mosaic" of various proteins embedded in it Describe t...

Determine the limiting reagent and excess reagent in the reaction you will perform in this experiment. correct answer: Limiting reagent- triglyceride Excess reagent- methanol unsaturated fatty acids correct answer: one/more C=C bonds saturated fatty acids correct answer: no C=C bonds The addition of water to sodium methoxide produces_________ & ________ correct answer: sodium hydroxide, methanol After completion of the experiment, where do you dispose of FAMEs? correct answer: ...

AMCA CMAC Practice Review Questions with Verified Solutions 2023/2024 Which organization developed the guidelines for universal precautions? Select one: a. CLIA b. OSHA c. CDC d. EPA e. FDA - correct answer c. CDC According to OSHA, medical personnel must wear PPE (personal protective equipment) when they have contact with: Select one: a. sweat b. blood c. hair follicles d. tears e. skin - correct answer b. blood To detect pregnancy, either urine or blood serum is tested...

Unsaturated fatty acids - have one or more C=C bonds Saturated fatty acids - Have no C=C bonds What are the ways that biodiesel is produced commercially? Which method is the predominant method? - 1) Base-catalyzed transesterification of the oil with methanol and one used in lab. 2)Acid-catalyzed esterification of the oil with methanol 3) Saponification of the oil to yield free fatty acids, followed by acid catalyzed esterification. Match the products and catalyst for the following tran...

CHEM 101L UNC FINAL QUESTIONS AND ANSWERS If a flammable substance in a beaker should catch fire while you are working but the flames are relatively contained, what should you do to extinguish the flame? What should you not do? DO: Use the chemical fire extinguisher from the lab. Pull the pin, aim the nozzle to the beaker, and pull the lever. DO (Best, simplest): Turn off the heat source immediately and use a watch glass to cover the beaker. DON'T: Use water from the nearest sink to d...

Stoichiometry - Part of chemistry that studies amount of substances that are involved in reactions Mole Ratio - Identify how many moles of product are formed from a certain amount of reactant. Molar mass - Defined as the mass of given substance divided by its amount of substance Limiting Reaction - How much of the product is produce Excess Reaction - what is left over Theoretical yield - Quantify of a product obtained from the complete conversion of the limiting reactant in chemical reacti...

Which of the following best describes the reaction that occurs during blood testing? a. Hemoglobin or myoglobin catalyze the oxidation of chromogens. b. Chromogens catalyze the oxidation of hemoglobin or myoglobin. c. Hemoglobin or myoglobin catalyze the reduction of chromogens. d. Chromogens catalyze the reduction of hemoglobin or myoglobin. - B What is the resulting color range observed during blood testing? a. Red through yellow to light green. b. Orange through green to dark blue. c....