Digital Lab Techinques Dry Lab Worksheet

Subparts 4-6

Color BEFORE adding Color AFTER adding Intensity of color AFTER adding FeCl3 Test Tube # FeCl3 FeCl3 #1 (salicylic acid) clear lilac 100% #2 (commercial aspirin A) clear slightly pink 50% #3 (commercial aspirin B) clear lilac 95% #4 (aspirin from your clear pink 20% synthesis above) #5 (control) clear clear 0% Based on this data and the melting point of Aspirin, how pure is the synthesized product?

The density of the first fraction collected would be expected to be close to a value of ______.     1.00 g./mL     0.895 g/mL     0.789 mL     0.950 g.mL

The ______________ is the physical method of separation illustrated in this process: About three milliliters of aqueous iodine solution is mixed with one milliliter of chloroform in a test tube. The solution is shaken very well and a formation of two layers is observed. *         Filtration       Extraction       Distillation       Adsorption

This means the resulting mixture looks like a ____________liquid no matter how much ethanol or water is added.

Mud filtration test to determine volume of filtrate and the permeability of mud cake collected after a 30-min period of time using filter paper. These tests are the low temperature/low-pressure fluid loss test, often called the American Petroleum Institute (API) test. Questions: 1- When conducting the experiment, why should the pressure be maintained (100 psi)? 2- What are the two most important benefits of mud cake? 3- What kind of log can thickness of mud cake be measured?

this is for the Extraction and Isolation of Caffeine from coffee lab

calculate the mass of the distillate_______________ and the density of the distillate.  use the rules of significant figures include units    trail 1   mass of empty graduate cylinder, gm  5.280 grams volume of distillate, ml  3.01 ml mass of cylinder with the distillate, g  7.936 g boiling point of the distillate, C degree 92.1

PART 3- LABORATORY EQUIPMENT EQUIPMENT NAME FUNCTION To hold test tubes. Attaches to a retort stand to support glassware being heated. To pour liquid from a large container into a small container. To provide a flame during an experiment. ones To light the Bunsen burner. To attach test tubes to a retort stand. To clean substances out of a test tube. To hold a hot crucible or flask. To hold a hot test tube. To place on the lab bench to prevent burning or to use with ring clamp. To transfer small amounts of liquid. To grow bacteria or contain small experiments. To hold liquids. To measure liquids. To contain experiments (a stopper can be used to close the flask). To hold a hot beaker. To perform an experiment with a different substance in each well. To hold chemicals and perform experiments in. To scoop and transfer small amounts of substances, To stir during experiments that involve mixing or dissolving.

Express answer with two decimal places. The amount of albumin in a blood sample was determined to be 82 mg %. This is equivalent to _________ mg/dL.

Clear and concise solutions please. Tha k u

Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 60. What is/are the purpose/s of heating sodium carbonate in 270°C for one hour before using it in the standardization of hydrochloric acid? 1. To remove carbon dioxide that is generated during the neutralization reaction II. To remove moisture III. To convert sodium barbonate to sodium bicarbonate a. I, II and III C. I only b. II only d. II and III 61. The process by which the exact concentration of a solution is determined: a. Dissolution C. Standardization Titration b. Neutralization d. 62. The function of Quality Control include the following, except: a. C. Analytical control Planning b. Auditing d. Inspection control

Clinical __________________ is defined as a quantitative relationship between dose and effect that provide a way to interpret the measurement of concentrations of drugs in biological fluids.

Which one hardness type that remain .after boiling process Temporary hardness. O Permanent hardness. O

some elenent D is 1.79 cal/gram. At -65 °C and 1 atm, (solid) and D(liquid) are 18.11 g/cm³ and 17.19 g/cm? .respectively Calculate MP of compound D At 100 atm .1 72.81- At 500 atm .2 Note: Melting point (MIP) .Please answer all parts of the question Scanned with CamScanner

. Be sure to understand what the dilutionfactor is for each sample (dilution factor = the number used to determine the actualconcentration of the stock UK after the diluted samples are analyzed) ?

5. EXTRACTION To 1 ml. of bromine water in a test tube add .5ml chloroform or carbon tetrachloride. Note the color of the liquid layers. Which layer is more colored? What do you call such liquids which do not form a homogenous mixture? Can you possibly make them homogenous? How? Transfer the mixture into a separatory funnel and add 2 ml. more of bromine water and add 1 ml. more of chloroform of carbon tetrachlorides then shake to effect proper mixing. Let out the lower layer through the stem of the funnel. Again add another 2 ml. to chloroform or carbon tetrachloride to the aqueous solution in the funnel and shake as before. How does the color of the chloroform or carbon tetrachloride layer compare with the first extract? How do you explain the difference? Is it possible that after several extractions the chloroform layer will become colorless? Why?

Chemistry If the original gravity is 1.03 and final gravity is 0.96, calculate the percent alcohol content after fermentation? Answer to one decimal place Type your answer... For measuring carbohydrate concentration with a sample that absorbs 0.26, standard that absorbs 0.16 calculate the concentration assuming similar standards and dilution used in the lab. Give answer to one decimal place Type your answer... ---D-O

Multiple choice. Please check my answers from 5-9 if they are correct. Thanks!

• Stock solution: 1000 mg/L Target sample concentrations: 50-400 mg/L • Create a 5-point standard dilution to cover the test • If each test only needs 10 mL, make plans to make the dilution so you have 20 mL of each concentration. ·

Please answer question and give a brief explination why

Multiple choice. Please check my asnwers from numbers 5-9 if they are correct. Thank you!

help with the conversions

I need the answer as soon as possible

please answer all w

Write TRUE if the BOLD word/phrase makes the statement correct. Otherwise, write the correct WORD/PHRASE that will make the statement true. If there are two bold words/phrases in a number, write your answer for EACH of the bold words/phrases. 1. In the extraction of caffeine, NaOH was added to dry the collected organic layer. 2.  Purification of caffeine via sublimation was possible because it has a high sublimation point at a temperature above its melting point. 3. The E/Z designation is used to describe the orientation of identical groups in alkenes.

Experiment: distillation and hardness of water