Ethanol Lab Preparation

7-10 subparts

In this treatment level, part of suspended solids and suspended organic matter is removed. * Secondary Preliminary Tertiary O None of the above

Can you solve and complete this chart

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. 42. Primary Standard reagent used in standardization of 0.1N sodium hydroxide a. Sulfamic acid C. sodium carbonate KHP b. sodium bicarbonate d. 43.An analyst who determines the strength, potency and percentage purity of a drug or pharmaceutical product is performing: a. Special method C. d. Pharmaceutical assaying Identification test b. Pharmacopoeial test 44.Chemical analysis which determines the amount or percentage content of a certain component in a sample: a. Qualitative C. d. Proximate Ultimate Quantitative ܩ b.

I need help with those please.

please answer all w

you weigh your crude sample (1.538 g) and recrystallize with hot isopropanol. How do you know how much isopropanol to add?

Line equation?

How to determine the difference between primary , secondary and tertiary alcohol in the laboratory

write an equation for this lab and explain the observations that would occur: measure out 10 mL portion of 10% sodium sulphate into a clean test tube. Add 8 drops of 50% sulphuric acid and swirl. Count the number of drops (swirl after each drop) of 30% calcium chloride needed to produce a precipitate of calcium suplhate.

Can I get detailed explanation for this table , mentioning the apparatus and when’s the timer is started ? What happens next

Which of the following are hazards in this lab? Choose all that apply. Group of answer choices NaOH HCl NH3 acetic acid deionized water

Procedure 1. To 5 ml of permanent hard water, add 2 ml of sodium bicarbonate, NaHCO3, solution. Filter. To the filtrate, add soap solution. Write the reaction involved. 2. To 5 ml of permanent hard water, add 1 ml of soap solution. Compare the results obtained from procedures 1 and 2. Compare the amount of bubbles and precipitate formed. 3. Boil 5 ml of temporary hard water and add 1 mL soap solution. 4. To 5 ml of temporary hard water, add 1 ml soap solution. Compare the results obtained from procedures IIl and IV. Compare the amount of bubbles and precipitate formed. Question 1. What is the precipitate formed from the reaction of permanent hard water with sodium carbonate? Write the balanced chemical reaction involved.

Please Help me complete part d, e and f of question 4.

You obtain an Unknown Sample from the Stockroom.  You begin testing the solution through the steps outlined in the flowchart of the experiment’s PDF file.  You first add HCl and centrifuge your mixture.  You observe the formation of a white precipitate in the bottom of the test tube.   After pouring off the supernatant liquid, you add hot water to the white precipitate.  Addition of the hot water dissolves some of the precipitate, but some white precipitate still remains on the bottom of the test tube.  You pour off the supernatant liquid, and add ammonia (NH3) to the remaining precipitate.  You now observe the formation of a gray-black precipitate. Which of the following is a valid conclusion to draw at this point? Select one:     Hg22+ is definitely present.   Pb2+ is definitely present.   Ag+ could be present, or Hg22+ could be present, or BOTH could be present.   Ag+ is definitely present

You obtain an Unknown Sample from the Stockroom.  You begin testing the solution through the steps outlined in the flowchart of the experiment’s PDF file.  You first add HCl and centrifuge your mixture.  You observe the formation of a white precipitate in the bottom of the test tube.   After pouring off the supernatant liquid, you add hot water to the white precipitate.  Addition of the hot water dissolves some of the precipitate, but some white precipitate still remains on the bottom of the test tube.   Which of the following is a valid conclusion to draw at this point?     Pb2+ is definitely present.   Hg22+ is definitely present.   Ag+ could be present, or Hg22+ could be present, or BOTH could be present.   Ag+ is definitely present

Read the detailed procedure of an experiment in your screen. Evaluate each step in the procedure whether it belongs to HOMOGENIZATION, EXTRACTION, PURIFICATION/CONCENTRATION, DATA TREATMENT, or INSTRUMENTAL ANALYSIS step.

2. Any organic solvent waste (besides methanol and ethanol) generated in this experiment should be collected in your fume hood and poured into the waste container as directed. This waste should not be poured down the drain. true or false

1. Select a product from the stock shelf and transfer the liquid to a test tube. 2. Select a paper pH test strip. Record the color of the test strip in the data chart. Transfer it to the same test tube. 3. Note any color change of the paper and record in the data chart. 4. Drag the test tube containing the test strip over to the color chart to determine the pH range indicated by the paper. Record your results. 5. Record your conclusion about whether the substance is an acid, a base, or a neutral substance. 6. Repeat for all substances.

Please answer the following question about a lab experiment about synthesizing aspirin. The procedure for this experiment is included in the photos. Compare the appearances of the crude and recrystallized Aspirin, what are the reason for these two to appear different?

If an analytical method relies on a measurable property of an analyte that can be correlated with the amount of the said analyte, what type of analytical method is it?   Oxidative methods   Instrumental methods   Blank Correction methods   Classical methods

PART ONE: Preparation of FECNS* Solution Prepare the two solutions in table 1 by accurately measuring the required volumes of distilled water and CNS into two labeled test tubes. The absorbance of the solutions must be measured soon after adding the Fe" solution from a buret. TABLE 1 Fe 5 ml 5S mL Solution Distilled Water CNS 2 mL Total Volume 3 ml 2 ml 10 ml 3 mL 10 ml In this part of the experiment you are to explore what the above quote means. As a PRELIMINARY Exercise, formulate a hypothesis as to what would happen under each of the following circumstances: 1. 1ml of 0.0020 M CNS' solution is added to the unused portion of solution 1 in the test tube 2. One drop of 0.20 M CNS solution is added to the unused portion of solution 2 in the test tube.

CHEMISTRY RATE WILL BE GIVEN! NO LONG EXPLANATION NEEDED.

I need help understanding how to do this, can you please show me how you get the CFU/mL

Carla is using a fertilizer that contains nitric acid. How is nitric acid classified? strong acid weak acid strong base weak base Save and Exit Next Mark this and return ContentViewers/AssessmentViewer/Activit.

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

please quickly  thanks ! Please draw out the apparatus illustration for normal distillation and key points in this process

Example: A distillation model containing a certain percentage of water was taken from the model 25 ml and the amount of water that was discarded after the separation process was 2 ml Calculate the percentage of water that was isolated from the model

Using C1V1=C2V2

I need help with Q 2

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

Calculate the cfu per ml of each dilutions and cfu per ml of the stock suspension (highlighted below). Show your solutions.