Experiment VII

A sample of 14000 ppm iron is Strong Acid has to be diluted between 95 and 180  ppm.  The method chosen was to dilute in three dilutions of 100 mL each.  The first dilution is a 1/5, the second dilution is a 1/6 and the third dilution is a 1/3.  Determine how much of each component goes in each tube.  Determine the concentration of each tube.  Are we within the proper range?

Using M1V1=M2V2 Make 100ml of a solution that contains 0.5mM MgCl2, 15 mM CaCl2 and 120 mM KCl 0.5M of each of these chemicals.

Main Goal: Convert the experimental glucose concentration from mM (millimolar) to g/100 mL. Take the 1/100 dilution factor into consideration Molarity will open the doors for you to get to grams. Once at M assume 1L of solution. (Hint: this will help you when converting from M to moles) You will also need to calculate the molar mass of glucose which has the formula C6H12O6 There are 5 steps in total Task 1: Write a step-by-step guide with key words for the students on how to do these calculations. Ensure the steps are clearly written and easy to follow.

Commercial bleach is usually 5% solution of hydrochloric acid. true or false

Given that liquid alum is used as a coagulant. Specific gravity of alum is 1.33. One gallon ofalum weighs 11.09 pounds (5.03 kg) and contains 5.34 pounds (5.42 kg) of dry alum.Determine: (a) mL of liquid alum required to prepare a 100 mL solution of 20,000 mg/L alumconcentration, (b) the alum concentration, (c) the dosage concentration of 1 mL of stocksolution in a 2000 mL Gator jar sample.• Determine alum concentration in mg/L• Prepare 100 ml stock solution having a 20,000 mg/L alum concentration• Calculate mL (y) of liquid alum to give 2000 mg• Find 1 mL of alum concentration (z) in 2000 mL sample (jar)

Calculate the concentration in ppm of Cd in a 2.00 mL sample which has been shown to contain 16.4 μg Cd. Assume the sample has a density of 1.00 g/mL. Show your work for full credits (just explain step by step and put the answer at the end)

Reading for the unknown solution: Trial 1: 7.3 Trial 2: 6.8 Trial 3: 7.3  Reading for the distilled water: Trial 1: 0.9 Trial 2: 0.8 Trial 3: 0.8 How did the answer happen? Show complete solution Normality of Agno3 is: N/50 =  0.02

Table 1. Miscibility of Coconut Oil and Solubility of Cholesterol Solvents Coconut Oil Cholesterol Water     Ethanol     Chloroform     Ether       Guide Questions: At which solvents are coconut oil and cholesterol miscible/soluble? Explain why. ________________________________________________________________________________________________________________________________________ During washing oily dishes, it is not enough to just use water. We need to use soap. Explain the function so soap in this situation. ________________________________________________________________________________________________________________________________________ Table 2. Spot Test Substance Observation Inference (Volatile or Non-volatile) Coconut oil     Glycerol     Ethanol     Ether             Guide Question: What does it mean when something is volatile?…

ANSWER THEM ALL FOR AN UPVOTE. ASAP PLEASE. The theoretical weight of 10 tablets is 9.35g. Each tablet contains 425mg of the active ingredient. Using this data, determine the amount of additive needed to prepare 160, 000 tablets.  How many grams of drug are required to make 500ml of 25.0% solution?

a 5% solution has been poured into a container already containing some solution. the total volume is now 300 ml and its concentration is 4.5%. how many ml of the 5% solution were poured in? Show work on how to get the answer. The answer is 270 ml

How many microliters of a 904.0 ppm Co2+904.0 ppm Co2+ stock solution are required to prepare 20.00 mL20.00 mL of a 19.0 ng/?L Co2+19.0 ng/μL Co2+ solution? Significant figures are graded for this problem. Be sure you do not round your answers until the very end of your calculations.

Briefly explain why the 1-mL pipette has a lower percent tolerance level in the range 300-1000 than when delivering 30 of solution.

What volume must 100.0 mL of 0.500 M sulfuric acid solution be diluted to prepare 0.200 M sulfuric acid solution? Group of answer choices 140. mL 150. mL 250. mL 350. mL 40.0 mL

Which of the following is/are proper lab techniques in solution preparation?  Choose one or more best answer: a. Quickly adding 90mL of distilled water onto 10mL of concentrated acid to make 100mL of diluted acid solution b. Adding NaOH pellets in the volumetric flask and immediately diluting to mark c. Quantitatively transferring dissolved solids from a beaker by pouring washings into the final container d. Using cold distilled water to dilute a solution to mark so it does not get hot e. Using a volumetric pipette when applicable to get the most accurate aliquot volume f. After diluting to around 90mL before the mark, transfer the solution into a beaker to cool down more efficiently. g. Storing everything in plastic containers as plastic is more inert than glass for most chemicals   Note: Just answer, no explanation needed. Thanks

Experimental Design: Consider a group that must make 2M NaCl in a total volume of 100 mL water using glassware. Make a list of steps that a partner could follow on how to make this solution.

Drug Stock solution concentration = 10 millimolars Desired drug solution concentration = 10 micromolars The final solution will be inserted into a well that can hold 8 to 10 mL of solution. How much stock solution and solvent must be used to change the 10 millimolars stock solution to 10 micromolars?

For results/conclusions Using the images attached Write 2 paragraphs 1st paragraph: Starts with Objective. Results of DeltaT and i stated 2nd paragraph: sources of errors discussed The objective is The colligative properties are the properties that undergo a change when a solute is introduced to a solvent. Freezing point depression is also a colligative property. The addition of a solute to a solvent reduces the freezing point of the resulting solution. The freezing point of the solution is always lower than the freezing point of the solvent. This difference in the freezing point between solvent and solution is called freezing point depression. The freezing point depression is directly proportional to the molality of the solution or the number of moles of solute present in the solution.

The amount of caffeine was influenced by the temperature of water used to brew, and the time of brewing. The concentration of caffeine is dependent on the volume of water used for brewing.      Both statements are correct.     1st statement is True. 2nd statement is False.     1st statement is False. 2nd statement is True.     Both statements are False.

Using Dimensional Analysis show all work to calculate the mass of a solution prepared from 100 mL DI water (density = 1.00 g/mL) and 5 g NaCl (s).

a. Convert 52.6 mM (millimolar) to μM (micromolar) and to M (molar). b. Convert 200.0 μM to mM (millimolar) and to M (molar). c. The new U.S. Public Health Service optimal fluoride concentration in water is 0.700 mg/L. Convert this value to M (molar) and to ppm. Upload your responses here.

Cedrick and Astrid a 20.00 ml aliquot of grapefruit juice with a 0.165 M NaOH solution to the end point. The initail buret reading was 1.72ml and final buret reading was 15.51ml.   They calculated that there was 0.1457g of citric acid present in the juice sample. What is the amount mg of citric acid present per ml of juice? the answer is 7.29mg/ml. (can you please show me how to calculate this answer)

Mikaela is a STEM student who is currently having her General Chemistry 2 subject.Today, she is asked by her teacher to prepare a CuSO4 solution. Help her do her task byfollowing the procedure and answering the question below.1. Obtain a sample of CuSO4 from the front bench.2. Using your scale, weigh out 18g of CuSO4.3. Dissolve the 18g of CuSO4 in 100 mL of distilled water.4. Stir until you have reached a homogeneous solution with all the solute dissolvedin the solvent.Calculate the concentration of your solution (M in mol/ L of CuSO4). Show your workin the space provided below.

MULTIPLE CHOICE: Choose the letter of the best answer Please answer all questions correctly 1. The standardization of volumetric solution does not require hydrochloric acid. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 2. In the standardization of its volumetric solution, the primary standard is dried to constant weight, which means drying shall be continued until two consecutive weighings do not differ by more than 0.50 mg. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 3. In the standardization of its volumetric solution, potassium iodide was added to A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 4. Starch is the indicator of choice for these procedures because it forms intense blue coloration with the solution. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E. C and D 5. In the standardization of its volumetric solution, the reaction needs to be…

Identify whenther the statement are TRUE or FALSE 1. Sedimentation time of a given particle will be zero when the density of the particle and the solvent are equal. 2. Sedimentation time depends on the shape of the particle

Which of the following are considered solution samples? Select all that apply.   A. natural waters   B. milk   C. capsules   D. seawater   E. blood   F. sediments   G.commercial solvents   H. aerosol particulates

A soil sample from my front lawn has a higher than normal salinity. What might be 2 logical reasons for this?

Calculations/Results:*Show all work with units for each calculation below.  Each answer must contain the correct units and the correct number of significant figures. Solvent               Mass of solvent (in grams) _________________               Mass of solvent (in kilograms) _______________       Concentration of Sucrose               (a)  Mass/volume percent of the solution ___________________                         (b)  Mass/mass percent of the solution ____________________               (c)  Molarity of the solution ______________________________                 (d) Molality of the solution _______________________________   Dilution Calculations             Calculated molarity of the sucrose solution from Part 1: __________

A 1 mL microbial suspension comparable to 1 mL of 1.0 McFarland standard was subjected to a series of dilutions. An aliquot of 0.2 mL was transferred into a 100-mL volumetric flask and diluted with sterile saline solution to its final volume. Then a 0.1 mL of the resulting solution was transferred into a 50-mL volumetric flask diluted to its final volume. What would be the final concentration?

5.300. mL of a 18.0 M solution of H2SO4 acid has enought water added to it to make a new volume of 1.00 L. What is the new concentration? Numerical answer:    Unit:    Label:      Blank 1: Blank 2: Blank 3:   6.What is the concentration, in ppm, if 0.00021 g of Arsenic (As) was found in 3126 g of drinking water? Numerical answer:    Unit:    Label:      Blank 1: Blank 2: Blank 3:

Learning Task No. 4: Use the sample problem as a guide to help you solve the % concentration of your prepared solution. Dissolve 10.0g of a substance in 100.0g of water., the concentration by mass will be: Divide the mass of the solute by the total mass of the solution. c%=10.0g10.0g+100.0g* 100%=9.09  Solutions to make: 1. 450 g flour and 1 L water 2. 500 ml alcohol and 1 L water 3. 300 g rice grains and 540 ml water 4. 450 g sugar and 360 ml coconut milk 5. 50 ml liquid detergent and 250 ml water

A. Density Computation. Solve what is asked. Round off your answers into 2 decimal places and make sure to place the appropriate unit. Encircle your final answer.5. A flask that weighs 342.5 g is filled with 223 mL of carbon tetrachloride. The weight of the flask and carbon tetrachloride is found to be 702.55 g. From this information, calculate the density of carbon tetrachloride. Please provide complete solution

Please answer question and just send me the paper solutions asap dont type the answer question 3and 4

Density Lab (Need help plotting this graph) How to plot this graph from the data sheet (see picture attached) with mass of solution (on y-axis) vs volume of solution (on x-axis) for the 0%, 10%, 20%, 30%, 40%, 50%, 60% sucrose solutions so that it is all on one graph? There should be seven sets of data with seven best-fit lines on one graph. The y-intercept of the best-fit line is set to 0. Please include how to setup the data in excel spreadsheet to plot the graph. Thank you

Methyl salicylate Emulsion (Forbes Bottle Method)SOLVE FOR ITS WEIGHT/VOLUME REQUIRED TO MAKE 30 ML. SHOW COMPLETE SOLUTION. I NEED IT ASAP AND ANSWER THEM ALL FOR AN UPVOTE.               COMPONENTS        WEIGHT/ VOLUME REQUIRED             Methyl salicylate Oil                        ?                    Acacia powder                        ?               Purified water                       ?                TO MAKE           30 ml

1. Based on your experimental and product label observations, how do regular and diet coladiffer?2. When you calculate the density of either regular or diet cola, does the size of thesample matter? Explain your answer

The unknown salt you will be identifying is composed of one of the 6 anions and one of the 6 cations studied during previous weeks of lab. However, the list is not endless. An obvious physical property can be used to eliminate some salts. Another physical property can imply or eliminate possibilities as well. During this lab, what are two physical properties that can be used?