Blood Lab

1. Solubility Test Table 1. Results for the solubility test. OBSERVATION* INFERENCE SAMPLE Ethyl acetate ** Нехаne Methanol Water Coconut oil Vitamin E Beef fat Miscible (soluble) or immiscible (insoluble) ** polar or nonpolar Sudan IV Test Table 2. Results for Sudan IV test. OBSERVATION* INFERENCE SAMPLE Нехаne Ethyl acetate Methanol Water ** Coconut oil Vitamin E Beef fat Homogeneous or heterogeneous mixture ** polar or nonpolar

A sample is analyzed for Pb. Is the ppm in a dry sample greater than, equal or less than to the ppm, in wet sample?

To which sample solution the spike will be add?  the distillate>130C the mass standard the distilled <130C

Which is not required in recrystallization? a. solution is filtered at high temperature b. moderate volatility solvent c. saturated solution d. solvent must dissolve the impurities

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…

Preparing solution. Weigh out Sg of table salt. Dissolve it in 50mL of distilled water in a container using a stirrer and label appropriately. Calculate the concentration in terms of percent mass per volume. If you pour the 10ml hydrochloric acid into50ml distilled water Calculate it concentration in terms of percent volume acid per total volume.

Please don't provide hand writtin solution..... I need Explation solution and step solution...

Standardization of 0.10 M HCl1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the prepared 0.10 M HCl solution until phenolphthalein endpoint.4. Record the final burette reading for each titration in your data sheetDetermination of Ksp and Molar Solubility1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved. 2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask using a pipette.3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint is achieved.4. Record the volume the HCl solution used. Perform two more trials.…

15. These are samples of about the same size that are carried through an analysis in exactly the same way.A. TitrateB. AnalyteC. ReplicatesD. Distillate

Standardization of 0.10 M HCl1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the prepared 0.10 M HCl solution until phenolphthalein endpoint.4. Record the final burette reading for each titration in your data sheetDetermination of Ksp and Molar Solubility1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved. 2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask using a pipette.3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint is achieved.4. Record the volume the HCl solution used. Perform two more trials.…

part A 1. Concentration of Known NiCl2 Stock Solution ___500________ mM   Tube Number   Blank #1 #2 #3 #4 #5 2. Volume of Known NiCl2 Stock Solution Pipetted Into Tube 0.00 mL 1.50 mL 3.00 mL 4.50 mL 6.00 mL 7.50 mL 3. Volume of Distilled Water Pipetted Into Tube 11.00 mL 9.50 mL 8.00 mL 6.50 mL 5.00 mL 3.50 mL 4. Total Volume of Solution In Tube 11.00 mL 11.00 mL 11.00 mL 11.00 mL 11.00 mL 11.00 mL 5. Diluted Concentration of NiCl2 In Tube ----------- 68.2 mn 136mn 204mn 273mn 341mn 1. Equation for the Best-Fit Straight Line Y=3822x+4.7446 2. Absorbance at λmax for Diluted Unknown 0.87 3. Concentration of NiCl2 in Diluted Unknown 25.693 mM Determine the dilution factor for your diluted unknown U1 based on how you prepared the solutions in Part A. Record this on your report sheet in Part D #4.

In a thin layer chromatography (TLC) experiment, solute A traveled 20 mm while solute B traveled 30 mm. The solvent traveled 40 mm. Which has the greater affinity for the solvent? a. not enough data b. solute B c. solute A d. both A & B have equal affinity

Concentration of Acetic Acid in a Vinegar Solution. Average molarity of NaOH Volume HC₂H30₂ sample Final buret reading Initial buret reading Volume NaOH (Show all units and all calculations) Molarity of HC₂H30₂ (unrounded) Average molarity of HC₂H302 (unrounded) Deviations Average deviation Best estimate for molarity of HC₂H302 Average mass percent HC₂H302 46.4mL Oml Ran out of Base ↓ ↓ ↓ ↓ 10.014 HOA je beart giov isults weari?! ferottelucuny Cambia) 10 Kousad Question 1. A Rolaids tablet contains calcium carbonate that neutralizes stomach acid. If 44.55 mL of 0.448 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in a Rolaids tablet? CaCO, (s) + 2HCl(aq) → CaCl₂ (aq) + H₂O (1) + CO₂ (g)

Please don't provide hand writtin solution.....   I need explation and step solution.....

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

b. How would a student prepare 25.0 mL of 40.0% standard solution from a 100.0 % stock solution. What is the volume of stock solution needed? a. 10ml b. 20ml c. 25ml d. 15ml Please show work

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.

What lab equipment is used to manually stir solutions? O a. thermometer O b. striker O c. stirring rod O d. forceps

A water sample B has a turbidity reading of 50 NTU. If a 50-ppm standard has a turbidity reading of 100 NTU, what is the concentration of the analyte in A that causes the water to be turbid? a. 50 ppm b.100 ppm c. 75 ppm d. 150 ppm e. 25 ppm

1. Which method can be used to remove temporary hardness but not permanent hardness from a sample of water? A. Washing sodaB. Ion-ExchangeC. Boiling 2. What can be used to identify whether a sample of water is hard or soft? A. Detergent solutionB. Soap SolutionC. Bromine waterD. Option 4 3. Which of the following is not a unit of hardness? A. Parts per millionB. Degree centigradeC. Degree clarkeD. Degree French

1. The time it takes for the crushed antacid/chalk to be dissolved in vinegar is greater than the dissolution time of antacid/chalk at room temperature water. A. True B. False 2. The broken antacid/chalk dissolved slowest in hot water than in room temperature water. A. True B. False 3. Comparing the dissolution time in a whole antacid/chalk, it is relatively slowest in room temperature water. A. True B. False

Table of chemicals and reagents with their physicochemical properties (name, molecular formula, molecular weight, pKa, melting point, boiling point, etc.) Write a short outline or a flow diagram of the procedure List and safety issues Read and understand the MSDS information for each chemical used in this practical Experimental procedure Please do not scratch the clear sides of the UV cuvettes as this will invalidate your results. Part 1: Preparation of a calibration curve A calibration curve should be constructed using at least five concentrations of the pure paracetamol standard supplied in the range 3-15 ug/mL as follows: Weigh about 150 mg of paracetamol accurately and transfer to a 200 mL volumetric flask. Add 50 mL of o.1 M NaOH and dilute to about 100 mL with deionised water (DI). Shake and make up to volume with DI water. Dilute 10 mL of the resulting solution to 100 mL (volumetric flask) with DI water (= stock solution). Prepare standard solutions containing 3, 6, 9, 12 and 15…

Alligation Medial and Alligation Alternate. Show your complete solution. 1. How many mL of 70% ethyl alcohol and 30% ethyl alcohol should be mixed to prepare 100mL of 60% ethyl alcohol? Volume of 70% ethyl alcohol = ? Volume of 30% ethyl alcohol = ?

2 Trial 1: [4] Volume of NaOH, dispensed (mL) Trial 1: [5] Molar concentration of NaOH (mol/L) Trial 2: [4] Volume of NaOH, dispensed (mL) How Trial 2: [5] Molar concentration of NaOH (mol/L) Trial 3: [4] Volume of NaOH, dispensed (mL) Trial 3: [5] Molar concentration of NaOH (mol/L)

How many milliliters of a 17% w/v concentrate of benzalkonium chloride should be used in preparing 150 mL of a stock solution such that 15 mL. diluted to 1 liter will yield a 1:5000 solution? A. 2 ml. B. 23.5 mL C. 11.75 ml. D. 0.2 mL

For a polluted soil by crude oil. best method to wash it is by using O a. EDTA O b. NaOH O c. Surfactant O d. HCI CLEAR MY CHOICE

3. The Maximum Acceptable Concentration (MAC) of Pb in drinking water is 10 ppb. If a sample hasconcentration of 65 nM, what will be the concentration in ppb and does it exceed the MAC?a. 8 ppb, no it didn’t exceed the MACb. 9 ppb, no it didn’t exceed the MACc. 12 ppb, yes it exceeds the MACd. 13 ppb, yes it exceeds the MAC

How many milliliters of a 1:50 wiv boric acid solution can be prepared from 500 mL of a 12% w/v boric acid solution? a. 2500 mL Ob.60 mL Oc. 1200 ml Od. 3000 ml O e. 30 mL

pls help and show solution plsss

1. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1500 M CaCh2 Solve for the concentration of the stock solution in M. 2. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1200 g CaCl2 Solve for %w/v CaCl2 in the stock solution.

8. Find the final concentration of ethanol as a percent (v/v) when 30 mL of ethanol 50 % (v/v), 60 mL of ethanol 70 % (v/v), and 40 mL of ethanol 95 % (v/v) are mixed together.

What is the major difference in set up between a simple distillation and a fractional distillation? O A. A fractionating column used during fractional distillation B. Simple distillation does not need a condenser. OC. Fractional distillation needs a longer fractionating column. D. There is no difference in set up between a simple distillation and a fractional distillation,

The question is : Using benzoic acid's solubility data in water (found in pre-lab), calculate the amount of hot water needed to dissolve your crude benzoic acid. Based on your data and observation, explain why you may have used more ore less water than the calculated value.   Pre lab Question: calculated amount of hot water to dissolve 2.0g of benzoic acid. => (2.0g benzoic acid)/( 68 g/L)(1000ml)/(1L) = 29.4 mL of hot water needed to dissolve 2.0g of benzoic acid. My cruse of benzoic acid is 1.81g.