Q: Although there are energetically advantages in recycling aluminum Discuss the belief that secondary…
A: Answer is given below
Q: Match Column A with Column B. uses a graphite-coated furnace to vaporize the sample A. GFAAS samples…
A:
Q: Product: Nail Cutter 1. Why did we use metal in making nail cutterl? Why not ceramics or polymer?…
A: The solution is shown below
Q: Which of the following casting technique is used for a metallic product that requires high…
A: Die - casting, investment casting, plaster casting, and sand casting, each provide their own unique…
Q: diffrentiate between cast iron and pig iron.
A: Extraction is the process in which a metal is extracted from its ore. Cast iron and pig iron are…
Q: What is the effect of growing the grains in a polycrystalline metal? Select an answer and submit.…
A: The strength of polycrystalline materials is increased by reducing their grain size. ...…
Q: i) ii) Steel essentially contains a) 80% or more iron b) 50% or more iron c) Alloying elements like…
A: The above questions can be answered as
Q: A type of cast iron containing 3.1-4 wt% C and 1.7-3 wt% Si. * a. Compact graphite b. Malleable…
A:
Q: The best conductor for electron flow is what type of metal? a. tin b. bronze c. copper d.…
A: Given, a. tin b. bronze c. copper d. silver
Q: You wish to fabricate sunglasses that consist of a plastic covered with a semi transparent metal…
A: Physical vapor deposition (PVD) is the best method for depositing the thin metal films on other…
Q: How are impurities separated from bauxite ore to get pure alumina?
A: To find: How are impurities separated form the bauxite ore to get pure alumina
Q: What is the most economical fabrication technique? forging casting 3D-printing powder metallurgy
A: A multiple choice question about fabrication techniques, which is to be accomplished.
Q: True or False 1. Magnetite is not susceptible to residual concentration. 2.Copper is susceptible to…
A: Residual concentration is the accumulation of valuable minerals on rocks or surfaces which has been…
Q: sources of error of determination of iron in iron ore
A: Impurities in the iron from the Blast Furnace include carbon, sulphur, phosphorus and silicon. These…
Q: what is the aqueous NH3 test used for in the copper cycle experiment?
A: 1) To small drop of the solution and add it to some concentrated ammonia in a beaker or test tube.…
Q: Heating pyrites to remove sulphur is called:(a) Smelting(b) Calcination(c) Liquation(d) Roasting
A: The process to remove sulfur from pyrites is called Roasting. Option (d) is correct.
Q: actually removing: a. all of the choices here are acceptable b. the impurities c. the oxides d.…
A: Magnesium ribbons contain a layer of magnesium oxide.
Q: Why do you apply paint an iron articles?
A: Paint is applied to the iron articles to prevent them from corrosion by rust.
Q: Reasons why ore must be screened?
A: Ores must be screened due to the following reasons.
Q: Analyze the use of austenitic or ferritic steels in irradiation damage resistance applications in…
A: Austenitic is a type of stainless steel and has the structure of face center cubic. The structure is…
Q: What is the procedure for heating the metal sample to an exact but measured temperature?
A:
Q: Calmagite is often used as a substitute for Eriochrome Black T as indicator in the determination of…
A:
Q: What minerals used in glossy paper?
A: Answer - Kaolin Minerals like clay, mica, talc and baryte are mixed with wood pulp to make paper.…
Q: 1. The plates were "pre-baked" at >120°C. Why is this step necessary?
A: 1. It is necessary otherwise it will create problem during TLC. Solvent will not move properly. So,…
Q: 17. This is used as intermediate to produce malleable cast iron. * O Grey cast iron White cast iron…
A:
Q: Some options Choose Correct option for the main hardening those in cement s. a) Trucall ciam…
A: The hardening of cement is basically due to the hydration of the compounds present in the cement…
Q: What is chrome plating or electroplating? Briefly explain how this process works.
A: The chrome plating can provide corrosion resistance and helps in easing the cleaning procedures. It…
Q: They are made of matrix and reinforcing material. O Minerals O Composites Compounds O Alloys
A: Composite material produced from two or more constituent materials. minerals are made of chemical…
Q: b) Diamond is a strong and hard material that does not conduct electricity. Verify this statement.…
A: Diamond is crystalline allotrope of carbon.It is a good conductor of heat but bad conductor of…
Q: Anode deposition technique is used to prepare thin films of polymers. * true OError
A: Yes ,thin film of polymer is deposited on anode in this method.
Q: type of cast iron containing 3-4 wt% C and 1-3 wt% Si. a. Compact graphite b. Malleable cast iron…
A:
Q: recovery boilers the bottom ash hoved as molten ash in perature of about 00-500 °C 00-600 °C 00-700…
A: Ash are the solid remnants of fires.
Q: Write any four applications of Aluminum Alloys
A: Alloy : Homogeneous mixture of a metal with other metals is called as an alloy. Some common…
Q: The standard addition technique was used for the voltammetric analysis of a Cd2+ sample. From the…
A: If we plot the curve, we got this
Q: Place the metal solutions you tested in order of increasing energy based on the colors observed in…
A: 1st part: Colour of LiCl flame is red 2nd part: Colour of NaCl flame is Golden yellow. 3rd part:…
Q: >Why was copper one of the first metals that humans used?
A: Copper is considered to be one of the first metals to be used by humans. The main reason for its…
Q: <p>List the properties of copper that make it appropriate for electric wires and the…
A: Copper is widely used in our daily lives for making electric wires and water pipes.This is because…
Q: 3. Which property or minerals is the least reliable? Luster O Hardness Scratch Test
A: and crystal structure. Properties of minerals means their chemical composition ( from which they…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- A student prepared a calibration plot for a series of iron(II)-1,10-phenanthroline complex standards. On the x axis is Fe concentration in ppm. On the y axis is the absorbance (M). The plot's equation is y = 0.2471x + 0.006 What is the ppm absorptivity of this solution if the pathlength of light is 1 cm?Which of the following statements about 10Dq is false? A. [VCl6]2- has a greater 10Dq than [VCl4] complex.B.[MnF6]2- has a higher 10Dq value than [TcF6]2-.A. [V(H2O)6]3+ has a higher 10Dq value than [V(H2O)6]2+.D. In the [CoX(NH3)5]n+ complex, the color changes from dark violet to yellow when X is replaced by I-, Br-, Cl-, H2O, and NH3, respectively.You have been sent to India to investigate the occurence of goiter disease attributed to iodine deficency. As part of of your investigation, you must make field measurements of traces of Iodide(I-) in groundwater. The procedure is to oxidize I- to I2 and convert the I2 into an intensely colored complex with the dye brilliant green in the organic solvent toluene. a) A 3.15x10^-6 M solution of the colored complex exhibited an absorbance of 0.267 at 635nm in a 1.00cm cuvet. A blank solution made from distilled water in place of groundwater had an absorbance of 0.019. Find the molar absroptivity of the colored complex. b)The absorbance of an unknown solution prepared from ground water was 0.175. Find the concentration of the unknown.
- Scott test is one of the methods used for screening for Cocaine in Forensic Chemistry. The multi step method consists of a) reacting the sample drug with cobaltous thiocyanate b) dissolving of the formed precipitate by adding HCl and c) extraction of coordination compound with Chloroform d) measurement of absorbance of extracted coordination compound at 627 nm All the reactions in this multistep method are not fully understood. However, it was determined that there are 2 moles of cocaine in coordination compound measured in last step. If coordination compound is represented as “Scott” coordination compound, which of the following is correct “stoichiometric” factor to get mass of cocaine from mass of measured complex ? a.g (Scott coordination cpd) * MM (Scott coordination cpd) MM (cocaine) b.g (Scott coordination cpd) * 2 *MM (Scott coordination cpd) MM…The red color of soil is often due to the presence of iron. Metal ions are extracted from soil by stirring the soil in acid and then filtering the solution. One method for the analysis of Fe2+ is to form the highly colored Fe2+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of a 10.0 ppm working solution of Fe2+ into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the standards are measured. a)What is the effect on the reported concentration of iron in the sample if there is a trace impurity of Fe2+in the ammonium citrate?The red color of soil is often due to the presence of iron. Metal ions are extracted from soil by stirring the soil in acid and then filtering the solution. One method for the analysis of Fe2+ is to form the highly colored Fe2+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of a 10.0 ppm working solution of Fe2+ into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the standards are measured. a)Use the data table below to prepare a calibration curve (absorbance versus concentration in ppm). Fit the data to straight line and find the equation for the straight line and the R2 value. (Hint: Think about what to do with the absorbance of the blank.)
- Poly (ethylene oxide), PEO (Tg = -60oC), is able to complex with cations such as Li+ and Na+, and such systems have potential interest as battery electrolytes. What would you expect about the Tg of the PEO complex? a. the Tg of the PEO complex to be higher than the pure polymer Tg b. the Tg of the PEO complex to be lower than the pure polymer Tg c. Both the PEO complex and pure polymer have same Tg d. None of the aboveCation Elimination Test ObservationsAdded Reagents and their ObservationsNaOH = Light blue pptExcess NaOH = undissolved pptNH3 = Blue pptExcess NH3 = Dissolved precipitation ; deep blue complex1. What are the possible Cation/s present?Cu2+ , Zn2+ , Ca2+ , Fe3+ , NH4+ Cation Confirmatory test ObservationsAdded Reagents and Observation:Excess NH3 = Dissolved precipitation ; deep blue complexKSCN = NVRK4Fe(CN)6 = NVRK4Fe(CN)6 = NVRNa2C2O4 = White precipitationNaOH (in evap dish) = NVR2. what are the possible ion/s present? Show a flowchart.Cu2+ , Zn2+ , Ca2+ , Fe3+ , NH4+You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standard Fe3+ solution with a concentration of 5.74×10−4 M. You treat 14.0 mL of this reference with HNO3 and excess KSCN to form a red complex and dilute the reference to 60.0 mL. The diluted reference is placed in a cell with a 1.00‑cm light path. You then take 30.0 mL of the well water, treat with HNO3 and excess KSCN, and dilute to 100.0 mL. This diluted sample is placed in a variable pathlength cell. The absorbance of the reference and the sample solutions match when the pathlength is 1.76 cm. What is the concentration of iron in the well water? For each solution, the zero is set with a blank.
- You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standard Fe3+ solution with a concentration of 5.53×10−4 M. You treat 10.0 mL of this reference with HNO3 and excess KSCN to form a red complex and dilute the reference to 45.0 mL. The diluted reference is placed in a cell with a 1.00‑cm light path. You then take 20.0 mL of the well water, treat with HNO3 and excess KSCN, and dilute to 100.0 mL. This diluted sample is placed in a variable pathlength cell. The absorbance of the reference and the sample solutions match when the pathlength is 3.25cm. What is the concentration of iron in the well water? For each solution, the zero is set with a blank.Aluminium (III) reacts with the Chelating agent HL to give a complex AlL3 that is readily soluble in CHCl3. A spectrophotometric study shows that when a 1.77 x10-4 M aqueous solution of aluminium was extracted with CHCl3 containing 0.01M HL, the analytical concentration of aluminium at pH 4.5 in the two phases were 1.5 x 10-4 M [Al3+]upper) and 2.73 x10-5 M ([AlL3]lower) . What is the distribution coefficient at pH 4.8.Explain the role of potassium hexacyanoferrate(II), K4[Fe(CN)6] as a component of the Benedict’s reagent for the Estimation of Glucose