Q: what is the precision of the graduated cylinder? please show solution. thank you!
A: The solution is given in the following steps:
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A: ✓Pipetting at a constant temperature can improve accuracy by up to 5 %. Allow time for equilibration…
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Q: why do you calibrate thermometers and pipets?
A: Calibrate means correlate the result with standard instruments reading.
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A: Precision in the measurement.Graduated cyllinder is least precise, followed by more precise burette…
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A: The most common types of secondary structures are the α helix and the β pleated sheet.
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A: According to the question, IN A CRYSTAL, ENERGY 'E' REQUIRED FOR DEFORMATION CAN BE CALCULATED USING…
Q: (iv)
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A: There are various apparatus that is used in a chemistry lab while doing an experiment. Few examples…
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Q: Lubricants are substances with high ____________ that reduce friction between working parts.
A: The substances which are used to reduce the friction between the moving surface is known as…
Q: Pb2+(aq) + 2 e → Pb(s) Br2(0) + 2 e* → 2 Br(aq) E° = -0.13 V E° = +1.07 V
A: Given data are as follows:
Q: What are the importance of performing tablet diameter and thickness tests?
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Q: .How many types of hardness Two. O Three. O Four. O
A: There are two types of hardness, Temporary hardness Permanent hardness
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A: Errors that generally can be determined not while it occurs but visible in results either while…
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A: The products of the chemical industry can be classified as fine chemicals and bulk chemicals.
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Q: Red-Eared Sliders are illegal in California true or false?
A: true
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A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: ds Iitensive or extensive. Intensive Extensive Answer Bank temperature color volume boiling point…
A: The physical properties which does not depend on the amount of matter are termed as intensive…
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A: To determine the number of significant digits .
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Q: n is used in chemistry laboratory ass rod with bulb. 100
A: False . It is called as pipette used in Chemistry laboratory.
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A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
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A: MAIN USE OF HIGH PERFORMANCE LIQUID CHROMATOGRAPHY ARE IDENTIFYING ,QUANTITATIVELY AND PURIFYING…
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A: To determine the mean and standard deviation for each treatment. The mean is the sum of all the…
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A: In the preparation of the organic or inorganic compound, the compound formed is a precipitate. The…
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Q: Which one hardness type that remain .after boiling process Temporary hardness. Permanent hardness.
A: There are two types of water hardness; Temporary hardness Permanent hardness
Q: How many types of hardness. Two. Three. Four.
A: The hardness of water is the salt of magnesium and calcium.
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Q: what is the precision of the 3 graduated cylinders? show solution.
A: Here, volume of cylinder 1 = 100 mL Volume of cylinder 2 = 3mL Volume of cylinder 3 = 0.3 mL
Q: as a laboratory analyst how can you reduce your waiting time during filtration
A: Filtration is done so as to avoid The unwanted side products .
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A: Minor angle changes every time to read volume.
Q: Why is the pipette more precise than a burette when measuring?
A: Burettes are larger than a pipette, it has a stopcock at the bottom to control the release of…
Q: assify each property as intensive or extensive. Intensive Extensive Answer Bank hardness volume…
A: An intensive property is one that does not depend on the mass of the substance or system. Example :…
Q: Which one hardness type that remain after boiling process. O Temporary hardness. O Permanent…
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- Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed (Precipitate)Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed (Precipitate) 2 Fe is sought(Analyte), 1Fe2O3 is weighed (Precipitate)A STOCK SOLUTION containing 0.1581 g/L K2CrO4 was prepared.In order to make the CALIBRATION STANDARD, 5 ml of the STOCK was transferredinto a 50ml volumetric flask and then diluted with an appropriate solvent.Calculate:(a) The ppm of K2CrO4 in the CALIBRATION STANDARD.(b) The molarity of K2CrO4 in the CALIBRATION STANDARD. (c) Calculate the molar absorptivity of K2CrO4 (at 371.0 nm). Assume that Beer's Law isobeyed over this concentration range.At 371.0 nm, this CALIBRATION STANDARD in a cell of path length 1.00 cm gave a %T of 59.752.
- A 0.1 M solution of acid was used to titrate 10 ml of 0.1 M solution of alkali and thefollowing volumes of acid were recorded: 9.88 10.18 10.23 10.39 10.21 Calculate the 95% confidence limits of the mean and use them to decide whetherthere is any evidence of systematic error.a) What mass of Fe(NH4)2(SO4)2•2H2O(s) is required to prepare a 500 mL solution containing 100 ppm (m:v) in Fe? b) Using this stock solution, what aliquot must be used to prepare calibration solutions, 100 mL volume, of the following concentrations: 0.100 ppm, 0.500 ppm, 2.00 ppm, 4.00 ppm, and 7.00 ppm.A 500ml solution of NaOH was made using 2g of NaOH(s) Three trials of titration were made with using KHP(s) as the acid dissolved with about 25ml of deionized water and 4 drops of phenolphthalein indicator. Slowly adding the NaOH solution until the clear solution had turned pink which would give us our end point and allow us to find the NaOH molarity by equivalence point. Trial 1: - 0.484g of KHP were used - initial volume of buret containing NaOH solution was 0.0 ml - final volume of buret was 23.60ml Trial 2: - 0.485g of KHP were used - initial volume was 0.0ml - final volume was 24.00ml Trial 3: - 0.486g of KHP - initial volume was 0.0ml - final volume was 23.80ml The molarity of NaOH was found by using the moles of KHP(as at equivalence, both solutions are balanced in moles) divided by the total volume of NaOH used to neutralize the solution. Giving us 0.100M for trial 1, 0.099M for trial 2, and 0.100M for trial 3. Make a rough sketch of a titration curve that…
- A sample is analyzed for chloride by the Volhard method. From the following data, calculate the percentage of chloride present:Weight of sample = 6.0000 g dissolved and diluted to 200 mLAliquot used = 25.00 mL AgNO3 added = 40.00ml of 0.1234MKSCN for back titration = 13.20ml of 0.0930M2.) A 0.2185g sample of NaCl was assayed using Volhard Method with 50mL 0f 0.0998N AgNO3 and 11.9mL of 0.1350N NH4SCN. Calculate the % NaCl in the sample.PS. Further values required for the solvings are give in the various situations below. (ANSWER) Situation: A community in a mountainous area of Bohol uses water collected from a nearby natural spring. A sample was submitted to a laboratory for the analysis of its total hardness. Required: SHOW YOUR COMPLETE CALCULATIONS. BASED ON THE IMAGE PROVIDED BELOW FOR THIS QUESTION: Calculate the amount of titrant used in each trial to reach endpoint. Report total hardness of the sample as mean ±sd. a. 250.0 mL of 500.0 ppm of CaCO3 solution from a primary standard (assume solvent is distilled water only). Answer : Mass of CaCO3 = 0.125 g b, The EDTA solution was standardized by titrating it with a 25.0 mL aliquot of the CaCO3 solution. How much of the titrant was consumed. Answer: Volume of EDTA consumed = 12.405 g c. Calculate the average titer (mg CaCO3/mL EDTA). Mass of CaCO3 in 25 mL CaCO3 solution: 0.0125 g Answer: 1.008 mg CaCO3/ mL EDTA
- In how much volume of diluted sulfuric acid should you dissolve a multivitamin tablet of approximately 1700 mg of Vitamin C to back analyze 10.00 mL of that solution, with 25.00 mL of 0.01 M KIO3 and 0.04 M thiosulfate to use approximately 8-10 mL of titrant ? You have 25, 50, 150, 250 and 500 mL flasks.SCE students measured the concentration of HCl in a solution by titrating with different indicators to find the end point.Indicator Mean HCl concentration (M)(± standard deviation)Number of measurementsBromothymol blue 0.09565 ± 0.00225 28Methyl red 0.08686 ± 0.00098 18Bromocresol green 0.08641 ± 0.00113 29Is the difference between indicators 1 and 2 significant at the 95% confidence level? Answer the same question for indicators 2 and 3A 320.00 mL solution of 0.00290 M AB2 is added to a 260.00 mL solution of 0.00235 M C3D2. What is pQsp for A3D2?
