A sample containing an unknown quantity of cadmium in a water sample gave a reading of 1.4 in an atomic spectrometer. The sample was spiked with a 2 ppm mercury standard and gave a reading of 2.5. The instrument give a reading of zero with no sample. What is the concentration of cadmium in the unknown sample?

Q: The instructor reveals that the weak acid is hypochlorous acid, HOCl. The known Ka for HOCl is…

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Q: On their second titration trial, the CHM 111 student recorded an Initial titrant volume of 9.95 mL…

A: Given : Initial titrant volume = 9.95 mL And final titrant volume = 29.80 mL

Q: The formula weight of CaCO3 is 100.087 ±0.004 g/mol. You are preparing a standard solution of CaCO3…

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Q: Chemistry Given the following spectrophotometric data, what is the concentration of the sample?…

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Q: how do you get the caco3 conc molarity? which is 0.01463 m

A: The molarity of a solution is defined as the moles of solute per liter of solution. Mathematically,…

Q: Following the directions in the laboratory manual, you create Standard 2 by transferring the…

A: Calculate the total volume of mixture of solution in the test tube. i.e.…

Q: Based on the analysis of a vinegar solution via titration with 0.1 M NaOH. Results are as follows:…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer,…

A: Answer :- Part A :- M1V1 = 0.0514 (mol) Part B :- V1 = 6.42 (mL) Part C :- Original Concentration Of…

Q: In a similar experiment, the mass of 3 PB tablets was measured to be 3.1177 g. The tablets were…

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Q: Analysis of several plant-food preparations for potassium ion yielded the following data: Sample…

A: As per our company guidelines we are supposed to answer the first question only as it is a lengthy…

Q: A solution of HNO3HNO3 is standardized by reaction with pure sodium carbonate.…

A: To determine the molarity of the HNO3 solution and the absolute uncertainty associated with it. The…

Q: A group of students titrate a calcium carbonate standard solution repeatedly in five experimental…

A: Average concentration = 80.5 ppm Standard deviation = 0.5 ppm Confidence interval = 95% Number of…

Q: For Questions 20-24 consider the following scenario: A 0.8390 g of an unknown sample containing…

A: Your answer is correct. The explanation is given here. The sample containing chloride ion reacts…

Q: Trial 1 Trial 2 Trial 3 Volume of Sample (mL) 55.00 55.00 55.00 Final Volume of EDTA (mL) 7.90 15.40…

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Q: Give the standard deviation of these three molaritys.    0.0366 0.0373 0.0370

A: Standard deviation:  Standard deviation tell about the variability(error) in data set. If standard…

Q: Question 4. New December 18, 2020. The nitrite in a series of standard solutions (mg/L, n = 5) are…

A: Absorbance is the fraction of intensity of light that is absorbed by a material .  According to…

Q: A student creates a calibration plot for serial dilutions of Cu(NO3)2. A graph of concentration in M…

A: (a) y = 0.345x -0.11 Absorbance = y = 0.655 0.655 = 0.345x -0.11 x = 2.22 M   (b) Molarity = Mass %…

Q: A solution of Ba (OH), was standardized against 0.1208 g of primary-standard-grade benzoic acid,…

A: Given 0.1208 g of benzoic acid, volume of base = 43.94g  We have to find molar concentration of base…

Q: 1. In this experiment, you will make a set of solutions containing different concentrations of…

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Q: for density is M/\ Calculate the molarity of solution prepared by weighing 6.34 g of NaOH using a…

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Q: Q3/ A) 0.63 g of a sample containing Na,CO3, NaHCO, and inert impurities is titrated with 0.2 M HCI,…

A: The question is based on the concept of titrations. we have to estimate amount of sodium carbonate…

Q: A 2.0 g of MgCO3 was dissolved and diluted to exactly 500-mL volumetric  flask. If 50-mL aliquot was…

A: Mass of MgCO3 = 2g Mol. Mass of MgCO3 = 84g/mol Volume of dilution = 500ml Volume of aliquot = 50ml…

Q: The analysis shows different concentrations based on replicate determinations of Zn in a water…

A: Absolute error is the difference between the measured value and actual value. Its modulus i.e.…

Q: 1. (a) A solution of NaCl is prepared by dissolving 0.0056 g NaCl with enough H2O in a volumetric…

A: Solution 1- Concentration is calculated in terms of molarity =number of moles of solute /volume of…

Q: You begin preparation of the calibration curve to measure absorbance vs concentration of FeSCN2+. To…

A: Molarity is the way of expressing concentrations which is defined as moles of solute dissolved per…

Q: The lead level in a sample of contaminated soil was determined using AAS. 2.0 g sample was dissolved…

A: Atomic Absorption Spectroscopy is a technique for rapid trace metal analysis. It is an easy, and…

Q: Six clean, dry, 18 x 150mm test tubes 1-6 was labeled.  5.00 L of 2.00 x 10-3 M Fe(NO3)3 solution…

A: Please note the typo in your question.  Actually, we have to add, 5.00 mL, NOT 5.00 L of 2.00 x 10-3…

Q: Suppose that you used smaller volumetric apparatus to prepare 0.250 M NH3 solution by diluting 84.6…

A: According to the question we have, The volume of NH3 solution =  V1= 84.6(±0.8) μL= 0.0846 (±0.8) ml…

Q: Show your complete solution and round-off your answers to four decimal places.   A 0.1093-g sample…

A: Number of mmol = Molarity x Volume (mL) Na2CO3  +  2AgNO3  ----->  2NaNO3  +  Ag2CO3 KSCN  +…

Q: A 0.2 g sample of NazC204 consumed 30.92 mL of KMNO4 to reach the faint pink endpoint in the…

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Q: 25 ml of pickled brine was taken from an apple pickled with vinegar and diluted to 500 ml, 25 ml of…

A: The dilution law is shown below: N1V1 = N2V2 where; N1 = normality of unknown acid/base V1 = volume…

Q: A solution of FESCN2+ has a concentration of 1.00 x 10-4M and an absorbance of 0.755. What is the…

A: Given, A1 = 0.755 A2 = 0.491 C1 = 1 X 10-2 C2 = ? To calculate C2.

Q: The pH of a solution is 5.30 + 0.01. What is the concentration of H* in the solution and its…

A: Given data is as follows: The pH of the solution =5.30±0.01 As we know that; pH=-logH+ The hydronium…

Q: The pH of a solution is 5.84 + 0.05. What is the concentration of H* in the solution and its…

A: From given datas  Molar concentration of H+ and absolute uncertainty is calculated with suitable…

Q: Starting from the primary standard solution in Question 4 and using the dilution scheme in Figure 1,…

A: The amount of solute that is dissolved in a specified volume of a solvent yields a solution. The…

Q: If you use [KMnO4]=0.0252 M, Concentration of FeSO4 7 H2O = 5.70 g/L Using a 100-mL graduated…

A: Conc of SnCl2.H20 = 2.85 gm/ml Molecular weight of SnCl2.2H20 = 225.65 gm.So, Conc of SnCl2.H20 =…

Q: The fictitious salt MX₂ has a Ksp of 5.0 x 10-10. If 19.1 mL of a 0.0010 M solution of M2+ and 15.0…

A: Answer: For a sparingly soluble salt it is considered that all its dissolved part its in ionized…

Q: A stock solution of 0.225 +/- 0.003 M NaNO2 was transferred to a 100 mL volumetric flask (class A)…

A: Given that, Concentration of stock NaNO2 = 0.225 ± 0.003M 7 ml of stock NaNO2 is added to 100 mL…

Q: What is the practical application of gravimetric method of analysis

A: Gravimetric analysis is the quantitative analysis of an analyte. The composition of the materials…