Identify and explain the mistakes made in the following laboratory protocols:  A 1250 mg sample of NaOH was weighed using an analytical balance. The pellets were directly transferred in the balance pans, pellets were gradually added until the reading of the balance was near to 0.2000 mg.

Q: How many grams of NaAsO, should be weighed out to prepare a stock solution of 100 mg/L in 500 mL…

A: A numerical problem based on stock preparation, which is to be accomplished.

Q: copper(II) nitrate + sodium hydroxide> Balanced equation Phase Турes Total Eqn Net Eqn Observation

A:

Q: To adjust the thiosulfate (S2O3) solution to be used as a titrant in the copper determination,…

A:

Q: To make a calibration curve, you would first make a stock solution. Determine the mass of copper(II)…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

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

A: The mass of magnesium carbonate present in 500 mL solution is = 2.0 g The mass of magnesium…

Q: The procedure for the synthesis of menthone indicates that you should use 10 cm³ of 6M sulphuric…

A: Given that : The volume of the sulfuric acid to be used = 10 cm3 The molarity of sulfuric acid to be…

Q: Which of the following statements is true? A Liquids can be weighed using a weighing paper. B In…

A:

Q: one of the following is primary standard for iodine O a. potassium hydrogen phthalate b. sodium…

A: Standardization is the process of determining the exact concentration of the solution. Primary…

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: 5. Why is decantation rather than filtration the preferred method of separating the salt from the…

A:

Q: I.A Study of Intermolecular Forces of Attraction Professor Rowan is preparing for his experiment in…

A:

Q: To prepare a standard solution of Mn2+, a 0.250 g sample of Mn is dissolved in 10 mL of concentrated…

A: Given :  0.25 g = Mn = 250 mg 10 ml = HNO3  and the solution transferred to 100 ml of volumetric…

Q: 0.498-g sample of sodium carbonate required   22.6 mLmL   mL of a sulfuric acid solution to reach…

A:

Q: mg Cefuroxime Sodium Powder for Injection with 6mL of sterile water for injection. The reconstituted…

A: Cefuroxime is an antibiotic and is a type of second generation cephalosporin and used for treatment…

Q: A student investigated the stoichiometry of the reaction of zinc (Zn) with HCl solution and reported…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: 7 determination of sodium, potassium and calcium in water samples by ICP-OES. 1. kindly assist me…

A: AIM - DETERMINATION OF SODIUM, POTASSIUM AND CALCIUM IN WATER SAMPLE BY ICP-OES . 1)What is ICP-OES?…

Q: In volumetric analysis, the mass is measured to calculate the concentration of the analyte Select…

A: In volumetric analysis, volume of a solution is measured to calculate the concentration of analyte.

Q: prepare 0.9% potassium Chloride (KCI) in 0.5 liter ?

A:

Q: In the acetic acid determination in vinegar experiment; NaOH was standardized with 0.25 g KHP (molar…

A:

Q: What are the following? In each case, give a short answer. Two examples are qiv Example 1: 'н, "н,…

A: The question is based on the concept of physical chemistry. we have to describe the options given…

Q: trial molarity of Hci molarity of NaOH volume of HCI volume of NaOH 1 1M 2M 200mL 200mL 2 1M 1M…

A: Limiting reagent is the species which present in lesser amount and get completely consumed during a…

Q: Identify the type of error (systematic or random) for each of the following situations below and…

A: Systematic error : it is repeatable error and consistent . it can be done by the analysts . it comes…

Q: Which of the following statements is true? A Liquids can be weighed using a weighing paper. B In…

A: Find out the true sentence from given four sentence and explain why it is correct while others are…

Q: A mixture contains Na2CO3, NaOH, and inert matter. A sample weighing 1.500 g requires 28.85 mL 0f…

A:

Q: Part B - Determination of Mg(OH)2 in Milk of Magnesia Mass of sample 50g Total Volume HCI used 80ml…

A: Total moles of HCl used can be given by using the following formula.                       Number of…

Q: 10. According to the literature, when the product AMEVIVE (alefacept) is reconsti- tuted with…

A: In this fir of all determine the amount of  alefacept in an injection of 0.6 ml.  The amount…

Q: Calculate the gravimetric factor of: FeO in Fe2O3 Bi2S3 in BaSO4 BaSO4 in (NH4)2SO4 Mn2O3 in Mn3O4…

A:

Q: A technician is setting up a laboratory to standardise ~0.0200 mol dm–3 KMnO4. What mass of Mohr’s…

A: Given: The molarity of KMnO4 is 0.0200 mol dm-3 The volume of KMnO4 is 20.0 cm3 The volume of Mohr's…

Q: Data Sheet II. Delivering Solution from the Buret (1) final buret reading, mL (2) initial buret…

A: Given data is:

Q: (a) Explain why dissolving a precisely known mass of solid NaOH and making the solution up to 250.0…

A: Volumetric flask is used for preparing a fixed volume of solution. Like for preparing 250 ml…

Q: One of the standard solutions used in preparing the Calibration curve in Figure 1 was a 88.5 mM…

A: Given -  Molarity of Cr(NO3)3 Solution = 88.5 mM  =  88.5×0.001 = 0.0885 M  And, volume of this…

Q: Match each of the following to its correct answer H,50 (aq) Choose... is Choose... heterogenous…

A: Strong electrolyte are those which dissociate completely into its ions. Weak electrolyte dissociates…

Q: Name and describe the five (5) primary standards used for NaOH.

A: A standard solution is a solution of accurately known concentration. It can be prepared by…

Q: In a Spec-20 experiment a student took 4.3178g of an unknown material containing cobalt and…

A: Given data,Mass of sample=4.3178gMolarity of Co solution=0.075MVolume of solution=250mL=0.250L

Q: 1. The mass of a weigh boat containing NaCl (58.44 ± 0.01 g/mol) was 3.6865 ± 0.0002 g. The mass of…

A: #(i): Given the molar mass of NaCl = (58.44 ±0.01) g/mol Volume of the solution prepared = (500.00 ±…

Q: Run 1 Volume of Vinegar 2.00 mL Used Concentration of NaOH Initial Buret reading Final Buret reading…

A: Stoichiometry, in balanced chemical reaction is defined by the ratio at which reactants are reacting…

Q: Suggest two different reactions for microchemical analysis of Mercury(II) ion in aqueous solution.

A: Two different reaction for microchemical analysis of Mercury (II) ion in aqeous solution is -:

Q: Ammonia reacts with hypobromite, OBr- as follows: 2NH3      +    3OBr-    →    N2  + 3Br-  + 3H2O…

A: Molarity is defined as total number of solute present in 1000 ml of solution . For neutralisation we…

Q: The standard solutions of iron(III) thiocyanate (solutions of known concentration) were prepared for…

A: Purpose: The equilibrium constant for the formation of iron(III) thiocyanate complexion is to be…

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

A: Introduction :  Percent error is an expression to let know the difference between calculated value…

Q: Magnesium Chloride is available as magnesium chloride hexahydrate in an injectable solution that…

A: Magnesium chloride hexahydrate is MgCl2.6H2O

Q: Five white, 500-mg uncoated ascorbic acid (AA) tablets with an average weight of 0.6152-g were…

A:

Q: Calculate the moles of I3" reduced by S2032- using the following data: • Sample volume (mL) - 200.0…

A: Qualitative analysis is a branch of chemistry that deals with the identification of elements present…

Q: Discuss the following general steps in gravimetric analysis. Sample solution Preparation…

A: 1) Sample solution preparation - This may involve several steps including adjustment of the pH of…

Q: ammonium carbonate + chromium (III) acetate Mol: Ionic: Net:

A:

Q: . What is the gravimetric factor of SO3 in BaSO4? 2. What is the normality of an oxidizing agent of…

A: The question is based on the concept of analytical chemistry. We have to calculate gravimetric…

Q: 15.00g solid mixture containing Ca(OH)2, among other non-basic components, was neutralized with…

A:

Q: what chemical test is used to distinguish the two? a. bromine b. molisch's test c. lucas d.…

A:

Q: 54.Primary standard used in the standardization of sulfuric acid a. Benzoic acid C. Sodium carbonate…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Which of the following is the gravimetric factor formula for the following pair of substances? FW…

A: Generally the gravimetric factor formula is expressed as: GF=a×FWanalyteb×FWprecipitate Here a and b…