A 0.2850 g sample of lye ( impure NaOH) was weighed out and dissolved in water, 44.54 mL of 0.150 N HCl was required to titrate the sample to the end point. What was the % purity of the lye? * a. 93.75 % b. 85.63 % c. 66.35 % d. 73.65 %

Q: Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl…

A: Answer is given below

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

A:

Q: ). A 12.5% (w/w) NiCl2 (129.61 g/mol) solution has a density of 1.149 g/mL. Calculate a) The molar…

A: The density and percentage can be used to calculate the molarity by using following relation - M =…

Q: The titration of 25.00 mL of an unknown concentration of H2SO4 solution requires 32.28 mL of 0.420 M…

A: Given, reaction : H2SO4(aq)+2LiOH(aq)→Li2SO4(aq)+2H2O(l)

Q: A chemist needs to determine the concentration of a sulfuric acid solution by titration with a…

A:

Q: 9. A student carries out a titration to determine the molar mass of an unknown acid, A • The student…

A: Given: Mass of acid = 2.24 g Volume of solution = 250.0 cm3 Volume of acid = 25.0 cm3 Molarity of…

Q: A chemist needs to determine the concentration of a sulfuric acid solution by titration with a…

A: The values are given as follows:

Q: A 1.047 g sample of canned tuna was analyzed by the Kjeldahl method; 24.61 mL of 0.1180 M HCl were…

A: Given data contains, Mass of canned tuna is 1.047 g. Volume of HCl is 24.61 mL. Molarity of HCl is…

Q: A sample of a crude grade of sodium hydroxide is sent to a laboratory to be tested for sodium…

A:

Q: A 2.00 L graduated cylinder contains 1.40 L of buffer solution. The density of the buffer solution…

A:

Q: 87. What is the use of barium hydroxide in the precipitation of standard NaOH solution? a. catalyst…

A: For HCl and NaOH, normality and molarity are same thing.

Q: Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask…

A: Given: mass of acid = 2.92 g Volume of acid solution prepared = 250 mL = 0.250 L…

Q: A 0.4334 g sample of canned tuna was analyzed by the Kjeldahl method; 24.61 mL of 0.1180 M HCl were…

A:

Q: he standardization of iodine solution was conducted using 10.0 mL of a standard 1.00 m ith the…

A: Given, Volume of acid  = 10.00 mL Density = 1.00 mg/mL Mass = V × d   = 10.00 × 1 = 10.0 mg MMoles…

Q: A 0.4334 g sample of canned tuna was analyzed by the Kjeldahl method; 24.61 mlLof 0.1180 M HCI were…

A:

Q: 12. A volume of 23.45 mL of NaOH was used to titrate a sample of KHP (KHC8H4O4) with a mass equal to…

A: The number of moles is equal to the ratio of mass to the molar mass of the substance. It is denoted…

Q: 0.300 g of a nitrogen-containing sample is analyzed by the Kjeldahl method and the released ammonia…

A: The Kjeldahl method is a method for the quantitative determination of nitrogen contained in organic…

Q: A 22.41 mL of NaOH solution is required to reach the phenolphthalein endpoint in the standardization…

A: NaOH is secondary standard so we need to standardised it before performing other titrations. NaOH…

Q: Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl…

A: Bleaching solution contains sodium hypochlorite (NaOCl), which can be determined by titrating…

Q: A 0.2377 g sample of sodium chloride, NaCl (58.44 g/mol) was dissolved in water and diluted to mark…

A: Given: Mass of sample = 0.2377g

Q: A 2.00 L graduated cylinder contains 1.40 L of buffer solution. The density of the buffer solution…

A:

Q: RECRYSTALLIZATION A. PRINCIPLE INVOLVED     What is the principle behind this process?

A: Recrystallization is a technique used to purify chemicals by dissolving both impurities and a…

Q: A solution of hydrogen peroxide, H2O2, is titrated with a solution of potassium permanganate, KMnO4.…

A:

Q: 5. 2.6477 g of the reducing agent FeSO4 was titrated to the equivalence point with 17.25 mL of a…

A:

Q: During titration, an aqeous solution of HCI has a concentration of 0.1396 mol dm. If 24.71 cm (24.71…

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

Q: What volume of 0.7777 M HNO3 is needed in order to produce 200 mL of 0.1550 M HNO3?

A:

Q: Determine the volume of 0.205 MM KOHKOH solution required to neutralize each sample of sulfuric…

A: The neutralization reaction takes place as,                             H2SO4 (aq) +2 KOH (aq)   →…

Q: 1.3562 g of table salt was taken and dissolved in 250 mL of water. Calculate the % chloride amount…

A: The balanced equation for the reaction between NaCl and AgNO3 is   NaCl (aq) + AgNO3 (aq)…

Q: 1) The 1.628 g stibnite sample containing antimony is dissolved in water to a volume of 250 mL. To…

A: Let mass of Sb2S3 in the sample be = x gm Valency factor of Sb2S3 = 6 [ L.C.M of charge on cation…

Q: A 0.917-g sample of canned tuna was analyzed by the Kjeldahl method. A volume of 20.59 mL of 0.1249…

A:

Q: A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analyzed by dissolving the sample and…

A: A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analysed by dissolving the sample and…

Q: During a titration, it is found that 59.5 mL of a solution of NaOH is needed to neutralize a…

A: At the endpoint of neutralization no of the equivalent of acid =number of the equivalent of base  or…

Q: A 1.345 g sample of solid residue from a hazardous waste dump is being analyzed for barium. The…

A: A particular sample contains various types of compound .That can be estimated .

Q: A 0.678-g sodium carbonate sample with 98.6% purity requires 36.8 mL of sulfuric acid solution to…

A: We can determine molarity by using Molarity =  mole of solute/ volume of solvent (in the litter)

Q: Write out the complete balanced equation for the reaction that occurs in this titration. b. How…

A: The question is based on the concept of titrations.   we are titrating  a strong acid with a weak…

Q: Compare the two quantities based on the given condition: A solution containing Ba2+ and trace…

A: A multiple choice question based on qualitative analysis of cations that is to be accomplished.

Q: Which is NOT TRUE about performing a BLANK titration? Choose the best answer. O It involves…

A:

Q: HCL Solution-- 20 mL HCl with 25.46 mL of 0.1240 M NaOH

A: Given values: Volume of HCl solution is 20 mL Volume of NaOH solution is 25.46 mL The concentration…

Q: The mass percent of chloride ion in a 25.00 mL sample of seawater was determined by titrating the…

A: 25. The balanced chemical equation  is  AgNO3 (aq) + Cl- (aq) → AgCl (aq) + NO3- (aq)

Q: A 0.1500 g of salt sample was analyzed for percent chloride (35.45 g/mol) content. The titration of…

A: Concentration (Molarity) of solution can be calculated using the formula, Molarity = Moles of…

Q: 87. What is the use of barium hydroxide in the precipitation of standard NaOH solution? a. catalyst…

A: Q. 87 Ans: (c) precipitate any carbonate present insolution. Barium hydroxide is used in titrations.…

Q: A stock solution containing Mn2+ ions was prepared by dissolving 1.584 g pure manganese metal in…

A: Given that, Mass of Mn= 1.584 g Volume of stock solution = 1.00 L Now, 10.00 mL of this stock…

Q: Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL Erlenmeyer flask…

A: Given: Concentration of NaOH solution = 0.18 M

Q: A student was tasked to neutralize 29.9 mL solution of 0.706 M H2SO4 (98.079 g/mol) using 0.428 M…

A:

Q: A 0.4040-g sample of potassium hydrogen phthalate, KHC8H4O4 (molar mass = 204.44 g/mol) is dissolved…

A: The molar concentration is the molarity of solution which is defined as a number of moles of solute…

Q: A 1.047 g sample of canned tuna was analyzed by the Kjeldahl method; 24.61 mL of 0.1180 M HCI were…

A: In kjeldahl method, percentage of Nitrogen can be calculated as given formula: =(1.4 * molarity of…

Q: A sample of KHP, KHCaH.O., weighing 2.035 g is titrated with NaOH and backtitrated with HCI. NoOH…

A: Given: Mass of sample of KHP =2.035 g Volume of NaOH required =23.20 mL Volume of HCl required…

Q: To determine the mass of calcium carbonate present in a 0.125 g sample of chalk, the chalk sample…

A: Acid-base titrations can be used to find the concentration of unknown acid/base by titrating it…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.