A 0.500 g of sample containing Na2CO3 and inert matter is analysed by adding a slight excess of 50.0 mL of 0.100 M HCl, boiling to remove CO2, and then back titrating the excess acid with 0.100 M NaOH. If 5.6 mL NaOH is required for the back titration, calculate the percent Na2CO3 in the sample

Q: A student weighs out 0.9854 g of Na2CO3 unknown and dissolves it in 25.00 mL of deionized water. A…

A: Answer % of Na2CO3 in the unknown = 54.05% Formulas No.of moles                           = Given…

Q: An analytical chemist is titrating 140.2 mL of a 0.5600M solution of isopropylamine ((CH3)2CHNH2)…

A: Step 1: 1. Calculate moles of isopropylamine initially:   Initial moles of isopropylamine=0.1402…

Q: Two 100 ml samples are taken from a solution containing Na2CO3 and NaHCO3, they are titrated with…

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Q: Consider the titration of 100.0 mL of 0.100 M H₂NNH₂ (Kb = 3.0 x 10-6) by 0.200 M HNO3. Calculate…

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Q: A 5.850-g sample containing KCl and KClO4 was dissolved in sufficient water to give 250.00 mL of…

A: Given , Reaction : 8V3+ (aq) + ClO4- (aq) + 12H2O (l)→Cl- (aq) + 8VO2+ (aq) + 8H3O+ (aq) Volume of…

Q: An analytical chemist is titrating 163.2 ml. of a 0.7200 M solution of isopropylamine ((CH3)2 CHNH₂)…

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Q: An analytical chemist is titrating 139.4 mL of a 0.7600M solution of isopropylamine ((CH3)₂CHNH₂)…

A: Volume of isopropyl amine solution=  139.4 mL  Molarity of isopropyl amine solution= 0.7600M…

Q: A buffered solution was prepared by dissolving 6.85g of sodium formate (NaHCOO in 250.0mL (16) of a…

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Q: Calculate the pH at the equivalence point in titrating 0.028 M solutions of each of the following…

A: a)

Q: 10.71

A: Molarity of HCl(M)= 0.050 M Volume of HCl(V) = 25 mL Mmol of HCl =  M × V      = 0.050 × 25 = 1.25…

Q: Sulfur containing compound weighing 4.8670 grams was digested and purified to form H,SO,. A 25.00-mL…

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Q: The pK, of hypochlorous acid is 7.530. A 60.0 mL solution of 0.141 M sodium hypochlorite (NaOCI) is…

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Q: 20 a Consider the reaction of a 20.0 mL of 0.220 M CsHsNHCI (Ka = 5.9 x 10-6) with 12.0 mL of 0.231…

A: Answer:Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: A 1.0 g sample containing urea was dissolved in water and diluted in a 100.00 mL volumetric flask.…

A: When Urea  reacts with sulphuric acid then ammonia is produced.  Now this ammonia is treated with…

Q: A buffer is to be prepared from acetic acid (CH3COOH) and sodium acetate (NACH3COO). What ratio of…

A: Correct answer is 100 : 1. pka = -log ka = -log ( 1.82 x 10-5 ) = 5 - 0.26 = 4.74 Henderson equation…

Q: A 50.0 mL solution of Ca(OH)2 with an unknown concentration was titrated with 0.340 M HNO3. To reach…

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both…

Q: Buffer preparation: A 6.90 g sample of sodium nitrite (NaNO2, 68.995) was dissolved in about 100. mL…

A: Given,  When 6.90g of NaNO3 was dissolved in 100.0 mL of water then added to 500mL of 0.200 M HNO2…

Q: 3) In the treatment of myasthenia gravis, 10 mg of guanidine (NH-C(NH2)2) per kilogram of body…

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Q: A 0. 238 g sample contained only NaCı and KBr. It was dissolved in water and required 48. 40 ml of…

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Q: Draw the shape of a pH curve for the titration of 400 mL of 1.0 M H2SO3 with 0.5 M NaOH. What type…

A: The titration curve for the titration of 400 mL of 1.0 M H2SO3 with 0.5 M NaOH solution is needed to…

Q: The pK, value for HNO, is 3.35. Would a buffer prepared from HNO, and KNO, with a pH of 5.15 be…

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Q: Calculate the pH for a buffer made with 230.0 mL of 0.189 M furoic acid (HC5H3O3) and 20.0 mL of…

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Q: A 50.0 mL solution of 0.119 M KOH is titrated with 0.238 M HCI. Calculăte the pH the given amounts…

A: pH is a measure of acidic or basic characters. The range of pH is from 0 to 14,  7 is neutral , if…

Q: A 0.1504-g sample of impure Na₂CO₃ (106.00g/mol) was analyzed via Volhard method. After adding 50.0…

A: Here we are required to find the purity of Na2CO3.

Q: (a) A buffer solution is prepared by 95 g sodium acetate to 250 mL of 0.150 M acetic acid. pKa =…

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Q: Calculate the volume of sodium acetate (in mL) required to prepare 125.0 mL of a buffer with a final…

A: 0.450 M acetic acid and 0.450 M sodium acetate were used to prepare 70.0 mM of 125.0 mL buffer…

Q: Please provide detailed solution and give explanation of the concept

A: We are asked to find the volume of 1.35 M HCl that must be added to 0.264 L of 0.213 M dimethylamine…

Q: Buffer preparation: A 6.90 g sample of sodium nitrite (NANO2, 68.995) was dissolved in about 100. mL…

A: Given,  When 6.90 g sample of NaNO2 was dissolved in 100.0 mL of water and it is added to 500. mL of…

Q: Potassium hydrogen phthalate (KHP) concentrations can be determined through titrating samples of KHP…

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Q: The pK₂ value for HF is 3.14. Would a buffer prepared from HF and KF with a pH of 2.64 be considered…

A: Henderson-Hasselbalch equation is used for pH of a buffer solution. pH = pKa + log[conjugate…

Q: A 25.4mL sample of 0.156 M HCl is titrated with 0.249 M NaOH. Calculate the pH after the addition of…

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Q: 13.0 to precipitate Mg(OH)2, and 5.55 mL of the same titrant was used to attain the endpoint. (MW:…

A: To determine the total hardness of the water, you will need to calculate the concentration of Ca and…

Q: In the titration of Y(OH)3 with HX, which of the following equations should be used to calculate the…

A:

Q: Calculate the mass of Cd(OH)2 that will dissolve in a buffer made by combining 400.0 mL of 8.0 M NH3…

A: Henderson hasselbalch equation: pOH=pKb+log[conjugate acid][weak base]

Q: The titration of 25.00 mL of 0.536 M of an unspecified diprotic weak acid (H2A) with 1.00 M…

A: Volume of H2A = 25.00 mLConcentration of H2A = 0.536 MConcentration of KOH =1.00 MKa1 = 1.0 x 10-3…

Q: 9a. Phosphoric acid, H3PO4, is a trivalent acid with pKs1 = 2.12, pKs2 = 7.21, and pK $3 = 12.37.…

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Q: determination of formic acid by neutralization volumetry, the pH was calculated as a function of the…

A: Answer- Ka=1.70x10-4. for Formic acid.

Q: A titration of 0.075M C6 H5 COOH with 10.00 mL  0.0150 M NaOH. The acid dissociation constant of…

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

Q: A 0.454 g sample of an unknown monoprotic acid is titrated with 0.300M KOH to the equivalent point.…

A: Let 'HA' be the monoprotic acid. Reaction of HA and KOH is, HA + KOH  ---->  KA + H2O

Q: A 50.050.0 mL solution of 0.1600.160 M KOHKOH is titrated with 0.3200.320 M HClHCl. Calculate the pH…

A: The titration reaction taking place is given by, => HCl + KOH --------> KCl + H2O Given :…

Q: (a) A buffer solution is prepared by 95 g sodium acetate to 250 mL of 0.150 M acetic acid. pKa =…

A: The objective of this question is to calculate the initial pH of a buffer solution and the pH after…

Q: o A 55.0 mL solution of 0.150 M potassium alaninate ( H₂NC₂H₂CO₂K) is titrated with 0.150 M HCl. The…

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Q: A 100.0 mL solution containing 0.973 g of maleic acid (MW = 116.072 g/mol) is titrated with 0.364 M…

A:

Precipitation Titration

Precipitation analysis is used to analyze drugs, and to measure the salt content in food and beverages. It is an important concept from the examination point of view many practical questions are asked on the topic. This topic is significant in the professional exams for both undergraduate and graduate courses, especially for