molarity

Q: The active agent in many hair bleaches is hydrogen peroxide. The amount of H2O2 in 14.8 g of hair…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: A 0.1285-g sample of impure Na2CO3 was dissolved in 20.00 mL of 0.2034 M HCl. The excess HCl was…

A: We will first find out the actual mass of Na2CO3 present in the sample by calculating the moles of…

Q: Twenty tablets of an iron food supplement whose total mass was 22.131 g were crushed and perfectly…

A: Answer: This question is based on the relation between mass, molar mass and number of moles and by…

Q: If a solution of silver nitrate, AgNO,, is added to a second solution containing a chloride,…

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Q: When 38.0 mL of 0.1250 M H2SO4is added to 100. mL of a solution of PbI2, a precipitate of…

A: We first find the moles of PbSO4 = mass/molar mass  Thus moles of PbSO4 = 0.0471/303…

Q: The arsenic in a 1.203 g sample of a pesticide was converted to H3AsO4 by reaction with concentrated…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves…

Q: The ascorbic acid, C6H806 (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was…

A: I have attached a detailed solution for the question in the following steps:

Q: The arsenic in a 1.223-g sample of a pesticide was converted to H3AsO4 by suitable treatment. The…

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Q: Standard Sodium Chloride Weighed mass of NaCl Purity of NaCl Molar concentration of NaCl using…

A: Molar concentration of NaCl :M = ​(m × p)/ ( V × Mw )​ where M is molarity, m is mass, p is purity,…

Q: The amount of sulfate in a solid sample was determined by first dissolving 562.2 mg of sample in…

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Q: of 0.1250 M H2SO4 is added to 100. mL of a solution of Pb(NO3)2, a precipitate of Pb O4 is then…

A: Given data set: 38 ml of 0.1250 M H2SO4 100 ml Pb(NO3)2 Molar mass of PbSO4 = 303 g The chemical…

Q: 2. The arsenic in a 1.203-g sample of a pesticide was converted to H3ASO4 by suitable treatment. The…

A: Given that,Weight of pesticide = 1.203gVolume of  = 40 mLMolarity of = 0.05871 MVolume of  = 9.63…

Q: A 55.00 mL solution of 0.3900 M AgNO, was added to a solution of Aso " . Ag, AsO, precipitated and…

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

Q: Calculate the concentration of CO²- In an aqueous solution of 0.255 M carbonic acid, H₂CO₂ (aq).…

A: Carbonic acid, H2CO3 is a diprotic acid with Ka1 = 4.47*10-7 and Ka2 = 4.68*10-11  Given the…

Q: The purity of a pharmaceutical preparation of sulfanildamide (C6H4N2O2S), is prolonged oxidizing the…

A: Mass of sample = 0.5136 g Molarity of NaOH = 0.1251 M Volume of NaOH required = 50.00 mL = 0.050 L

Q: 2. A sample consists of a mixture of Fe(NO3)2 (s) and Fe(NO3)3 (s) in unknown proportion. A total of…

A: 2. Sample mixture : FeNO32 + FeNO33Total 3.65 g of mixture was dissolved in phosphoric acid…

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 4.955-g sample of a petroleum product was burned in a tube furnace, and the SO₂ produced was…

A: The question is based on the concept of solutions.We need to determine concentration sulphur…

Q: 0.683 grams of iron mineral dissolves with acid. Fe2+ ​​is titrated with Ce(SO4)2. Calculate the…

A: Percentage can be calculated by finding the mass of Iron present in the solution.  From titatration…

Q: A 5.00 gram sample containing NaCl was treated with 50 mL of 0.1995N AgNO3 and required 10.45 mL of…

A: Here we are required to find percentage purity of NaCl.

Q: 1) In the standardization of a sodium hydroxide (NaOH) solution, 1.0211g of potassium biphthalate…

A: Primary Standard - It is a solution which is accurate and does not need to be calibrated for further…

Q: The arsenic contained in 7.150 g of a pesticide sample was converted into arsenate ions, which were…

A: The above question is explained by using POAC( principle of atom conservation) Mass of As is…

Q: In order to calculate the volume of an irregularly shaped container, a chemist added 108.2 g of NaCl…

A: First of all, you need to find the molarity of NaCl solution present in the container. Once you get…

Q: 30.0 mL of 0.400 M Zn²+ is mixed with 100.0 mL of 0.200 M F (Ksp ZnF₂ = 0.030). In the mixture you…

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Q: A mixture containing only KCl (74.55 g/mol) & NaBr (102.89 g/mol) was analyzed by the Mohr method. A…

A: Chloride ion concentration of an unknown sample can be calculated using Mohr method.  In Mohr…

Q: Write the two pertinent balanced reactions (standardization and sample analysis) 2. Calculate the…

A: Standardization Reaction:5Na2C2O4 + 2KMnO4 + 8H2SO4 → 2MnSO4 + 10CO2 + 5Na2SO4 + K2SO4 + 8H2OSample…

Q: The arsenic in a 1.203-g sample of a pesticide was converted to H₃AsO₄ by suitable treatment. The…

A:

Q: Complete and balance the following equations: (a) Mg;N2(s) + H,0(I) (b) C3H;OH(1) + 02(8) (c)…

A: The complete and balanced reactions are as follows: (a)

Q: A sample contains MgCl2 (95.211 g/mol) and KCl (74.551 g/mol). A 6.3674-g sample was dissolved in…

A: Precipitation refers to formation of product as solid mass that settles at the bottom. Such…

Q: A 1.223 g sample containing arsenic (As) was converted to H3ASO4 by suitable treatment. 40.00 mL of…

A: Given : Initial sample = 1.223 g Volume of AgNO3 = 40.00 ml Molarity of AgNO3 =0.07891 M  Molarity…

Q: A 1.560 g sample of metal ore was dissolved and the metal (Fw=48.12g/mol) was oxidized to a metal…

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Q: The arsenic in a 1.208-g sample of a pesticide was converted to H3 AsO4 by suitable treatment. The…

A:

Q: 0.753-g sample of a chlorocarbon compound was analyzed by burning it in oxygen and collecting the…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: A solution of oxalic acid dihydrate (H₂C₂O₄･2H₂O) with a known concentration of 0.400 M H₂C₂O₄･2H₂O…

A: At equivalent point mole to stoichiometry is equal of both reactants

Q: Determine the pH at the equivalence point of a titration of 100.0 mL of 0.265 M CH₂NH₂ solution with…

A: Answer: Conjugate acid of weak base gets hydrolyzed in water and produces H3O+ ion and as CH3NH2 is…

Q: The aluminum (AW=26.98 g/mol) in a 1.000-g sample of impure ammonium aluminum sulfate was…

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Q: MnO4 (aq) + H2O2 (aq) → Mn2+ (aq) + O2 (g) (a) Sketch a flask containing an analyte solution before…

A: To sketch the flask at different points in the titration of hydrogen peroxide(H2O2) solution with…

Q: An as received sample of the salt Sn3(PO4)2 (546.0727) weighing 5.0550 g was dissolved in water. The…

A: Weight of Sn3 (PO4)2 sample = 5.0550 g        Mola mass of Sn3 (PO4)2 = 546.0727        Sn2+…

Q: Samples containing oxalate ion can be titrated with solutions containing permanganate ion under…

A: From the given reaction we can see that, 2 moles of KMnO4 ( or MnO4-) will react with 5 moles of…

Q: A 0.750 g sample of finely ground limestone was placed in an Erlenmeyer flask, and 25.00 ml of 1.00…

A: Mass of sample = 0.750 g Initial molarity of HCl = 1 M Initial volume of HCl = 25 mL or 0.025 L…

Q: 1.250 g sample of cheese was subjected to a Kjeldahl analysis to determine the amount of protein.…

A: Mass of sample = 1.250 gm  Molarity of HCl = 0.1050 M  Volume of HCl = 50 ml  Molarity of NaOH =…

Q: A sample weighing 3.458 g is dissolved and diluted to exactly 250.0 mL in a volumetric flask. A 50.0…

A: Given, A sample weighing 3.458 g is dissolved and diluted to exactly 250.0 mL in a volumetric flask.…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.