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- Run 1 Run 2 Molarity of KMnO4 solution (M) from bottle 0.00101 0.00101 Initial reading of buret KMnO4 (mL) 0.62 11.35 Final reading of buret KMnO4 (mL) 11.33 21.70 Run 1 Run 2 Volume of KMnO4 solution (mL) Moles of MnO4- used for titration (mol) Moles of C2O42- in 100.0 mL of solution (mol) Molarity of C2O42- (M) Molarity of Cd2+ (M) Ksp of CdC2O4 Average Ksp of CdC2O4 Calculations: Moles of MnO4- used for titration of saturated solution CdC2O4 Moles of C2O42- in 100.0 mL of saturated solution of CdC2O4 Molarity of C2O42- in saturated solution of CdC2O4 Molarity of Cd2+ in saturated solution of CdC2O4 Solubility product, Ksp, of CdC2O4Starting with a 6.649 M stock solution of HNO3, five standard solutions are prepared via serial dilution. At each stage, 25.00 mL of solution are diluted to 100.00 mL. Determine the concentration of and the number of moles of HNO3 in the final (most dilute, Md5) solution.Volume of concentrated reagant required to prepare diluted solutions below: 16 M H3PO4 to prepare 921 mL of 5.0 M H3PO4 16 M H2SO4 to prepare 255 mL of 6.5 M H2SO4 18 M HNO3 to prepare 196 mL of 0.33 M HNO3 15 M NH3 to prepare 75 mL of 2.1 M NH3
- Starting with a 6.861 M stock solution of HNO3, five standard solutions are prepared via serial dilution. At each stage, 25.00 mL of solution are diluted to 100.00 mL. Determine the concentration of and the number of moles of HNO3 in the final (most dilute, Md5) solution. Md5 = ___ M mol5 HNO3 = ___molSolute: H2SO4 Composition of Solution: mole% H2SO4 = 40 % Density, g/mL: 20 degrees: 1.681 ; 80 degrees: 1.625 Find: 1. g solute per 100 mL of solution at 80 degrees 2. g solute per 1000 mL of solution at 20 degrees 3. ppm of soluteDapsone tablets, labelled 50 mg has an average tablet weight of 0.6509 g. 2.0g of powdered tablets reacted (see reaction below) with 26.05 mL of 0.0506N sodium nitrite (NaNO2) solution. Determine the amount of Dapsone as a percentage of the Label Strength (or Label Claim). Report your answer to 1 decimal place. Given: Dapsone molar mass, 248.302 g/mol Dapsone structure Reaction: Sodium nitrite (NaNO2) reacts with hydrochloric acid (HCl) to generate nitrous acid (HNO2). NaNO2 + HCl ® HNO2 + NaCl Nitrous acid (HNO2) then reacts with each amino group on Dapsone, and an indicator indicates the endpoint. R-NH2 (full structure shown above) + HNO2 + HCl ® R-N2Cl + 2H2O
- How much amount of solids (in grams) do you need to prepare the following solutions? 1. 500.0 mL 0.1000 M stock EDTA solutiona. Weigh an appropriate amount of Na2H2EDTA2H2O (FW=372.24) to the nearest 0.1 mg 2. 100.0 mL 0.0500 M stock Ca2+ solutiona. Weigh appropriate amount of pure CaCO3 (FW=100.09) to the nearest 0.1 mg into a 250 mL beaker.Use the information given to find the answer Part A.) 6MM IN 25 mol of hexane (g) (Keep in mind that gkh do not have an entire liter of the solution calculate the mass of 6MM that is present in 25 mL of the solution that you do have) Part b.) 6 MM in 25 mo of hexane (uh) convert the mass of 6MM FROM (g to ug) Part C.) 6MM IN XARROTS (ug / g) (keep kn mind that 6MM was extracted from the weighed portion of the carrots calculate the mass of 6MM PER GRAM of carrotA solution of sulfuric acid was made by dissolving 20.0g of 98% sulfuric acid in a 250mL of water. (H2SO4 = 98.078 g/mol; H2O = 18.015 g/mol)Additional information for 35-37 What if the solution has a total volume of 262ml? 1. Express the concentration of this solution in % by weight.a. 7.3%b. 4.4%c. 8.0%d. 7.8% 2. Express the concentration in molaritya. 0.10 Mb. 2.00 Mc. 0.76 Md. 0.93 M 3. Express the concentration in normalitya. 2.0 Nb. 1.5 Nc. 1.0 Nd. 0.76 N 4. Express the concentration in molalitya. 0.80 mb. 0.77 mc. 1.00 md. 1.50 m
- What is the percent magnesium hydroxide, if a sample of magnesia magma weighing 5.2430g when dissolved in 25 mL of 0.9915 N H2SO4 required 9.85 mL of 1.4102 N NaOH to titrate the excess acid? Round to 2 decimal point; Answer should be with the correct unit.Help me answer this question please and show your complete solution please thank you. 8. Suppose you will prepare a 1:1 by ass NaOH solution using 30g NaOH of 97% purity (density=2.13g/mL). . Using this stock solution, you are again to prepare 0.1 M using a 1-L volumetric flask. How much of the solution do you need to prepare such? Use 1g/ml as density of water.28. A solution contains 125 g of a compound and 555 g water. The boiling point of the pure solvent is 100.00 oC. The solution has the boiling point of 102.40 oC. Calculate molar mass of compound. Kb for H2O : 0.52 oC kg / mole i = 3 Group of answer choices a.65.9 g /mole b.125 g/ mole c.146 g/ mole d.14.5 g/ mole